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Патент USA US3052584

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Sept. 4, 1962
M. T. KENNEDY, JR
3,052,574
TANK CLEANING DEVICE AND METHOD
'7 Sheets-Sheet l
Filed May 14, 1958
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INVENTOR
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Merritt‘
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BY
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ATTORNEY
SePt- 4, 1962
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M. T. KENNEDY, JR
3,052,574
TANK CLEANING DEVICE AND METHOD
Filed May 14, 1958
7 Sheets-Sheet 2
47
33
l | NVE NTOR
Mel-r1166 fffemzeiz’y,fn
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ATTORNEY
Sept. 4, 1962
3,052,574
M. T. KENNEDY, JR
TANK CLEANING DEVICE AND METHOD
7 Sheets-Sheet 3
Filed May 14, 1958
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Sept. 4, 1962
M. T.-KENNEDY, JR
3,052,574
TANK CLEANING DEVICE AND METHOD
7 Sheets-Sheet 4
Filed May 14, 1958
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INVENTOVR
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Merrih‘fifenne
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' ATTORNEY
Sept. 4, 1962
M. T. KENNEDY, JR
3,052,574
TANK CLEANING DEVICE AND METHOD
7 Sheets-Sheet 5
Filed May 14, 1958
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20th. Stripe
of lst. Cycle
NOZZLE
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END
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of 2nd. Cycle
2Ist. Stripe
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2nd. Stripe
of lst. Cycle
NOZZLE
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3rd. Stripe
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3rd. Stripe
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4th. Stripe
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INVENTOR
ATTORNEY
Sept. 4, 1962
‘
M. T. KENNEDY, JR
3,052,574
TANK CLEANING DEVICE AND METHOD
Filed May 14, 1958
7 Sheets-Sheet 6
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M
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INVENTOR
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ill-217666 Zifwzneci #51
Sept. 4, 1962
M. T. KENNEDY, JR
3,052,574
TANK CLEANING DEVICE AND METHOD
FiledvMay 14, 1958
lzgL/
7 Sheets-Sheet 7
*4/24
ATTORNEY
if
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3,®5Z,574
States iatent
Patented Sept. 4, 1962
2
1
signed to permit adjustment in the nozzle or nozzles to
3,052,574
Merritt T. Kennedy, Jr., Port Washington, N.Y., assignor
control the speeds thereof, without materially changing
the jet impingement stripe pattern generated.
to Pyrate Sales, Inc, Bayside, N.Y., a corporation of
nection with a modi?cation thereof, a new and improved
TANK CLEANING DEVICE AND METHGD
Nevada
Filed May 14., 1958, Ser. No. 735,210
33 Claims. (Cl. 134—24)
A further object of the invention is to provide a con
cleaning device of the dual axis type ‘described, which is
designed to be connected in series with one or more simi
The present invention relates to a device and method
lar cleaning devices for simultaneous operation, as for
example in a deep tank, at different levels.
action nozzles mounted for rotation about an axis and
against contact with the cleaning liquid passing through
Another object of the present invention in connection
for cleaning the inside wall surfaces of tanks, vats, drums, 10
with
a modi?cation thereof, is to provide a new and im
containers, etc.
proved cleaning device of the dual axis type described
In accordance with certain features of the present in
having gear transmission parts housed and protected
vention, the cleaning device comprises one or more re
mounted for simultaneous rotation bodily about another 15 the device.
A further object of the invention is to provide a new
axis at right angles to said ?rst mentioned axis. The dual
axis rotation of the nozzle or nozzles is entirely auto
matic. As the liquid used for washing passes through
the discharge end of each nozzle, the reaction created
turns the nozzle about one of the axes hereinafter re
ferred to as the nozzle axis and a drive connection be
and improved cleaning device and a new and improved
cleaning method employing such a device for effectively
cleaning long tanks even in the end regions of said tank
20 remote from the device.
In accordance with some features of the present inven—
tion, the braking device comprises a braking member of
tween the nozzle and the housing or turret carrying the
irregular contour immersed in a body ‘of viscous liquid
nozzle causes the housing or turret to rotate simulta
sealed in a casing or drum member, one of said mem
neously about the other axis, hereinafter referred to as
the housing or turret axis. The resulting simultaneous 25 bers ‘being stationary, while the other member has a drive
connection with the nozzle, so that as the nozzle rotates
rotations of each nozzle about the two axes at right
about its axis, the latter member also rotates in relation
angles to each other, causes the nozzle to project a high
velocity cleaning jet against the inside of the tank walls
to the viscous liquid, thereby exerting resistance to the
following a helical jet impingement stripe pattern on
said walls around the top, bottom and sides of the tank.
rotation of the nozzle about its axis due to friction or the
inertia of the liquid to movement or to both. The reac
tion nozzle or nozzles are thereby slowed down to the
The term “helical” is used herein in a broad sense, since
the tank may be of rectangular, cylindrical or other
shape.
The liquid employed for washing and for driving the
nozzle or nozzles about the two axes must be under suf
point where effective cleaning of the wall surfaces is
assured. The braking member is desirably shaped to im
part a shearing action on the viscous braking liquid
35 smoothly with a minimum of stresses and vibrations on
the cleaning device.
In accordance with another feature of the present in
for effective impactive cleaning and the nozzle or nozzles
vention, two nozzles are provided on a common axis hav
are therefore driven by the reaction of the liquid at high
ing inlet legs respectively extending substantially radially
speed unless controlled. Since the extent of cleaning of
a wall surface depends inversely as the rate of sweep of 40 in opposite directions from a common inlet chamber or
nozzle eye in axial alignment, and discharge legs respec—
the cleaning jet over the surface, it is seen that the rapid
tively reversed 180° so that the axes of said discharge legs
cutting of the jet across the surface to be cleaned is not
extend substantially parallel to the common alignment
usually desirable. Moreover, since the spaces between
axis of said inlet legs and the nozzles will be U-shape.
direct jet impingement stripes on the wall surfaces may
The discharge legs of the two nozzles are relatively turned
have to depend on run downs of liquids from these stripes
for cleaning, and since the amount of this run down 45 in relation to the alignment axis of the inlet legs to create
?cient pressure to produce therefrom high velocity jets
liquid depends on how slowly the cleaning jet traverses
reaction forces on the nozzles upon the passage of clean
the wall surface, it is seen that a fast traverse of the jet
across the wall surface causes ineffectual washing of these
ing liquid therethrough tending to rotate both nozzles in
wall spaces. It is, therefore, advantageous to employ a
braking mechanism in connection with the cleaning de
vice to slow down and control the rate of revoltuion of
each nozzle about its two axes.
One object of the present invention is to provide a
new and improved tank cleaning device of the reaction
the same direction and with equal forces about the axis
of rotation of the nozzle. To develop maximum reaction
forces on the nozzles tending to rotate them about the
axis of rotation of the nozzle, the discharge axes of the
discharge legs should extend in a common plane with the
alignment axis of the inlet legs at right angles to the noz
zle axis and the discharge legs should be turned in oppo
nozzle type, which is small, light, portable, compact and 55 site directions from the alignment axis of the inlet legs.
As a further feature, the nozzle inlet legs constitute
comparatively inexpensive to manufacture and which is
made of a minimum number of parts.
Another object of the invention is to provide in con
junction with a tank cleaning device a new and improved
swivel legs by which the axes of the discharge legs may
be adjusted about the alignment axis of the inlet legs.
braking device, which reduces the speed of a cleaning
[through the nozzles to be changed in relation to the plane
at right angles to the axis of rotation of the nozzles, and
device of the general reaction nozzle type described,
which does not generate excessive friction heat, which
This adjustment permits the planes of ?ow of the liquid
correspondingly reduces the reaction forces on the noz
does not wear out, and which occupies a minimum of
zles, so that those nozzles rotate about their axis at a
space.
lower speed, the extent of speed reduction depending on
A further object of the invention is to provide new 65 the extent of deviation of said planes of ?ow from the
and improved means whereby the speed of rotation of the
plane at right angles to the axis of rotation of the noz
nozzles about the two axes at right angles to each other
zles. When the nozzle discharge legs have been turned
may be easily and quickly adjusted.
90° from the plane at right angles to the axis of rotation
Another object of the invention is to provide new and
of
the nozzle, the components of reaction forces around
70
improved adjustable reaction nozzle means for a clean
said
axis will be zero.
ing device of the general dual axis type described de—
3,052,574
3
4
As a further feature, a gear connection is provided be
tween an adjusting member and both nozzle inlet swivel
FIG. 7 is a detail section of the cleaning device taken
along the lines 7-7 of FIG. 6;
FIG. 8 is a section of another form of cleaning device
embodying the present invention designed to be connect
ed to another cleaning device in series therewith;
legs to effect simultaneous adjustment of the nozzles in
response to the operation of said member, for the purpose
and in the manner described.
As another feature ofthe present invention, the flow of
FIG. 9 is a detail section showing part of FIG. 8 but
cleaning liquid- through the cleaning device is along the
axis of rotation of the housing or turret, and the cleaning
showing the cleaning device converted to be used singly;
FIG. 10 is a section of still another form of cleaning
device is constructed to permit a cleaning device which
device embodying the present invention, and taken on
is adapted to be employed singly to be modi?ed slightly 10 lines 10-10 of FIG. '11;
in accordance with a modi?cation, to permit a number
FIG. 11 is a section of the cleaning device taken on
of such cleaning devices to be interconnected in ?ow
lines 11-11 of FIG. v10;
series and operated from the same cleaning liquid cours
FIG. 12 is a diagram of the jet impingement stripe pat
ing through the devices in series. Such cleaning devices
tern generated by the cleaning device of the present in
with series ‘?ow connections are particularly useful in 15 vention on the tank wall surfaces to be cleaned;
cleaning deep tanks, where a single cleaning device cannot
FIG. 13 is a diagrammatic side view showing the clean
effectively clean all levels of the tank, or may be employed
ing device of the present invention in a tank to be cleaned,
to attain more concentrated cleaning action.
said device being shown oriented with the housing axis
Cleaning devices of the dual axis type described are com
of rotation vertical and the nozzle axis of rotation hori
monly operated with the axis of the housing or turret ex
zontal;
tending vertically and the nozzle axis extending horizon
FIG. 14 is a diagrammatic top plan view of the jet con
tally. ‘It has been determined in accordance with the
volutions generated by the cleaning device oriented in the
present invention, that a cleaning device so mounted, will
manner shown in FIG. 13 in an elongated tank;
in operation generate a helix comprising a series of suc
FIG. 15 is a diagrammatic side view showing the
cessive convolutions extending in vertical planes and ex 25 cleaning device of the present invention in a tank to be
tending substantially radially at equal angles apart in
cleaned, said device being shown oriented with the hous
relation to the housing or turret axis, when viewed in top
ing axis of rotation extending horizontally along the lon
elevation. The vertical planes of these jet convolutions
gitudinal direction of an elongated tank; and
intersecting the walls of the tank near the region midway
FIG. 16 is a vertical section of the tank of FIG. 15
between the ends of the tank in the vicinity of the cleaning 30 showing in end view elevation the jet convolutions gen
device will be comparatively close together.
