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Патент USA US3074659

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Jan. 22, 1963
V
n. E. ATKINSON
3,074,649
SPRAYING APPARATUS
Filed Marc-h 25, 1961
5 sheets-sheet 1
INVENTOA
DUANE E. ATK/NSON
A T TO/PNE VS
Jan. 22, 1963
D. E. ATKlNsoN
3,074,649
SPRAYING APPARATUS
Filed March 23, 1961
5 Sheets-Sheet 2
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INVENTOR.
DUANE E. ÄTK/NSON
A TTO/PNEVS
Jan. 22, 1963
D. E. ATKINSON
3,074,649
SPRAYING APPARATUS
5 Sheets-Sheet 3
Filed March 25, 1961
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Jan. 22, 1963
D. E. ATKINSON
3,074,649
SPRAYING APPARATUS
Filed March 23. 1961
5 Sheets-Sheet 4
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INVENTOR.
DUA/VE E. ATK/NSON
Jan. 22, 1963
D. E. ATKINSON
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3,074,649
SPRAYING APPARATUS
Filed March 25, 1961
5 Sheets-Sheet 5
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DUANE E. ATK/NSO/.V
A T TORNEVS
United States Patent O1 "ice
2
1
relatively small scale of the apparatus of this invention;
FIG. 2v is an enlarged front elevational view of the
amas@
SPRAYING APPARATUS
Duane E. Atkinson, 102 Fey Drive, Burlingame, Calif.
Filed Mar. 23, 1961, Ser. No. 97,943
8 Claims. (Ill. 239---165)
This invention relates to spraying apparatus and the
like and more particularly to a device adapted to be
mounted at the outer end of a swinging boom and aimed
from a remote control station.
The apparatus of this invention may have many uses
including that of washing the insulators on which power
transmission lines are suspended from utility poles or
towers. Under many conditions such insulators collect
dust, water vapor, and the like which, over a period of
time, decreases their insulating capacity and may cause
3,074,649
Patented Jan. 2_2, 1,963
spraying apparatus support structure of FIG. 1;
Ul
FIG. >3y is a greatly enlarged sectional view as seen gen
erally from line 3_3 of FIG. 2;
FIG. 4 is a sectional view as seen from line 4-4 of
FIG. 3;
FIG. 5 is a cross-sectional view taken along line 5--5
of FIG. 2;
FIG. 6 is a semischematic view of the control means
for remotely aiming the spraying apparatus of FIG. 1;
FIG. 7 is a top plan View of the mounting structure for
the control lever of the control means of FIG. 6; and,
FIG. 8 is a side elevational view of the mounting struc
ture of FIG. 7.
In general, referring to FIG. 1, the apparatus of this
invention comprises a spraying nozzle or other device 1
short circuiting or grounding of the power transmission
mounted on a platform 2 supported at the outer end of a
line. It is therefore common practice, especially in regions
boom 3 carried by a ground supported vehicle 4. Vehicle
where natural rainfall is infrequent, to periodically wash
such insulators with a nonconducting fluid, such as rela 20 4 may be of the conventional type, providing a driver’s and
operator’s cab 5 and having a conventional boom support
tively pure water.
ing structure 6. Said structure 6 mounts boom 3 for
Heretofore such washing has been accomplished by
rotation about a generally vertical axis and for swinging
supporting an operator with a tire hose at the outer end of
to various positions extending upwardly of the vehicle
a vehicle mounted swingable and extendable boom. Such
prior apparatus has been unduly cumbersome in that it 25 about a generally horizontal axis. Boom carrying ve
hicles of this type are commonly used for servicing and
has required suiîicient strength in the boom to support
maintaining utility power installations and the like.
the operator as Well as his spray equipment at an elevated
To provide the boom 3 with a substantial range of
position above the vehicle. In addition, the use of such
_movement with respect to the vehicle, said boom is pref
apparatus also requires the employment of a vehicle op
erator for controlling the position of the swingable boom 30 erably of the extendable type in which a plurality of elon
gated boom sections 7 are mounted for sliding with re
and moving the vehicle between the utility poles along
spect to each other toward and away from the boom sup
the power transmission line.