The dis
erated by the cleaning device oriented in the elongated
tances between successive impingement stripe sections
tank in the manner shown in FIG. 15.
progressively increase as the ends of the tank are ap
Referring to the embodiment of the invention shown in
FIGS. 1—5 of the drawings, the cleaning device comprises
proached, so that in the vicinity of the ends of the tank,
the vertical planes of the jet convolutions, intersect the
walls of the tank along stripe areas far apart. The im
pingement of the jets against the tank walls at these re
mote tank regions are, therefore, along successive stripe
35 in general a turret 10 in the form of a housing for a clean
ing liquid conduit mounted to rotate about an axis A
and carrying a pair of nozzles 11 mounted to rotate with
the housing about said axis and mounted tov rotate simul
areas so far apart, as to preclude the possibility of elfec
taneously about an axis B at right angles to the axis A.
tive cleaning of the tank walls between these areas. It 40 FIG. 13 shows one way in which the cleaning device
has been found in accordance with the present inven~
may be supported or suspended in a tank C and operated
tion, that if the cleaning device has its housing or turret
to clean the tank. This operation will be described more
axis extending horizontally and along the length of the
tank, the nozzle rotating about its own axis and simul
fully hereinafter.
Referring to the construction of FIGS. 1-5 more in
taneously about the housing or turret axis, will generate 45 detail, the housing 10 comprises a peripheral wall 12
jet convolutions in substantially radial planes at equal
terminating at one end in a cylindrical hub 13.
angles apart in relation to the latter axis, when said
convolutions are viewed in side elevation along the length
of the tank and will ‘be parallel to the longitudinal center
line of the tank. These radial jet convolutions planes
will intersect the tank waf'l at spaced areas equally spaced
along the full length of the tank, so that the distances
between jet impingement stripe sections will be the same
along the full length of the tank, assuming that the clean
ing device is located in the transverse center of the tank,
but in any case the spacing between the stripe sections
will not vary as they will wtih the cleaning device mount
ed, with the housing axis vertical, thereby assuring effec
tive cleaning of even the remote end. regions of the tank.
Various other objects, features and advantages of the
invention are apparent from the. following description and
from the accompanying drawings, in which
FIG. 1 is a section of a form of cleaning device em
bodying the present invention, taken approximately along
Se
cured to the other end of the peripheral housing wall
12 by studs 14 is a cover plate 15 terminating in a
cylindrical hub 16 in axial alignment with the hub 13
50
along the housing axis A.
Supported in the housing
10 is a cleaning liquid conduit comprising a liquid dis
tributing chamber 17 in the form of a cylindrical sleeve
having a series of elongated openings 18 therein uni
formly distributed around its entire circumferential wall
to serve as flow passageways and screen openings for the
cleaning liquid in its course to the nozzles 11. This
sleeve 17 is ?xed to permit the housing 10 to rotate
thereabout and serves as a bearing for the two hubs 13
and 16 of said housing.
For that purpose, the sleeve
17 near one end has a circumferential ?ange 24} to seat
the cover plate 15 and has a cylindrical bearing 21 be
yond said ?ange for the housing hub 16. A bushing
22 of sealing material such‘ as glass impregnated Te?on
(tetra?uoroethylene resin) is interposed between the
the lines 1——1 of FIG. ‘2;
FIG. ‘2 is a section of‘ the cleaning device taken ap
housing cover plate 15 and the sleeve 17 in the region
proximately along the lines 2—-2 of FIG. 1;
'
FIG. 3 is a side elevation of the cleaning device shown
around said hub and to serve as a bearing.
partly in section;
FIG. 4 is a detail section of the cleaning device taken
on lines 4-4 of FIG. 3;
FIG. 5 is av fragmentary bottom plan view of the clean
ing device taken along the lines 5’_5' of FIG. 1;
'FIG. 6 is a fragmentary section of another form of
cleaning device embodying the present invention;
of the housing hub 16 to hermetically seal the housing
The other end of the sleeve 17 is externally reduced
to de?ne an annular shoulder to receive a washer 23
against which the hub 13 of the housing abuts and the
section 24 of‘ the sleeve beyond said washer serves as
a bearing for said hub. A bushing 25 of sealing ma
terial such as glass impregnated Teflon (tetra?uoroethyL
ene resin) is interposed between the housing 16‘ and
75 the sleeve 17 in the region of the housing hub 13 to
3,052,574
5
6
of the inlet legs 46. With the offsetting of the discharge
legs 47 from their respective inlet legs 46, the nozzles
become reactance nozzles in which the cleaning liquid
hermetically seal the housing around said hub and to
serve as a hearing.
The sleeve 17 is closed near one end by an imperforate
as it flows therethrough rotates these nozzles about the
axis B of the nozzles. The two discharge nozzle legs
wall 27 integral with the circumferential wall of the
sleeve and of conical shape tapering with concave curva 01
ture to a central pointed end to afford streamline flow
47 are turned to exert equal reactance forces on the two
nozzles 11 tending to rotate them in the same direction
about the axis B. For that purpose, when the nozzles
11 are mounted for maximum reactance, they extend
as shown in FIGS. 1-5, with the axes of their discharge
tube 30. This inlet tube St? has an external thread en
legs 47 in the same plane at right angles to the nozzle
gaging an internal thread at one end of the sleeve 17
axis B and with the two discharge legs turned in oppo
and this sleeve is provided with an internal annular
site directions. The two nozzles 11 may be turned from
shoulder 31 to seat and thereby limit the inlet tube in
this position of maximum reactance to change the di
its threaded engagement with the sleeve, thereby lock—
ing the sleeve and the tube together against relative ro 15 rections of their discharge legs 47 in relation to a plane
at right angles to the nozzle axis B, and to thereby re
tation. The outer end of the inlet tube St} has a head
duce the speed of the nozzles about said axis. The ad
32 externally enlarged in diameter to receive an hexagonal
justing means for this purpose will be described here
mounting nut 33 with an internal threaded bore 34 com
inafter.
municating with the interior of the sleeve 17 through
As the nozzles 11 rotate about their axis B, they drive
the tube 30 and has an external conical seat 35' en
the housing 10 about its axis A. The drive connection
gaging a corresponding internal conical seat 36 at one
for that purpose comprises a shaft 55 threaded on to the
end of the mounting nut to form a slippable connection
end wall 56 of the nozzle carrier 43 as to be rotated with
between said inlet tube and said mounting nut. An
the nozzles 11 about their axis B and extending along and
O-ring 37 in the mounting nut 33 engaging the head
32 of the inlet tube 30 seals the connection between 25 centered with respect to the nozzle axis B. Secured to
this shaft 55 is a worm 57 meshing with a worm wheel
the inlet tube and the mounting nut.
58 threaded onto and thereby a?ixed to the liquid distri
The mounting nut 33 is adapted to be attached to a
buting sleeve 17. Since the sleeve 17 is ?xed against
hose or pipe connection 38 (\FIG. 13) leading from
of the liquid towards the openings 18 of the sleeve as
said liquid reaches said wall 27. Locked to the other
end of the liquid distributing sleeve 17 is a liquid inlet
rotation while the liquid is coursing through the cleaning
a source of liquid supply and serving as a conduit for
device, the worm wheel 58 will also be ?xed and the worm
30
the liquid and may serve as a means for supporting
57 revolving about its axis as a result of the rotation of
or suspending the cleaning device in the tank C to be
the nozzles 11 about their axis B will, therefore, travel
around the worm wheel ‘58. Since the housing It} carries
the worm 57, the movement of the revolving worm about
cleaned. The conical seating connection 35 and 36 be
tween the inlet tube 30 and the mounting nut 33 per
mits the inlet tube 30 and therefore, the liquid distribut
ing sleeve 17 to be rotated in relation to the mounting
the ?xed worm wheel 58 will cause the housing to move
nut when no liquid is ?owing through the cleaning de
vice. This slippable connection between the mounting
of said housing.
with said worm wheel about the sleeve 17 and the axis A
As the nozzles 11 make one revolution about the axis B,
nut 33 and the inlet tube 30 is advantageous especially
during the mounting of the cleaning device to a hose
or pipe connection, since it prevents the sleeve 17 from
the worm '57 will make a corresponding revolution and
will, therefore, move along the worm wheel ‘58 the dist
ance equal to one tooth, two teeth, three teeth or four
being turned as a handle to lock the mounting nut onto
teeth, according to whether the worm is a single thread,
double thread, triple thread or a quadruple thread gear.
the hose or pipe connection and, therefore, prevents
the possibility of the gears to be described, forming part
If for example, the worm 57 is a single thread gear, then
the worm will travel along the worm wheel 58 a distance
equivalent to one tooth of said wheel when said worm
rotates one revolution about its axis. Therefore, if the
worm wheel 58 has m number of teeth, the worm 57
if provided with a single thread, will make m‘ number of
of the drive connection between the nozzles 11 and the
housing 10 from being stripped.