Since the insulators to be washed may be suspended at
various heights above the ground and at different loca
tions with respect to the utility poles, the range of move
ment of the swingable boom carrying the operator and his
spraying equipment must be considerable. The problems
inherent in supporting the operator and his spraying
equipment for movement over such a range of elevated
porting structure 6. Suitable cable or hydraulic operat
ing means, such as hydraulic cylinder 8 (FIG. 1’) are
provided for rotating, elevating, and extending boom 3
and commonly include control means (not shown) ac
cessible to the operator for controlling these functions of
the boom. In this respect, boom 3 functions to change
the elevation and attitude of platform 2 throughout the
positions have been further complicated by the fact that 40 range of movement of the boom.
the apparatus for this use must be able to withstand being
transported over relatively rugged terrain.
r’_Ihe vehicle 4 may also carry one or more tanks 9 as
a source of water or other fluid to be sprayed from nozzle
1. A pump 10 serves to supply ñuid under pressure
through a conduit 11 extending to the outer end of boom
Although the apparatus of this invention is herein s_pe
citically described for use in Washing power transmission
line insulators, many other uses, such as agricultural 45 3. When used with an extendable boom, conduit 11 is
preferably a liexible hose supported on conventional reel
spraying, iire fighting, mounting of optical devices, fruit
or pulley take-up means (not shown) for taking up the
picking, and the like are contemplated.
slack in the hose during retraction of the boom.
v
It is an object of this invention to provide means for
The platform, generally designated 2 (FIG. 2), sup
automatically maintaining a predetermined attitude of a
platform carrying a device adapted to be aimed with 50 porting the device 1 which is adapted to be aimed or
directed, comprises a pair of decks, an azimuth deck 14
respect thereto.
It is another object of this invention to provide appa
and an elevation deck 15, connected for supporting nozzle
Another object of this invention is the provision of
spraying apparatus in which a nozzle, supported at the
outer end of a swingable boom, may be directed by van
member 17 to the central portion of which azimuth deck
14 is secured.
Azimuth «an-d elevation decks 14, 15 are substantially
similar in construction and each comprises a housing `2,0
1 for rotation about a pair of mutually perpendicular
ratus in which a device supported at the outer end of a
axes. A yoke 16, secured to the outer end of _boom 3,
movable boom may be aimed from a remote control sta
tion with reference to a predetermined, normal attitude. 55 supports platform 2 by means of a U-shaped Suspension
operator from a remote ground station.
It is still another object of this invention to provide, in 60 (FIGS. 2_4), the bottom wall of which carries external
‘ly thereof a right angle pipe `fitting 21 (FIGS. 2, 4), s_e
combination with a vehicle supported swinging boom,
cured thereto >by ñange bolts 22. Internally of housing
spraying apparatus at the outer end of the boom which
29,
,the outer lsleeve element 23 of a rotatable pipe con
may be conveniently remotely controlled from the vehicle.
nection, generally designated 24 (FIG. 4), has its flan-ge
A further object of this _invention is the provision of
secured to the bottom wall of housing 20 so as to com
means for supporting a spray nozzle for remotely con 65
municate through an opening 26 in said bottom wal-l
trolled movement in elevation and azimuth with respect
to an automatically maintained reference attitude.
with pipe ~fitting 21. The inner _end portion of an V.inner
sleeve element 27 of rotatable connection 24 is received
Other objects and advantages will become apparent
in outer element 23 with the outer end extending out
from the following description taken in connection with
wardly
thereof into housing 20. Element 27 is provided
70
the accompanying drawings, in which:
with peripheral races carrying ball bearings 28 support
FIG. l is a perspective and partly schematic view on a
ing it ‘for rotation within outer element 23. A threaded
aora-,eas
cap 29 `closing a radial opening in outer sleeve element
23 provides access to the races for ball bearings 28.
A packing ring 30 of flexible «sealing material, such as
nylon or Teflon, is clamped between the ñange of sleeve
element 23 and the bottom wall of housing 20 with a lip
portion thereof projecting radially inwardly `across the
inner end of inner sleeve 27. It will be noted in FIG. 4
that a portion of opening 26 is larger than the internal
bore o-f inner sleeve Z7 to accommodate `a pressure ring
31 yand its backing springs 32 which serve to press the lip
portion of packing ring 30 against the surface of the
inner end of element 27 for ,sealing rotatable connection
24. An 0-ring dust seal 33 may also be provided adja
cent the outer end of sleeve 23.