However, when the
liquid supply is turned on, and the cleaning device is
in operation, the pressure of the liquid acting on the
stationary mounting nut 33 and the inlet tube 30 tend
ing to separate them axially, presses them together at
their conical seats '35 and 36 and, therefore, holds the
tube and consequently the liquid distributing sleeve 17
connected thereto stationary.
The housing 10 on one side of the liquid distributing
revolutions before returning to its starting point on the
worm ‘wheel. Translating this relationship into terms of
actual operation, it means that when the housing 10
makes one complete revolution about its axis A, the
nozzles 11 will make m number of revolutions about their
axis B. Therefore, each nozzle 1?. will generate a number
of successive jet impingement stripes on the tank walls
corresponding to the number of teeth on the wormv wheel
58, starting from one wall section and returning to the
‘same wall section for each turn of the housing 10 about
sleeve 17 de?nes a chamber or passageway 40‘ along
the axis B of the nozzles 11 in communication with
the interior of said sleeve through the screen openings
18. This housing chamber 4% leads to the nozzles 11
and terminates at one end in a cylindrical bearing 4:.
for the hub 42 of a nozzle carrier 43 separated from
said hearing by a suitable bearing bushing 44 made, 60 its axis A. Each nozzle 11, therefore, projects a high
velocity cleaning jet against the tank walls following a
for example, of glass impregnated Te?on or graphite.
The nozzle carrier 43 is in the form of a T-tube hav
ing the hub 42 de?ning the eye of the nozzle and two
cross arms 45- extending in radially opposite directions
therefrom to receive the nozzles 11 respectively.
65
The nozzle device comprises two identical U-shaped
nozzles 11, each having an inlet leg 46 threaded onto a
corresponding cross arm 45 of the nozzle carrier 43
and a discharge leg 47 to which is threaded a nozzle
tip 48 having an insert 50 of ?uted internal construc
tion to serve as a stream straightener.
The two inlet
legs 46 of the nozzles 11 extend in radially opposite
helical impingement stripe pattern through one cleaning
cycle around the top, side and bottom tank wall for each
turn of the housing 10‘ about the axis A of said housing.
At the end of the ?rst washing cycle corresponding to one
turn of the housing 10 about its axis A, the last jet im
pingment stripe on a wall surface will be in phase with
the ?rst stripe on said surface, so that if the washing is
continued, at the beginning of the second cycle, the ?rst
70 jet impingement of said second cycle will register and be
superimposed on the first jet impingement stripe of the
?rst cycle and all successive jet impingement stripes
of the second cycle will register with ‘and be superimposed
aligned directions in relation to the nozzle axis B and
on the successive impingement stripes respectively of the
the two discharge legs 47 of the nozzles extend with
their axes substantially parallel to the alignment axis 75 ?rst cycle. As a result, for successive washing cycles
3,052,574
7
8
through successive turns of the housing 16 about its axis
opposite directions, the cycles described are effected in
A, the same stripe areas of the tank walls will receive
direct jet impingement, while the intervening areas must
depend on run downs of the liquid from the direct jet
duplicates with simultaneous jet impingements on oppo
impingement areas for cleaning, unless the level of the
high to eifect thorough cleaning. To reduce the speed
cleaning device is changed.
site sides ‘of the tank walls.
The reactance nozzles 11 will be driven at a speed too
the worm 5'7 and the worm wheel 5% are designed to pro
of the nozzles 11, a liquid braking or damping device is
employed. This brake device comprises in general a
brake member of irregular contour, that is a contour aside
duce for successive turns of the housing 10 about the
rorn cylindrical, conical or that having a circular cross
In accordance with a feature of the present invention,
axis A successive washing cycles which are phasically 10 section throughout its axial length, immersed in a body
offset, so that the jet impingement stripe pattern generated
of damping or braking liquid. A connection from the
during each washing cycle is phasically offset from the
nozzles 11 causes the body of braking liquid and the brake
jet impingement stripe pattern generated during the next
preceding washing cycle. This relationship between the
jet impingement stripe patterns of successive cycles is
member to rotate relatively as the nozzles rotate, and the
resistance created by this relative rotation slows down
the rotation of the nozzles 11 about the axis 13 and there
by also slows down the rotation of the housing 16 about
its axis A.
More speci?cally, the worm 5'7 forms an integral part of
a ‘casing or drum 65 of cylindrical shape forming an in
attained in accordance with the present invention by em
ploying a multiple thread worm 57 and by employing a
worm gear 58 with a number of teeth which when di
vided by the number of threads in the worm produces a
mixed number and not a whole number. This relation 20 tegral axial continuation of the nozzle shaft 55 so as to ro
ship requires m/n to be a mixed number, where m is the
tate therewith. The rear end of the drum 65 is journalled
number of teeth in the worm gear 58, and n is the number
in a bearing 66 forming part of the peripheral wall 12 of
of threads in the worm 57 but more than one. ‘For ex
the housing 7.9 and separated therefrom ‘by a bushing 67
ample, the worm 57 may be a double thread worm, and
of suitable bearing and sealing material, such as glass im
the worm wheel 58 will have an odd number of teeth, so 25 pregnated Te?on.
that the quotient of these numbers will be a mixed number
The rear end of the drum 65 is closed by a cap 68
consisting of a whole number and a fraction of one-half.
threaded thereon and provided with holes 74) to receive a
More speci?cally, in the speci?c example of the cleaning
device illustrated, the worm wheel 58 has 41 teeth and
the worm “57 is a double thread gear.
turning tool for assembly. The drum 65 sealably encloses
a body '71 of viscous liquid such as a viscous liquid grease
FIG. 13 illustrates 30 rotating with the drum as it is driven by the nozzles 11
the jet impingement pattern generated with this speci?c
teeth and thread relationship of the intermeshing gears
57 and 58. In this diagram of FIG. 13, the stripes are
shown horizontal only for purposes of illustration but
may extend in any direction. Moreover the directions of
each nozzle at the beginning and end of the cycles are
about the axis B. Immersed in the body 71 of viscous
liquid is a brake member 72 presenting a series of brak
ing surfaces extending laterally of its axis of rotation and
adapted to shear through the body of viscous liquid in
the ‘ rum 65. in the speci?c form shown, the brake mem
er '72 is in the form of a worm and these braking or
shown extending vertically but these directions represent
the directions of the nozzles about the housing axis A,
shearing surfaces constitute the helical faces of the
the ?rst stripe at one region and returning to the vicinity
of said region with the 21st stripe. The twenty-second
stripe, however, does not coincide with the ?rst stripe
of the ?rst cycle but will cut midway between the ?rst
and second stripe, and all succeeding stripes will be
similarly phasically offset in relation to the other stripes
of the ?rst cycle. At the end of the second washing
cycle, the last impingement stripe of said cycle Will be in
phase with the ?rst impingement stripe of the ?rst cycle,
so that the next impingement stripe at the beginning of
the third cycle will coincide with the ?rst impingement
housing lit? by studs 77. An O-ring 78 between the spin
worm. This worm '72 is held against rotation in relation
transverse to the direction of the nozzle about its axis B.
to the housing 10 and for that purpose has integral or
40
It can be seen from this illustration of FIG. 13 that for
otherwise rigid therewith at one end an axle 73 supported
the ?rst washing cycle during the ?rst turn of the housing
in an end wall 74 of the drum 65 with a snug bearing ?t
lit about its axis A, each nozzle will make twenty and one
and has at the other end a spindle 75 passing through the
half (2.01/2) turns about its axis B and will generate 20
cap 68 with a snug ?t and threaded into a fastening strap
jet impingement stripes on the tank walls starting with
75 secured at its ends to the peripheral wall 12 of the
stripe of the ?rst cycle and the impingement stripes during
this third cycle will register with and be superimposed
upon the impingement stripes of the ?rst cycle. There
fore, with the speci?c worm and worm wheel design
described, the jet impingement stripes of each cycle will be
phasically offset from the jet impingement stripes of
the preceding cycle, and the jet impingement stripe pat
terns will repeat themselves for every other turn of the
housing 1'0 about its axis A. As a result of this jet im
pingement pattern, the cleaning device may be employed
for only one cycle corresponding to one turn of the
housing 10 about its axis A, to attain rough coverage of
the wall from top to bottom and the cleaning device may
be continued for a second cycle during which the wall
dle 75 and the cap 68 prevents leakage along said spin—
dle and the strap 76 serves not only to lock the brake
Worm 72 against rotation relative to the housing 10 but
also serves to prevent the cap from accidentally unscrew—
ing from the drum 65.
The axle 73 and spindle 75 are on a common axis coin
cident with the axis B of the nozzles 11 and that of the
drum 65 and as the drum rotates with the nozzles 11 about
the axis B, the viscous brake liquid '71 rotates with the
drum about the axis B and around the brake worm 72
held against rotation about the axis B. The friction be
tween the brake liquid 71 and the ‘brake worm 72 result
ing from this action and the effects of inertia on the brake
liquid create resistances which slow down the rotation of
the nozzles 11 about the axis B and also thereby the rota
tion of the housing It) about its axis A.
In order to apply the maximum retarding force on the
nozzles 11 and at the same time create by the feed action
of the brake Worm 72 pressure on the brake liquid 71
“ tending to move the drum 65 forward towards the nozzles
11, the threads on the brake worm are of high pitch.
The thread on the brake worm 72 is slanted in the right
direction to eifect this pressure action, and this action
presses the cap 68 against the bearing bushing 67 and
areas between the previously jet impinged areas are 70 thereby assures a ‘sealing ?t against the escape of cleaning
directly impinged by the jets, thereby assuring a more
thorough wall coverage during the second cycle. Of
liquid along said hearing.
course, the cleaning can be continued beyond the second
to the proper degree to produce the retarding e?’ect de—
sired, but a worm having a single thread of high pitch
cycle according to the extent of cleaning required.
A single thread on the brake worm 72 could be pitched
Since there are two nozzles 11 directing streams in 75 will have too much brake inactive space ‘between succes
3,052,574
9
sive thread convolutions and this might require a longer
brake worm. It is, therefore, desirable to make the brake
worm 72 of multiple threads, and in the speci?c example,
a brake worm having four threads is considered suitable.
The drawings show a brake worm 72 having a double
thread merely to simplify illustration.
The pressure of the cleaning liquid acting mainly against
the end wall 56 of the nozzle carrier 43 tends to move the
nozzles 11 outwardly along the axis B but this is coun
1%
said axis is zero. That is, of course, the limit of adjust
ment, and since in this position, the two discharge legs
47 are in alignment, adjustments are made short of this
limiting position. That is (why the ‘active gear angle be
tween the gears 85 and 37 is limited to 90°. Any adjust
ment beyond 90° would cause the nozzles 11 to rotate in
the opposite directions ‘from that for which they were de
signed and would cause thereby parts of the cleaning de
vice to become unscrewed.
For cleaning operations, the cleaning device may be
teracted by the pressure of the cleaning liquid on the drum 10
suspended or supported with the housing axis A vertical,
65 acting in the opposite direction. The relative areas
exposed to these pressures are about equalized but the
pressures created by the action of the brake worm 72
on the braking liquid 71 tends to move the drum 65 in
as shown in FIG. 13, or maybe suspended or supported
with the housing axis A horizontal, as shown in FIG.
15. Where the cleaning device may be suspended or
the direction to tighten the sealing effected by the bush— 15 supported with the housing axis A vertical, the center
of gravity of the nozzle unit, although displaced from the
ing 67, as already described.
It should be noted that the brake drum 65 is enclosed
inside the housing, thereby lending compactness to the
cleaning device and is in the path of the cleaning liquid
vertical axis A, ‘will remain substantially in the same
‘horizontal plane as the nozzle unit revolves about said
axis.
No signi?cant gravity complications, therefore,
on its way from the chamber 17 to the nozzles 11, there 20 will ensue when the device ‘is so suspended or supported.
However, where the cleaning device is suspended or sup
by utilizing this cleaning liquid to carry away the heat
ported with the housing axis A horizontal, as shown in
from said drum generated by the braking action and
FIG. 15, the center of gravity of the nozzle unit will travel
cooling said brake drum.
in a substantially vertical plane about the axis A of the
The damping effect of the brake device is somewhat
constant but the operating pressures may vary or the 25 housing, so that signi?cant gravity complications may
ensue for heavy cleaning devices, or for devices in which
conditions may be such requiring selective controls of
the distances between the axis A and B are large, and
the speed of the nozzles 11 about the two axes A and B.
these complications may cause the speed of the nozzle
For that reason, there is provided means for adjusting the
unit about the axis A to vary as said unit moves about
angularity of the nozzles for controlling thereby the reac
tion effect of the ‘cleaning water thereon. To that end, 30 said axis. To counteract ‘the effect of gravity under
these conditions, a counterweight may be applied to the
the inlet leg 46 of each nozzle 11 has integral or other
construction of FIGS. l-5. To that end, the peripheral
wise rigid therewith a segmental bevel gear 85 extending
wall 12 of the housing 11} has a pair of radial lugs 92 ex
only around 90°. The nozzle carrier 43 has an axle 86
integral or otherwise rigid therewith projecting axially
tending to the bearing section 2.4 of the liquid distributing
therefrom and supporting for adjustment thereabout an 35 sleeve 17. A container 93 may be secured to the periph
eral wall 12 of the housing 19 by means of tWo studs 94
adjusting bevel gear 87 meshing with the two bevel gears
threaded into said peripheral wall and the lugs 92 re
85 on the two inlet legs 46 of the two nozzles. The bevel
spectively and by two of the cover plate studs 14. The
gear 87 need not extend the full 360° but is mutilated at
container 93 contains weights such as small shots and
the sides to provide two similar opposed gear segments 88,
each meshing with a corresponding bevel gear 85 and 40 has a removable cover 95 to permit the amount of said
weights to be selectively varied. The container 93 with
each extending along an angle only su?icient to mesh
its weights is on the side of the axis A of the housing
with the bevel gear 85 through a 90° turn of the latter
bevel gear.
A wing nut 90 threaded on the outer end of the axle
85 locks the gear 87 in adjusted position.
When the two nozzles 11 are turned in the position
shown in the drawing, they are subjected to maximum re—
actions of equal forces from the cleaning liquid passing
therethrough. In this position, the two discharge legs
47 of the nozzles 11 are turned in opposite directions
with their axes in a plane of maximum reaction at right
substantially diametrically opposite of the nozzle unit
to serve as a counterweight to counterbalance the effect
of gravity on said nozzle unit as it revolves vertically
about said axis.
FIGS. 6 and 7 show a modi?ed form of cleaning de
vice in which the braking or damping member instead
of being in the form of a brake worm as in the construc
tion of FIGS. 1-5 is in the form of a solid diametrically
elongated member 72a tapering symmetrically towards
angles to the axis B of rotation ‘of the nozzles. When
diametrically opposite ends 99 and bounded by opposite
it is desired to reduce the speed of the nozzles 11, the
similarly convexly curved surfaces 1%. This brake mem~
wing nut 91) is loosened and one of the nozzles 11 is
ber 72a may replace the brake worm '72 of FIGS. l-5,
turned about the axis of its inlet leg 46 to bring its dis 55 the constructions remaining otherwise exactly as shown
charge leg 47 forward of the plane of maximum react
in FIGS. l-S. However, in FIGS. 6 and 7, a modi?ca
ance at right angles to the axis B of rotation of the noz
tion is shown in which the nozzle shaft 55a extends be
zles This turning of the nozzle 11 through a selected
yond the housing 16a to form integral therewith a cas
angle unscrews said nozzle from the nozzle carrier 43 60
ing or drum 65a closed by a cap 68a having holes 79a
and turns the adjusting bevel gear 87 meshing with its
to receive a turning tool for assembly, and is supported
bevel gear 85, causing the other nozzle 11 to turn through
by a bearing 1111 in the housing through a bushing 102,
the same angle forwardly of the plane of maximum react
made for example, from glass impregnated Te?on. The
ance at right angles to the axis B of rotation of the noz
zles. In this manner, the two nozzles 11 are adjusted 65 brake member 72a is enclosed in a body of viscous liquid
71a in the drum 65a and has a spindle 75a passing through
simultaneously through the same angle by a single ad
the cap 68a with a snug bearing ?t and threaded into
justing manipulation and the reactances on the two ad
the end Wall of a cover 1113 enclosing the drum 65a and
justed nozzles are automatically maintained equal. The
rigidly secured to the housing, as for example, by studs
two nozzles can then be locked in adjusted positions by
(not shown). A retaining seal i104 and O-ring ‘165 pre
means of the wing nut 90.
70 vent leakage of the brake liquid from the drum 65a and
When the two nozzles 11 are turned so that their dis
holes 106 in the cover 1113 serve to drain any cleaning
charge legs 47 extend forward at right angles to the plane
liquid that may leak into said cover from the chamber
of maximum reactance at right angles to the axis B of
around the worm 57a.
rotation of the nozzles after an adjustment of 90°, the
component of reaction tending to rotate the nozzles about 75 The inner surface 197 of the peripheral wall of the
3,052,574
11
1.2
drum 65a is fluted to assure rotation of the body of brake
liquid 7111 with the brake drum 65a.
The pressure of the cleaning liquid acting in direc
tions along the axis B of the nozzles (not shown) simi
lar to the nozzles 11 in the construction of FIGS. l—5,
and 1%, so that the streams projected from the nozzles
of the two cleaning devices do not interfere. For that
purpose, they may be set so that the two nozzle units
of the two cleaning devices are diametrically opposite the
axis A of rotation of the housings. Since the two clean
has a resultant acting along said axis in a direction to
ing devices are operated at independent speeds depend
press the nozzles outwardly along said axis, causing an
ing on the pressures of the cleaning liquid in the two
cleaning devices and the setting of the angles of the
a shoulder 1139 at the end of the bearing 101 through
nozzles with respect to the axis B of rotation, this setting
the ‘bushing 1M. to assure hermetic sealing of the cham 10 of the two cleaning devices may change as cleaning
ber de?ned by the housing 19a around the nozzle shaft
progresses. However, this condition would not adversely
55a.
affect the cleaning operation, since any stream interfer
In the construction of FIGS. 1-5, the flow of the clean
ences would be of short duration as long as the speeds
ing liquid is along the axis A of rotation of the housing
of the two cleaning devices are different.
It} in the liquid distributing sleeve 17 and is diverted by
With the cleaning device of FIG. 8, it may be desired
annular shoulder 1% on the drum 65a to press against
the closure wall 27 therein radially outwardly through
sometimes to employ the cleaning device singly instead
the openings 18 and towards the nozzles 11.
of as part of a series or it may be desired to employ the
One fea
ture of this location of the liquid distributing sleeve 17
cleaning device of FIG. 8 as the bottom device of the
along the axis A of ‘the housing 10 is that by eliminating
series. It is a simple matter for that purpose, to remove
this closure wall 27 so that the liquid distributing sleeve 20 the coupling collar 110 and replace it by a plug 116 as
17 is open at both ends and by providing means ‘for at
shown in FIG. 9, having a sleeve closure wall 271)
shaped like the wall 27 in the construction of FIGS. 1-5.
The cleaning device so plugged, will operate like the
taching a second cleaning device to the discharge end of
this sleeve, a number of these cleaning devices may be
connected together in series to effect quick and/ or more
concentrated cleaning action or where the tank is deep, 25
to locate two or more cleaning devices at different levels
of the tank to assure effective cleaning of the tanks at
all levels. With the cleaning devices constructed as de
scribed and coupled together in series, the cleaning liquid
coursing through the cleaning devices along the axis A of
rotation of their housings does not lose substantial pres
sure head between the cleaning devices.