The outer end of inner sleeve element 27 is jou-rnalled
in a bearing 34 carried by the top cover 35 of housing
2t), 'and .is connected to a tubular element 36, having a
iiange 37 at the outer end thereof, for rotation therewith.
Such connection may be by means of an externally
of a control lever in one direction controls the movement
of one deck and manipulation of the lever in another
direction, or of a separate lever, controls the other deck.
Each system is characterized by a signaling device which,
when operated iby its control lever, generates a command
signal fed into la comparing means 54 (FIG. 6). Com
paring means 54 performs the function of comparing Athe
command signal with a position signal fed thereto from
a position sensing device 55.
As is common practice in control systems of this type,
the position sensing device disclosed herein may be a po
tentiometer whose wiper arm or pickoíî is connected by
meshed gears 51, 56 (FIG. 3) to the shaft carrying worm
47. The angular position of nozzle 1 «about either the
azimuth or elevation axes is directly related to the angu
lar position of the corresponding worm shaft which is
transmitted through gears 51, 56 to potentiometer 55 so
that said potentiometer generates a `follow-up or position
signal indicative of said position.
From la comparison of the command signal and the
position or follow-up signal, comparing means 54 gen
threaded hollow element 38 received within and engaged
with internal threads >formed in elements 27, 36.
By the structure thus far described, means is provided
supporting elements 36 for rotation with respect to their
plifier 57 4and thereafter fed into motor 46 for actuating
associa-ted decks 14 and 15.
the same.
Element 36 of deck 14 is
erates an error signal which may `be amplified by an am
So long as there is a difference between the
secured to a right angle pipe fitting 41 (FIG. 2) which 25 actual position of nozzle l about its `axes of rotation and
the position directed by the command signa-ls from con
communicates with and is connected to right angle lit
trolling unit 52, motors sin will drive said nozzle to elimi
ting 21 of elevation deck 15 by a pair of pipe nipples 42,
nate such difference.
43 and an intervening pipe elbow 44. By this means
elevation deck 15 is supported in a position normal to
In a control system of this »type where the movement
azimuth deck 1d and for rotation about a first axis coin 30 of 4the nozzle is proportional to the movement of the
ciding with the axis of rotatable connection 24 and the
control lever 53, it is preferable to mount the control
lever so that it may be manipulated forwardly and rear
element 36 of said lazimuth deck.
wardly to control, yfor example, elevation fand from side
A right angle pipe connection 45 (similar to connec
to side to control the azimuth position of the nozzle. An
tion 41) is secured to the element 36 of elevation deck
15 and carries nozzle 1 projecting therefrom in a direc 35 operator, even if previously unskilled, may most readily
acquaint yhimself with the proper lever manipulation to
tion normal to a second axis coinciding with the axis of
yield the desired nozzle control when Ithe control lever is
rotation of connection 24 and element 36 of said eleva
tion deck. In this manner nozzle 1 is supported for
mounted in this manner. Especially in the specific illus
swinging about said second axis which is perpendicular
tration herein described where the nozzle is supported
40 at the end of the boom generally forwardly of the vehicle
to the first »axis of azimuth `deck 14.
Platform 2, comprising azimuth deck 14 and eleva
tion deck 15, therefore supports nozzle 1 for rotation
(FIG. l), it is preferable that manipulation of the con
trol lever forwardly and rearwardly of the vehicle con
about said iii-st and second axes so that said nozzle may
trols the nozzle elevation and movement of the lever
be aimed in both azimuth and elevation orientation.
from side -to side controls the azimuth position of the
nozzle.
Driving means -for so aiming nozzle 1 are provided in
A mounting structure for control lever 53 that satisfies
each of decks 14, 15 by a motor 46 (FIG. 3) which has
its shaft connected to a worm 47. Said worm is meshed
the above purposes is illustrated in FIGS. 7 and 8. Con
with a gear 48 (FIGS. 3, 4) carried by a ring 49 ñxed
trol unit 52 includes a pair of signaling devices 5S,
on inner sleeve element 27, as by `a set screw 50. The
59 which generate the command signals fed into com
motor 46 carried by azimuth deck 14 thereby serves to 50 paring means 54. Devices 58, 59 may be potentiometers
rotate fitting 41 and elevation deck 15 carried thereby
similar to position sensing devices 55, and connected
about the first or lazimuth axis, and the motor of eleva
tion deck 15 serves -to rota-te fitting 45 `and nozzle 1 about
the =second or elevation axis.