FIGS. 8 and 9 show a modi?ed construction for carry
ing out the objects described. In this modi?ed construc
tion, the liquid distributing sleeve 17b corresponding to
the sleeve 17 in the construction of FIGS. 1—5, is open at
its discharge end to provide a liquid distributing sleeve
which is clear through from one end of the housing 165
to the other along its axis of rotation A. The discharge
end of the sleeve 17!) is internally threaded to receive a
coupling collar 110‘ having a neck 111 externally thread
ed to permit it to be screwed into said sleeve and having
an externally threaded head 11?. de?ning an axially facing
shoulder 113 adapted to engage a spacer 114 between
the ends of said sleeve and the housing ltlb on the one
side and said shoulder on the other side. The coupling
collar 110* is locked to the sleeve 17b so that in opera
tion, said collar remains stationary with said sleeve, and
does not bear against the spacer 114 with su?cicient pres
sure to prevent rotation of the housing 10 about the axis ‘
A. In all other respects, the cleaning device of FIG. 8
is the same as that of FIGS. 1-5.
In assembling two or more cleaning devices together in
series, the coupling collar 11% of the upper cleaning
device is screwed into the mounting nut 33 of the lower
cleaning device as shown in FIG. 8. This lower cleaning
device would be constructed exactly as shown in FIGS.
1-5 with a liquid distributing sleeve 17 closed at its dis
charge end by the wall 27 formed integrally therewith or
may be as shown in FIG. 8, where a third cleaning device
is to be added in series to the other two cleaning devices.
In FIG. 8, the mounting nut 33 of the lower cleaning
device is shown screwed directly onto the coupling collar
110 so that the two cleaning devices are close together
for concentrated cleaning. However, very often, it is
required to have the [lower cleaning device at a sub
stantial distance below the upper cleaning device to reach
di?erent levels of a deep tank. For that purpose, a long
construction of FIGS. 1-5.
In the construction of FIGS. 1-5, the worm and worm
wheel drive connection 57, 58 between the nozzle shaft
55 and the housing 1% is exposed to the cleaning liquid
as it ?ows from the liquid distributing sleeve 17‘ through
the holes 18, through the passageway 40 and towards the
nozzles 11. If the cleaning liquid is not of the extremely
destructive or corrosive type, but is for example, plain
water, the exposure of the gear transmission ‘57 and 58
thereto is not serious. Moreover, the worm 57 and worm
wheel 58 may be made of nylon and the other parts of
' the cleaning device may be made of materials such as
aluminum and/ or brass, to withstand the corrosion action
of the cleaning liquid. However, in spite of these safe
guards, due to the highly corrosive nature of the cleaning
liquid which might be used, or because this liquid may
contain abrasive materials such as sand, it may be de
sirable to protect the worm and worm wheel drive con
nection from the action of the cleaning liquid by protec
tively housing this connection against contact with the
cleaning liquid as said (liquid flows through the cleaning
device. FIGS. 10 and 11 show a modi?ed construction
for that purpose.
In the construction of FIGS. 10V and 11, the housing
100 comprises a base wall 120' and an upstanding wall
121 integral therewith and extending across the housing.
Side walls 122 and 123 integral or othewise rigid with
the base housing wall 120, serve to form with the up
standing housing wall 121 and with said base wall a
chamber comprising two adjoining compartments 124
and 125, the compartment 124 being generally cylindrical
to receive concentrical therewith the worm wheel 58c,
the other compartment 125 being shaped to receive the
worm 57c, each of the two compartments ‘being closed
on all sides except for a passageway 126 therebetween
where these gears intermesh. A cover 127 is connected
to the housing 100, this cover having a base plate 128
seated on the top of the walls 121, 122 and 123 and
secured to said walls 122 and 123 by means of studs
129. This bases plate 128 closes entirely the chamber
compartment 125 and close entirely the cylindrical cham
ber compartment 124, except for an opening 130‘ in said
base plate surrounded by a bearing hub extension 131
integral with said base plate and extending into the
cylindrical chamber 124 coaxially therewith. This cover
hose or pipe connection, preferably straight, is provided
127 is also formed with a chamber 132 above the base
between coupling collar 116 of the upper cleaning device 70 plate 128 separated entirely from the two chamber com
and the mounting nut 33 of the lower cleaning device.
partments 124 and 125 and serving as a ?ow passageway
When two cleaning devices are connected in series as
for the cleaning liquid from the inlet of the cleaning
described, the nozzles ‘of the two devices are set relatively
device to the nozzles 11.
about the aligned axes A of rotation of their housings 10 75
An end section 133 of the housing walls 122 and 123
3,052,574
13
forms with an end section 134 of the cover 127 a bearing
for a nozzle carrier 430 similar to the nozzle carrier 43
in the construction of FIGS. 1-5, this hearing being sep
arated from said carrier by a bushing 44c, as for ex
ample of glass impregnated Te?on. A shaft 550 secured
to the nozzle carrier 430 for rotation therewith, passes
through the housing wall 121 with a snug rotative ?t, is
supported in a bearing 135 in said wall and is sealed by
O-rings 136 in said wall. The shaft 550 extends into the
chamber compartment 125 and is dampened in the man 10
ner described in connection with the construction of
FIGS. 1-5 by a braking mechanism comprising a cylin
drical casing or drum 650 in the chamber compartment
125 forming the body of the worm 57c and forming also
an integral axial continuation of the nozzle shaft 550, so 15
as to rotate therewith.
The rear end of the drum 650 is
14
‘
supported at any desired level in the tank by a cable or
rope ‘152. The cleaning device is shown in FIG. 13 sup
ported in the tank with the housing axis A vertical and
the nozzle axis B horizontal, and as the water ?ows
through the nozzles 11, they rotate about the axis B by
the reaction created and at the same time, the housing 10
carrying the nozzles rotates about the housing axis A
causing the nozzles to turn also about the axis A. The
speci?c gearing ratio as described is such, that for every
complete revolution of the nozzles 11 about its horizon
tal axis B, the housing 10 with the nozzles 11 will turn
about the vertical axis A a fraction of a revolution corre
sponding to 2/11 of 360° or about 17.56°. Therefore, for
every complete revolution of the housing 10 about the
vertical axis A, carrying the nozzle \11 with it, the nozzles
make 201/2 revolutions about its horizontal axis B.
The mounting of the cleaning device in the position
journalled in a bearing 137 and is closed by a cap 680
shown in FIG. 13 will cause each nozzle to generate a
threaded therein and provided with holes 700 to receive a
helical stream having convolutions D, which are substan
turning tool for assembly. The drum 65c sealably en
closes a body 710 of viscous liquid in which is immersed 20 tially in vertical planes and which when observed in top
plan view, as shown in FIG. 14, will extend substantially
the brake worm 720. This brake worm 720 is ?xed against
radially from a center region spaced equal angular dis
rotation with the drum 650 by a spindle 75c which forms
tances apart 2/11 of 360°. In FIG. 14, for the sake of
an axial core extension of said brake worm, which passes
simplicity in illustration, only one-half of each stream
through the cap 68c with a snug rotative ?t and which is
threaded into a ?xed plate 760 rigidly secured to the hous 25 convolution is shown and these convolutions are shown
to radiate from a single point. Actually, the center from
ing 100 by studs (not shown).
which the stream convolutions radiate moves about a
The housing cover 127 has a bearing hub 140, which is
center on the axis A, since the vertical plane of the
coaxial with the cylindrical chamber 124 and with the
nozzle is spaced from the vertical axis A of the housing
bearing hub 131 and which embraces a liquid distributing
cylindrical sleeve 17c with a bearing ?t sealed by an O 30 10. However, the distance between this axis A and the
plane of the nozzle is small enough compared with the
ring 141. The sleeve 170 has integral therewith at one
end a mounting nut 33c or may be connected to the mount
ing nut through a bevel seated collar as in the construction
of FIGS. l-S, and extends into the chamber 132 de?ned
size of the tank, to permit disregarding this distance for
the purpose of illustrating certain principles to be dis
cussed.
For cleaning a tank having a vertical depth or horizon
by the cover 127. A series of elongated openings 180 in 35
tal width, which is greater than its length or which at
the sleeve 17c serve as ?ow passageways for the cleaning
least is not very much smaller than its length, the mount
liquid from the sleeve towards the nozzles 110. A closure
ing of the cleaning device in the manner shown in FIG.
wall 27c at one end of the sleeve 17c integral therewith
13, is suitable. However, where the tank is comparatively
and shaped like the closure wall 27 in the construction of
FIGS. l—5 for streamline de?ection of the liquid towards 40 long horizontally in relation to its vertical height or hori
zontal width, then the cleaning pattern generated by each
the openings 180 is seated on the base cover plate 127
nozzle shown in FIG. 14 may not be suitable. It will be
over the bearing hub 131 thereof and an axle integral ex
noted from the jet impingement pattern illustrated in
tension 143 of the sleeve coaxial with the sleeve 17c
FIG. 14, considering only, for example, a wall section
passes through the bearing hub 131 with a snug bearing
?t sealed by O-rings 144 and extends into the cylindrical 45 155 along its length, that the distances between successive
chamber compartment 124. The lower end of the axle
sleeve extension 143 is supported in a bearing 145 in the
jet impingement stripes therealong indicated by the dis
the result of the reaction created by the How of the
cleaning liquid through the nozzles. The rotation of the
sides thereof, but not necessarily midway ‘between the top
tances a, b, c, d, etc., increase progressively as the stream
convolutions D approach the ends of the tank. The dis
lower housing base wall 120. The Worm wheel 580 is
tances, therefore between successive j'et impingement
threaded onto the axle extension 143 and against a
shoulder 146 on said axle extension through a gasket 147, 50 stripes near the remote end sections of the tank wall may
be too far apart to assure e?ective cleaning in these re
so as to be ?xed against rotation relative to the housing
mote sections.
10a. This worm wheel 580 from the chamber compart
It has been determined in accordance with the present
ment 124 extends through the passageway 126 to mesh
invention, that this drawback in the cleaning of hori
with the worm 570 in the chamber compartment 125.
zontally elongated tanks can be remedied by simply turn
Except as described, the construction of FIGS. ‘10 and 55 ing the cleaning device 90°, so that the axis A of the
11 is the same as that of FIGS. 1-5 and operates in a
housing 10 extends horizontally along the longitudinal
similar way. The nozzles 11 rotate about the axis B as
direction of the tank substantially midway between the
nozzles 11 causes at the same time the rotation of the
housing 10c about the ?xed liquid distributing sleeve 170
by means of the worm 57c and worm wheel 58c, and there
and bottom thereof. FIG. 15 shows the mounting of the
cleaning device, such as that of FIGS. 1—5 but with its
housing axis A extending horizontally along the longi
tudinal direction of a long tank C. For that purpose,
by about the housing axis A at right angles to the nozzle
the vertical supply pipe or hose 38 has a 90° elbow 156
axis B.
65 to connect into the mounting nut 33 through a horizontal
FIG. 13 shows a cleaning device of the present inven
nipple. With the cleaning device mounted as shown in
tion supported in the tank Oto clean the walls of the tank.
FIG. 15, each nozzle will generate a helical stream having
In this arrangement, the cleaning device is illustrated as
convolutions D’, which are approximately in planes
being speci?cally of the type shown in FIGS. 1—5, al
extending radially from a center region when observed in
though the other forms of cleaning devices shown can be
end elevation looking horizontally along the longitudinal
similarly supported. In the arrangement shown in FIG.
direction of the tank towards one end thereof, as shown
13, a vertical supply pipe or a hose 38 for the cleaning
in the jet impingement pattern illustrated in FIG. 16
liquid, such as water, is connected to the mounting nut
and spaced equal angular distances apart (2/r1><360°).
'33 of the cleaning device, and lowered through a man
As in the jet impingement pattern illustrated in FIG. 14,
hole or opening 151 in the tank and the device may be 75 FIG. 16 for the sake of simplicity shows only half of each
3,052,574
16
stream convolution, and the stream convolutions are
in claim 1, wherein said brake member is in the form of
shown to‘ radiate from a single point, when as a matter
a
of fact, the planes of these convolutions would be
Worm.
"
'
‘
'
tangent to a circle centered about the horizontal axis A
3. A device for cleaning the walls of a tank as described
in claim 1, wherein said=brake member has a contour
of the housing. However, because the diameter of the
circle is small compared to the size of the tank C, the
diametrically elongated vin opposite directions from an
axis and tapering towards diametrically opposite ends.
planes of the convolutions are assumed to radiate from
4. A device for cleaning the walls of a tank as described
a single point.
in claim 1, wherein the means for rotating the nozzle about
It will be noted from the jet impingement pattern of
said second axis consists of a discharge leg on the nozzle
FIG. 16, considering for example, a peripheral wall section 10 turned in relation to the rest of the nozzle to receive the
157 of the tank C, that the distances between successive
reaction of the cleaning liquid as it is discharged from
jet impingement stripes therealong indicated by the dis
said leg as a high velocity jet.
tances a’, b’, c’, d’ etc. are equal and these distances
5. A device for cleaning the walls of a tank, compris
between stripes remain the same for the entire length of
ing a cleaning liquid conduit having ‘an inlet and an out
the tank C. Therefore, the ends of the tank, even though
let, a housing for said conduit, means supporting said
remote from the center of the tank where the cleaning
housing for rotation about a ?rst ‘axis, a reaction nozzle
device is located, will be cleaned effectively.
supported on said housing for rotation with said housing
Also, it should be noted from the jet impingement stripe
about said vaxis and for rotation about a second axis sub
pattern of FIG. 16, that ‘by placing the cleaning device
stantially at night angles to said ?rst axis, said nozzle
offset from the center position shown, so that it will be 20 being connected to the outlet side of said conduit to re
closer to one peripheral wall section of the tank than
ceive the cleaning liquid therefrom and to project the
it will be from the diametrically opposite peripheral wall
section of the tank, the distances between the jet impinge
ment stripes at said closer wall section will be closer
together than they will be at this diametrically opposite
section, thereby effecting more thorough and concentrated
cleaning at’ said closer wall section. This feature of the
jet impingement stripe pattern with the axis of the hous
ing A extending along the longitudinal direction of the
cleaning ‘liquid from said nozzle as a high velocity jet
while said nozzle is rotated by the reaction of the liquid
passing therethrough, a shaft connected to said nozzle
along said second axis for rotation with said nozzle about
said second axis, and supported on said housing to cause
it to ‘revolve with said housing about said ?rst axis, a gear
drive between said shaft and said housing rotating said
housing about said ?rst axis as said nozzle rotates about
tank is, therefore, also useful, where certain peripheral 30 said second axis, and a liquid braking means for retarding
the speeds of rotations of said housing and said nozzle
wall areas require more thorough cleaning than other
about said axes respectively and comprising a drum mem
peripheral Wall areas. For example, the bottom of the
ber coaxial with 'said shaft and containing a braking
tank where most of the sediment collects may be stubborn
liquid thereinpand a brake member immersed in said
in its resistance to cleaning. A cleaning device located
braking liquid and coaxial with said shaft, said brake
‘so that it is closer to the bottom of‘ the tank than it is to
member having a contour resisting relative rotation of
the top of the tank and arranged so that the axis A of
the housing 10 is horizontal and extends along the longi
tudinal direction of the tank will perform the necessary
cleaning.
'
'
While the invention has been described with particular
reference to speci?c embodiments, it is to be understood
that it is not to be limited thereto, but is to be construed
broadly and restricted solely by the scope of the appended
claims.
'
‘
'
What is claimed is:
l. A device for cleaning the walls of a tank, comprising
a cleaning liquid conduit having an inlet and an outlet,
a turret supporting said conduit, means supporting said
turret for rotation about a ?rst axis, a nozzle supported
on said turret for rotation with said turret about said axis
and for rotation about a second axis substantially at right
angles to said ?rst axis, said nozzle being connected to
the outlet side of said conduit‘ to receive the cleaning
liquid therefrom and to project the cleaning liquid from
said nozzle as a high velocity jet, means for rotating said
nozzle about said second axis by the energy of the clean
ing liquid passing through the nozzle, means automatically
operable as said nozzle rotates about said second axis for
simultaneously rotating said turret about said ?rst axis,
and ‘liquid braking means for retarding the speeds of
rotation of said turret and said nozzle about said axes
respectively, comprising a drum member containing a
braking liquid aside from the cleaning liquid, a brake
the braking liquid and the brake member, one of said
members being connected to said shaft for rotation there
with, while the other member is secured to said housing
against rotation relative thereto.
' 6. A device for cleaning the walls of the tank, as de
scribed in ‘claim 5, wherein said drum member is cylin
drical and is rigidly connected to said shaft and the other
member is rigidly connected to vsaid housing.
7. A device for cleaning the walls of a tank as de—
scribed in claim 5, wherein said gear drive comprises a
worm secured to said shaft‘ ‘and coaxial therewith for rc
tation therewith, a worm wheel coaxial with said ?rst
axis and meshing with said worm, ‘and means ?xing said
worm wheel against rotation about said ?rst axis, whereby
as said worm rotates it travels along said worm wheel
causing the housing to rotate about said ?rst axis.
8. A device for cleaning the walls of a tank, as de
scribed in claim 5, wherein said gear drive includes a gear
encircling said drum member coaxial therewith and rigidly
connected thereto.
9. A device for cleaning the walls of a tank, comprising
a cleaning liquid conduit having an inlet and an outlet,
21 housing for said conduit, means supporting said hous
ing for rotation about a ?rst axis, a reaction nozzle sup
ported on said housing for rotation with said housing
about said axis and for rotation about a second axis sub
stantially at right angles to said ?rst axis, said nozzle
being conneced to the outlet side of said conduit to re
member immersed in said braking liquid, and drive means
operable by the drive action of the nozzle about said 65 ceive the cleaning liquid therefrom and to project the
cleaning liquid from said nozzle as a high velocity jet
second axis for rotating one of said members relative to
while said nozzle is rotated by the reaction of the liquid
the other to cause relative rotary movement of the body
passing therethrough, a shaft connected to said nozzle
of braking liquid in said drum member and the brake
‘along said second axis for rotation with said nozzle about
member immersed therein, said brake member presenting
brake surfaces in the braking liquid offering resistances 70 said second axis and supported on said housing to cause
to the relative rotation of the brake member and the body
said shaft to revolve with said housing about said ?rst
of braking liquid, said resistance being transmitted through
said‘ drive means to said nozzle to retard rotation of said
axis, a worm connected to said shaft for rotation there
with, a worm wheel coaxial with said ?rst axis and mesh
nozzle about said second axis.
2. A device for cleaning the walls of a tank as described
ing with said worm, means ?xing said worm wheel against
rotation about said ?rst axis, whereby as said worm rotates
3,052,574
17
it travels along said worm wheel causing the housing to
rotate about said ?rst axis, a drum coaxial with said shaft
and connected thereto for rotation therewith about said
second ‘axis, said worm encircling said drum and being
rigidly connected thereto whereby said drum rotates with
said shaft about said second axis, said drum containing
a braking liquid, a brake member immersed in the brak
18
shoulder axially facing the nozzle, said housing having a
bearing for said shaft and an ‘annular shoulder facing axi
ally away from said nozzle, the shoulder on said drum
abutting the shoulder on said housing, said conduit along
said shaft presenting axially facing surfaces acted upon
by the pressure of the cleaning liquid as said cleaning
liquid passes through said conduit rtowards said nozzle,
said surfaces being relatively proportioned in areas to
produce a resultant from the pressure of the cleaning
tion of said shaft, the drum in conjunction With the brak 10 liquid acting along said second axis in a direction to press
ing liquid and the brake member rotate relatively, retard
the shoulder on said drum towards the nozzle and against
ing thereby the rotation of said shaft.
the shoulder on the housing to effect a sealing running ?t
10. A device for cleaning the walls of a tank, compris
between said shoulders.