In some instances it is desirable to limit the rotation 55
of the nozzle »about these axes and each deck may there
in a manner such that the motor 46 on elevation deck
l5 is responsive to one of said signaling devices 58 and
the motor on azimuth deck 14 is responsive to the signal
from the other deviceV 59.
Control lever 53 projects upwardly from the control
unit 52 (FIGS. 1, 6, 8) and is secured at its lower end
to a shaft 66* (FIGS. 7, 8) journalled in the side plates
with one or more notches 4o (FIG. 4) for receiving the
61, 62 of a mounting bracket, generally designated 63.
actuating yarm roller of switches 39 for yopening the 60 Lever 53 is therefore supported for swinging in a plane
switches and thereby interrupting the circuit to motor 46
generally parallel to side plates 61, 62 of bracket 63
at the extremities of the range of rotation selected for
which also carries potentiometer 58 with its operating
nozzle 1 -about either -the azimuth or elevation axis.
shaft 64 journalled in said plates. A gear segment 65
Control of such rotation of nozzle 1 'about these
secured on shaft 6l) is in mesh with a gear 66 secured
mutually perpendicular axes for directing or aiming the
on shaft 64 thereby connecting potentiometer 58 for
operating by swinging lever 53 in the plane of bracket
nozzle stream is provided by control means (schemati
63.
cally illustrated in FIG. 6) which may be in the form
of a conventional closed loop positional servo system.
Mounting bracket 63, including lever 53 and opera
fore carry limit switches 39 (FIGS. 3, 4) connected in
the electrical circuit to motor 46. Ring 49 is provided
Such unit includes a control or command unit 52, con
tively connected potentioeter 58, is supported by a pair
veniently located at :a control station in the cab 5 (FIG. 70 of stub shafts 67 projecting outwardly from opposed end
1), and having a manual control lever 53, manipulation
of which causes motors 46 to drive nozzle 1 through its
azimuth and elevation arcs.
conventionally, similar closed loop control systems
are provided for each of the decks so that m-anipulation 7
plates 63 and journalled in bearings 69 for swinging in
a second plane perpendicular to the ñrst plane in which
lever 53 swings. The base 70 on which bearings 69
are supported also carries» a support 71 (FIG. 8) mount
ing potentiometer 59 with its wiper
operating shaft
3,074,649
5
21', and- thence through connectors 24 (FIG. 4‘) of plat
forms 14, 15 (FIG. 2),_ and pipe fitting 45 to nozzle 1.
A conventional valve 92 (FIG. 1)_ is preferably provided
to the axis of shaft-_64 of potentiometer 58. A gear 73
on shaft 72 meshed with a gear segment 74 secured to
shaft Y67 serves to operatively connect mounting bracket
63 and _therefore lever _53 with potentiometer 59.
6
111, rotatable' connector 83, suspension member 17, fitting
72 journalled forrotation about an axis- at right' angles
in conduit 1'1' for'cont'rolling' the flow of fluid from tanks
5
9 to nozzle 1.
Such valve may be of the solenoid actuated- type and
_ In this manner, swinging lever 53 in the vfirst plane of
¿mounting bracket 63, _denoted by _dot-dash line 75 in
is peferably opened and closed by a control button 93
(FIGS. 6, 8) provided on the control knob 94 of lever
plane, denoted by dot-dash line 76, operates signaling 10 53. The control cable 95 (FIG. l) which includesv the
wires serving to connect the signaling devices of control
device 59. Each of> said signaling devices as previously
unit 52 to the’ _appropriate comparing and amplifying
described, is connected _to one of the comparing means-_
FIG.v 7, _operates signaling `device 58, 4and swinging said
lever and mounting bracket 63 in the second, normal
means 54, 57 (FIG. 6) may also' serve to connect con
trol button 93 to tbesolenoid actuator for valve 92, as
a'mpliñer units 54-57 of FIG. 6 so as to direct the change
of position of nozzle 1 in azimuth through deck 14 and
elevation through deck 15.