ing a cleaning liquid conduit having an inlet and an out
13. A device for cleaning the walls of a tank, compris
let, a housing for said conduit de?ning a bearing in com 15 ing a cleaning liquid conduit having an inlet and an outlet,
munication with part of said conduit and de?ning an
a housing for said ‘conduit, means supporting said housing
annular axially facing shoulder, means supporting said
for rotation about a ?rst axis, -a reaction nozzle supported
housing for rotation about a ?rst axis, a reaction nozzle
‘on said housing for rotation with said housing about said
supported on said housing for rotation with said housing
axis and for rotation about a second axis substantially at
about said axis and for rotation about a second axis sub 20 right angles to said ?rst axis, said nozzle being connected
stantially at right angles to said ?rst axis, said nozzle
to the outlet side 'of said conduit to receive the cleaning
being connected to the outlet side of said conduit to re
liquid therefrom and to project the cleaning liquid from
ceive the cleaning liquid therefrom and to project the
said nozzle as a high velocity jet while said nozzle is
cleaning liquid from said nozzle as a high velocity jet,
rotated by the reaction of the liquid passing therethrough,
means for rotating said nozzle about said second axis 25 a shaft connected to said nozzle along said second axis
by the energy of the cleaning liquid passing through the
for rotation with said nozzle about said second axis and
cleaning device, means automatically operable as said
supported on said housing to cause said shaft to revolve
nozzle rotates about said second axis for simultaneously
with said housing about said ?rst axis, a worm connected
rotating said housing about said ?rst taxis and including
to said shaft for rotation therewith, a worm wheel coaxial
a shaft rigid with said nozzle and extending along said 30 with said ?rst axis and meshing with said worm, means
second axis, and liquid braking means for retarding the
?xing said worm wheel against rotation about said ?rst
speeds of rotation of said housing and said nozzle about
axis, whereby as said worm rotates it travels along said
said axes respectively, and comprising a drum connected
worm wheel causing the house to rotate about said ?rst
to said shaft for rotation therewith and supported in said
axis, a drum connected to said shaft beyond said worm
bearing, said drum having a cap at one end with an 35 on the side of said worm opposite said nozzle and con
ing liquid in said drum, and means rigidly connecting
said brake member to said housing, whereby upon rota
annular axially facing shoulder confronting the shoulder
on said bearing, said drum containing a brake liquid, and
a brake member immersed in said braking liquid and
connected to said housing against rotation relative to
said housing, said brake member having a contour resist
ing relative rotation of the braking liquid and the brake
member, said brake member also having a contour tend
ing to feed the braking liquid towards the other end of
the drum and to apply pressure to the wall at the latter
taining a braking liquid, a brake member immersed in the
‘brake liquid in said drum, and means rigidly connecting
said brake member to said housing, whereby upon rota
tion of said shaft, the drum in conjunction with the brak
ing liquid and the brake member rotate relatively retard
ing thereby the rotation of said shaft.
14. A device for cleaning the walls of a tank, compris
ing a cleaning liquid conduit including a liquid distributing
sleeve perforated to permit the liquid to flow out there
end to bring the shoulders in sealing running relation 45 from and having an inlet, a tube secured to the inlet end
ship.
of said sleeve against rotation relative thereto, and having
11. A device for cleaning the walls of a tank as de
scribed in claim 10, wherein the brake member is in the
form of a worm.
12. A device for cleaning the walls of a tank, compris
ing a cleaning liquid conduit having an inlet and an outlet,
a housing for said conduit, means supporting said housing
for rotation about a ?rst axis, a reaction nozzle supported
on said housing for rotation with said housing about said
vaxis and for rotation about a second axis substantially at
right angles to said ?rst axis, said nozzle being connected
to the outlet side of said conduit to receive the cleaning
liquid therefrom and to project the cleaning liquid from
a head with an annular bevelled seat, a hollow mounting
nut embracing the head of said tube and having a bevelled
seat engaging the seat on said tube, said seats permitting
the tube and sleeve on the one hand and the nut on the
other to rotate relatively in the absence of any flow of
cleaning liquid through said not and said tube towards the’
inlet of said sleeve, but frictionally locking said nut and
said tube and in turn said sleeve against rotation by the
55 action of the pressure of the cleaning liquid on said tube
and said nut when passing said tube and said sleeve, a
turret supported on said sleeve for rotation thereabout
about a ?rst axis along said sleeve, a nozzle on the outside
said nozzle as a high velocity jet while said nozzle is ro
of the sleeve adapted to receive cleaning liquid discharged
tated by the reaction of the liquid passing therethrough, 60 from said sleeve and adapted to be rotated by the energy
means automatically operable as said nozzle rotates about
of said cleaning liquid ‘about a second axis substantially
said second axis for simultaneously rotating said housing
at
right angles [to said ?rst axis, and a drive connection
about said ?rst axis and including a shaft connected to
between said turret and said nozzle causing said turret
said nozzle along said second axis for rotation with said
to rotate about said ?rst axis as said nozzle rotates about
nozzle about said second axis and supported on said hous
65 said second axis.
ing to cause said shaft to revolve with said housing about
15. A cleaning device as described in claim 14, where
said ?rst axis, and liquid braking means for retarding the
in said drive connection comprises a Worm wheel embrac
speeds of rotation of said housing and said nozzle about
ing said sleeve and rigidly connected thereto, a shaft con
said axes respectively, and comprising a drum connected
nected to said nozzle and extending along said second
to said shaft for rotation therewith and containing a brak 70 axis, and a worm rigidly connected to said shaft for rota
ing liquid, and a brake member immersed in said braking
tion therewith about said second axis and meshing with
liquid and connected to said housing against rotation rela
tive to said housing, said brake member having a contour
said worm wheel.
,
16. A device for cleaning the walls of a tank, compris
resisting relative rotation of the braking liquid and the
ing a cleaning liquid conduit having an inlet and an outlet,
brake member, said drum having an external annular 75 a turret supporting said conduit, means supporting said
3,052,574
20
turret for rotation about a ?rst axis, a nozzle supported
on said turret for rotation with said turret about said axis
and for rotation about a second axis substantially at right
angles to said ?rst axis, said nozzle being connected to the
outlet side of said conduit to receive the cleaning liquid
therefrom and to project the cleaning liquid from said
nozzle as ‘a high velocity jet, means for rotating said nozzle
cluding a nozzle carrier in the form of a T-tube having
radially opposed cross arms, said nozzles having respec
tive inlet legs supported on said cross arms respectively
for adjusting action about the radial axes respectively of
said cross arms, said nozzles having respective discharge
legs similarly turned in relation to the respective inlet legs
to impart substantially equal reactions to said nozzles for
about said second axis by the energy of the cleaning liquid
rotation in the same directions about said ?rst axis, an
passing through the nozzle, and drive means for rotating
adjusting bevel gear mounted on said carrier for rotation
said housing about said ?rst axis as said nozzle rotates 10 about said ?rst axis relative to said nozzle carrier, bevel
about said second axis and comprising a worm wheel and
gears connected to said inlet legs respectively for rotation
a worm meshing therewith, said worm having n number
therewith about said radial axes respectively, releasable
means for locking said adjusting bevel gear in adjusted
of ‘threads, where n is more than one, and
rotative position, and means automatically operable as
m
said nozzles rotate about said ?rst axis for simultaneously
11
rotating said nozzles bodily about an axis substantially at
is equal to a mixed number, 'where m is the number of
right angles to said ?rst axis.
teeth in the worm wheel, whereby the jet impingement
21. A device for cleaning the walls of a tank, compris
stripes generated by the jet projected by the nozzle against
ing a cleaning liquid distributing sleeve having a periph
the walls of the tank during one turn of the turret about 20 eral wall with one or more discharge openings there
said ?rst axis, is phasically offset from the jet impinge
around and open at opposite ends to de?ne an inlet and
ment stripes generated ‘by the jet projected by the nozzle
an outlet at said ends respectively, the open outlet end of
against the walls of the tank during the next previous turn
the sleeve being adapted to have ‘attached thereto a sec
of the turret about said ?rst axis.
ond cleaning device in series with the ?rst cleaning device,
17. A device for cleaning the walls of a tank compris 25 a housing around said sleeve having two hubs for said
ing a pair of nozzles, means for conducting cleaning liquid
sleeve ends respectively and de?ning a passageway for
to'said nozzles, means mounting said nozzles for rotation
in unison about an axis, said nozzles having respective
the cleaning liquid discharged from said sleeve through
inlet legs substantially radially aligned in opposite direc
end of said sleeve for connection to a cleaning liquid
said opening or openings, means for mounting the inlet
tions in a plane substantially at right angles ‘to said axis, 30 supply with said sleeve ?xed against rotation, while said
and having respective discharge legs turned substantially
housing is rotatable about said sleeve about a ?rst axis, a
180° in relation to the corresponding inlet legs to receive
reactions from the cleaning liquid passing through the
reaction nozzle supported on said housing for rotation
therewith about said ?rst axis and supported for rotation
nozzles by which said nozzles are rotated in unison about
about a second axis substantially at right angles to said ?rst
said axis, means mounting said nozzles for adjustment 35 axis as the cleaning liquid passes through said nozzle, said
about the axis of radial ‘alignment of the inlet legs of the
nozzle communicating with said passageway, means for
nozzles in said plane, and means automatically operable
simultaneously rotating the nozzle with the housing ‘bodily
as said nozzles rotate about said axis for simultaneously
about said ?rst axis, and a rotary liquid braking means
rotating said nozzles bodily about another axis substan—
containing a constant amount of braking liquid aside
tially at right angles to said ?rst mentioned axis.
from the cleaning liquid and supported ‘on said housing
18. A device for cleaning the Walls of a tank compris
ing a pair of similar reaction nozzles having respective
inlet legs extending along respective leg axes in different
directions laterally from a ?rst axis of rotation, and hav
ing respective discharge leg-s similarly turned in relation
outside of said sleeve for retarding the speeds of rotation
of said housing and said nozzle about said axes respec
tively.