_
15
elevation `deck 15 and signaling device 59 to azimuth
deck 14, control unit 5'2 is preferably oriented with plane
7_5 extending longitudinally of vehicle 4 (FIG. l) and
plane 76 extending transversely thereof. With this re
lationship established it is _an easy matter for a relatively
by a branch cable96 (FIG. l).
The issuance of lluid under pressure from nozzle 1
creates a substantial reaction forcek tending to swing plat
form 2‘ about its suspension axis of bearing 82 and con
Assuming signaling device 58_is connected to control
nector 83 (FIG. 2). _In order to prevent such swinging
20 and to maintain platform 2 stable in its predetermined
attitude during the spraying of fluid by nozzle 1, pres
sure responsive braking means is incorporated in con
unskilled vc_aperatorto position _the nozzle as desired by
nector 83 __(FIG. 5). At its inner ñanged end, adjacent
housing 85, pipe connection ‘90 is provided with an en
vationaxismaintained generally horizontal. In essence, 25 larged recess 96 of larger diameter than the inside of
sleeve 84. A ring seal 97 of tough, flexible packing mate
a predetermined attitude of platform 2 must be main
rial such as nylon or Teflon, secured between flanges 86
tained with respect to the operator’s normal reference
and 81 has an inwardly projecting lip portion 98 extend
ofhorizontal and vertical during swinging of the boom
ing into recess 9_6 and _across vthe inner end surface of
3 through various vertical angles which would otherwise
30 sleeve 84. Said lip portion is held against the inner end
change such attitudes. _
_
natural manipulation of control lever 53, so long as the
azimuth axis is maintained generally vertical or the ele
of sleeve 84 by a backing ring 99 and a plurality of coil
In _the specific apparatus herein described such refer
ence is maintained by supporting platform 2 upon swing
able suspension member _17 (FIG. 2). Member 17 may
springs 1Gb, abutting the bottom of recess 96, with suf
ficient pressure to render the joint fluid tight but permit
a free rotation of connection 90 and housing 8‘5 with
be a generally U-shaped tubular member having platform
2 secured to _its central portion 79 and with the outer
ends ofits upwardly extending legs S0, 81 rotatably con
35
respect to sleeve34: __ _
_
When valve 92 (FIG. l) is shut off and no substantial
fluid pressure exists in the conduit means from tank 9 t0
nected to the outer ends of yoke 16._ One of said legs
_80 may be so connected by a conventional self-aligning
supply nozzle 1, including the passage through rotatable
connector 83, suspension member 17 carrying platform 2
bearing 82 whereas the other of said legs 81 is so con
nected by a rotatable connector 83 which includes a 4.0 is f'ree to swing and to be maintained by gravity at its
normal attitude with reference to the horizontal. Under
brake means, to be described.
su'chconditions, of course, there is no jet reaction from
_ Suspension member 17 and platform 2, including noz~
nozzle 1. After the nozzle has been aimed at the target
zle 1, are supported with the center of gravity thereof
to be sprayed (such as the insulator in FIG. l) as here
~below the aligned, generally horizontal axes of bearing
82 and connector 83. By such mounting no matter Y inbefore described, and valve ‘92 opened by depressing
button 93 (FIG. 8), ñuid under pressure will be trans
_what the vertical _angle of boom 3 and yoke 16, platform
mitted to said nozzle through the ñuid passages described.
14 and the elevation axis about which nozzle 1 rotates
Such pressure in the fluid passage through sleeve 84 and
will be maintained generally horizontal by gravity in
the manner of a pendulum. Such pendulum action of
platform 2 _about the horizontal axis of bearing 82 and
connector S3 will automatically maintain the platform
pipe connection 90 effects a braking action on rotatable
t
c.,
attitude related to the normal reference of the operator.