22. A device for cleaning the Walls of a tank, as de
scribed in claim 21, comprising a removable plug, said
to the respective inlet legs in directions to receive substan
tially equal reactive forces from the cleaning liquid as it
is, discharged from said nozzles tending to rotate said
sleeve having means near its outlet end for removably
means mounting said nozzles for rotation in unison about
from each other, one of said chambers having an inlet
and an outlet, means mounting said housing for rotation
about a ?rst axis, a reaction nozzle on the outlet of said
one chamber supported on said ‘housing for rotation
receiving said plug to close said sleeve outlet to permit the
cleaning device to be employed singly.
nozzles in the same direction about said ?rst axis of rota
23. A device for cleaning the walls of a tank, compris
tion, means for conducting cleaning liquid to said nozzles, 50 ing a housing de?ning two chambers sealably isolated
said ?rst axis, a single manual adjusting member, means
responsive to the manual adjusting movement of said
adjusting member for adjusting said nozzles rotatively
and simultaneously about respective leg axes to the same
extent and in directions to vary the reactive forces re
ceived from the cleaning liquid substantially to the same
extent as said liquid is discharged from said nozzles, and
means automatically operable as said nozzles rotate about
with said housing about said ?rst axis and for rotation
about a second axis substantially at right angles to said
?rst axis, a shaft secured to said nozzle and extending
along said second axis for rotation with said nozzle about
said second axis and extending into said one chamber and
said ?rst axis for simultaneously rotating said nozzles 60 through a separating wall between chambers with a seal
bodily about another axis substantially at right angles to
ing ?t into the other chamber, a liquid braking means
said ?rst axis.
in said other chamber including a rotatable member se
19. A device for cleaning the walls of a tank as de
cured to said shaft for rotation therewith in contact with
scribed in claim 18, wherein said adjusting member com
prises an adjusting bevel gear on the face of said nozzles
having its axis of rotation substantially coextensive with
said ?rst axis, and wherein the means for adjusting said
nozzles simultaneously comprises bevel gears secured to
about said second axis, and a gear train in said other
chamber having ‘one of its gears secured to said shaft for
rotating said housing about said ?rst axis as said nozzles
rotate about said second axis.
said inlet legs respectively for rotation therewith respec
tively about their leg axes and meshing with said adjust
24. A device for cleaning the walls of a tank, compris
ing a housing including a bottom wall, peripheral walls, a
ing bevel gear.
20. A device for cleaning the walls of a tank compris
ing a pair of similar reactive nozzles, means for conduct
braking liquid for retarding the rotation of said nozzle
transverse wall between said peripheral walls and a sepa
rate cover having a cover plate sealed on said walls, said
Walls and said cover de?ning two chambers sealed from
ing cleaning liquid to said nozzles, means mounting said
each other ‘and separated by said cover plate, one of said
nozzles for rotation in unison about a ?rst axis and in 75 chambers having an inlet and an outlet, a peripherally
3,052,574.
21
perforated liquid distributing sleeve extending through
22
axis and extending along the length of said tank while
said inlet into said sleeve, means supporting said housing
maintaining the relative rates of movements of the nozzle
for rotation about said sleeve along a ?rst axis, a reaction
nozzle on the outlet of said one chamber supported on
nozzle to generate a helical jet with successive convolu
about said axes substantially constant to cause said
said housing for rotation with said housing about said
?rst axis and for rotation about a second axis substantially
at right angles to said ?rst axis, a shaft secured to said
nozzle for rotation with said nozzle about said second
axis and extending into said one chamber through said
tions extending in angularly displaced radial planes when
transverse wall with a sealing ?t and into the other cham
?rst axis along said sleeve, the sleeve of one of said de
vices having an inlet and an outlet at opposite ends, the
ber, said sleeve having rigid therewith an axle extending
along said ?rst axis through said cover plate and into
said other chamber, a worm secured to said shaft in said
other chamber, a worm wheel meshing with said worm
the tank is observed in end elevation.
28. In combination, a pair of tank cleaning devices,
each comprising a straight sleeve and a housing supported
on said sleeve for rotation about said sleeve and about a
sleeve of the other device having an inlet at one end and
being closed at the other end, a reaction nozzle on each
housing supported thereon for rotation therewith about
and secured to said axle in said other chamber, whereby 15 said ?rst axis and for rotation about a second axis sub
stantially at right angles to said ?rst axis, each of said
as said shaft rotates about said second axis, the worm
housings de?ning a passageway extending from the corre
moving around the ?xed worm wheel moves the housing
sponding sleeve to said nozzle and communicating with
about said ?rst axis, and liquid braking means for the
the interior of said sleeve, whereby cleaning liquid can
nozzle enclosed in said other chamber comprising a mem
ber secured to said shaft in said other chamber for rota 20 flow through each of said devices from the inlet of its
vsleeve through its passageway and through its nozzle to
tion therewith and a braking ?uid in contact with said
project a high velocity cleaning jet from the nozzle, means
member.
for rotating said housing about said ?rst axis simultane
25. A device for ‘cleaning the Walls of a tank compris
ously and automatically as said nozzle rotates about said
ing a turret, means supporting said turret for movement
about a ?rst axis, said cleaning device being adapted to 25 second axis, a connection between the outlet of the sleeve
of said one device and the inlet of the sleeve of said other
be supported with said ?rst axis horizontal or vertical, a
conduit supported on said turret and having an inlet and
an outlet for the cleaning liquid, a nozzle unit supported
device, whereby the cleaning liquid passes through said
devices connected in series, and a rotary liquid braking
on said turret at the outlet of said conduit for movement
means in each housing containing a constant amount of
a counterweight on said turret at a region on the side of
extending substantially vertical, and said connection being
braking liquid aside from the cleaning liquid and located
with said housing about said ?rst axis and adapted to be
in said housing outside of and on one side of the corre
rotated by the energy of the cleaning liquid passing
sponding sleeve for retarding the speeds of rotation of
through said nozzle unit about a second axis substantially
said housing and the corresponding nozzle about the axes
at right angles to said ?rst axis and spaced therefrom, the
respectively
of said housing and the corresponding nozzle.
center of gravity of said nozzle unit being substantially
29. The combination as described in claim 28, where
on said second axis, whereby when said device is sup
in said connection is straight and the sleeves of the two
ported with said ?rst axis horizontal, said center of
devices
and said connection are joined in series in axial
gravity moves substantially in a vertical plane about said
alignment along said ?rst axis.
?rst axis, drive means for moving said nozzle unit about
30. The combination as described in claim 29, where
said ?rst axis With said turret automatically as said nozzle 40 in the two devices extend with said one device directly
unit rotates about said second axis, means for supporting
above the other, with their sleeves and said connection
said ?rst axis substantially diametrically opposite said
substantially long to permit the two devices to operate
simultaneously at di?erent remote levels in a tank being
moves about said ?rst axis when said device is supported 45 cleaned.
with said ?rst axis extending horizontally, and a counter
31. A device for cleaning the walls of a tank as de
center of gravity to counterbalance said nozzle unit as it
weight removably supported by said counterweight sup
porting means, whereby said counterweight may be absent
when said device is operated with said ?rst axis vertical.
26. .A device for cleaning the Walls of a tank elongated
in a horizontal direction and having a length substantially
greater than its transverse dimensions, comprising a tur
ret, means supporting said turret for movement about a
?rst horizontal axis extending along the length of said
tank, a conduit supported on said turret and having an
inlet and an outlet for the cleaning liquid, a nozzle sup
ported on said turret at the outlet of said conduit for
movement with said turret about said horizontal axis,
means for rotating said nozzle about a second axis sub
scribed in claim 1, wherein said brake surfaces extend
laterally of the axis of said brake member about which
said brake member and said body of braking liquid are
relatively rotatable.
32. A device for cleaning the walls of a tank, com
prising a cleaning liquid conduit having an inlet and an
outlet, a turret supporting said conduit, means support~
ing said turret for rotation about a ?rst axis, a nozzle
supported on said turret for rotation with said turret about
said axis and for rotation about a second axis substan
tially at right angles to said ?rst axis, said nozzle being
connected to the outlet side of said conduit to receive
stantially at right angles to said ?rst axis by the energy of 60 the cleaning liquid therefrom and to project the cleaning
liquid from said nozzle as a high velocity jet, said nozzle
the cleaning liquid passing through said device, and a
having a discharge leg turned in relation to the rest
drive connection between said nozzle and said turret caus
of the nozzle to receive the reaction of the cleaning liquid
ing said turret and said nozzle to rotate about said ?rst
axis and said second axis respectively at predetermined 65 as it is discharged from said leg as a high velocity jet,
a liquid braking means applying constant braking force
relative speeds.
for retarding the speeds of rotation of said turret and
27. A method of cleaning walls of a tank elongated in
said nozzle about said axes respectively, and means
a horizontal direction and having a length substantially
mounting said discharge leg for adjustment in relation to
greater than its transverse dimensions, which comprises
supporting a nozzle in the tank, projecting liquid from 70 said second axis to adjust the speed of rotation of said
nozzle about said second axis.
said nozzle as a high velocity jet so that the jet impinges
33. A device for cleaning the ‘walls of a tank as de
on the walls of the tank, causing said nozzle to rotate
scribed in claim 1, wherein said drum member is located
about a ?rst axis as the jet is discharged therefrom, and
in said conduit to be cooled by the cleaning liquid in its
simultaneously causing said nozzle to move bodily about
a horizontal axis substantially at right angles to said ?rst 75 passage through said conduit.
3,062,574
24
23
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,642,910
1,733,249
1,806,100
1,806,740
1,831,029
1,876,607
Thompson __________ __ Sept. 20, 1927
Clinton _____________ __ Oct. 29, 1929
Thompson ___________ __ May 19, 1931
Butterworth _________ __ May 26, 1931
Paris _______________ __ Nov. 10, 1931
Butterworth _________ __ Sept. 13, 1932
2,030,194
2,045,752
2,661,241
2,731,296
2,805,889
Grif?th _______ __,_,_______ Jan. 17, 1956
Terry ____, ______ __,,_,__ Sept. 10, 19,57
500,395
France ____________ __,_ Dec. 16, 1919
Bell _____, ______ __,_____ Feb. 11, 1936
Butterworth _ _____ __,___,_ June 30, 1936
Veneziano ____ _, _____ __ Dec.
1,
1953
FOREIGN PATENTS
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