Connector 83 _(FIG. 5) is generally similar to con
nector 24 in that itincludes an inner sleeve member
84 lthe inner en_d of which Vis journalled for rotation in
a cylindrical outer sleeve or housing 35 having a peri
pheral _iiange 8'6. Ball bearings S7 may be provided in
yment with the inner end of sleeve 84 thereby preventing
o. or movement between said inner sleeve and said seal which
is secured to housing 85. It Vwill be noted that the braking
force thereby applied to prevent ‘rotation o'f connector 83
and swinging of suspension member 17' by the influence
grooved races _in members v84` and 85 _for free rotation
thereof._ A clamp S8 (FIGS. 2, 5) serves to secure
_sleeve 84 to the outer end of the arm of yoke 16 opposite
bearing 82 with 'the axis offrotation of members 84,
85 aligned with the axis of said bearing. A pipe elbow
threadedly >'received in the outer end -of sleeve 84 con»
nects said sleeve with conduit 11 for passage of the
fluidto said sleeve from pump 1G (FIG. l).
_ `À right angle pipe connection 90, having a flange 91
bolted to the ilange 86 of housing 85, is connected to
_the upper endof leg 8 (FIG. 2) thereby supporting sus
connector 83 preventing relative rotation between housing
85 and sleeve S4 (FIG. 5).
'_Ihe fluid pressure in recess 9‘6 forces backing ring 99
and lip portion 98 of seal 97_into tight frictional engage~
GI)
of the vjet reaction of nozzle 1 is proportional to the force
of such jet reaction, since both forces are 'proportional
to the ñuid pressure. The y‘greater the j'et reaction, there~
fore, Vthe greater the braking action of lip portion 9S 'of
seal 97 responsive to the lpressure 'to Vlock member 17
against swinging.
(i5
It will be apparent that pressure responsive diaphragms,
sleeves vand the like may be alternatively employed in
rotatable connection l83 for the purpose of lsecuring 'sus
pension means’17 against swinging from its proper orien
tation. ‘By employing similar rotatable connectors '24
pension member V1’7 for swinging with housing S5 about
70 (FIG. 4) in decks 14, 15, similar pressure responsive
the axis of fixed sleeve 84.
braking means are _provided for preventing movement
In -the ¿speciñc apparatus herein described, the >portion
--of nozzle 1 in azimuth and elevationduring:spraying with
of suspension member 17 between connector 83 and
said nozzle. Pressure responsive braking means, such ’as
right angle _ñtting 21 (FIG. 2) may form a conduit for
herein described, is preferred for use with apparatus
¿conducting liquid to >nozzle 1. Fluid under pressure
from tanks 9 'and 'pump 10 is ‘conducted through hose 75 wheren the device being controlled and aimed is a fluid`
4,6
8
means including a passage for transmission of fluid under
pressure to said nozzle and means responsive to fluid
pressure in said passage for securing said suspension means
nozzle because the braking action is effected automati
cally upon transmission of the fluid under pressure to the
nozzle. In apparatus wherein other devices are supported
and aimed as herein described, other mechanical or elec
trical brakes may be employed as will appear advantageous
to those skilled in the art.
It will also be’noted that by combining the Valve cori
trol button 93 with lever 5'3 of control unit 52, all func
against swinging thereof.
5. in spraying apparatus including a vehicle supported,
swingable and extendable boom and a spray nozzle, the
combination comprising; a platform including an azimuth
deck and an elevation deck respectively Supporting said
tions of the apparatus, including aiming the nozzle, turn
nozzle for rotation with respect to said platform about
ing the spray on and otf, and actuating the braking action
a iirst axis and a second axis normal thereto, driving
means carried by said decks for so rotating said nozzle,
for platform suspension means i7, may be controlled
from a single control station by one operator.
suspension means supporting said platform at the outer
end of said boom, a rotatable connector connecting said
ì
Although not a part of this invention, it will be obvious
that conventional pulley takeup means may be provided
in association with the extendable boorn 3 (FIG. 1) for
taking up the slack in the electrical cable 95 that extends
suspension means to said boom for swinging about a
generally horizontal axis parallel to said second axis and
with the center of gravity of said platform below said
horizontal axis, and control means remote from said
along said boom as well as for hose 11. Although the in-
platform, said driving means being responsive to said
vention has been described and illustrated, in detail, vari
control means for aiming said nozzle.
ous modifications that would occur as obvious to one
skilled in the art are intended to come within the spirit
en
and scope of the invention as deñned by the appended
claims.
I claim:
l. In spraying apparatus including a spray nozzle and
a swingable boom, the combination comprising: rotatable
means supporting said nozzle for rotation about a pair of
mutually perpendicular axes, driving means connected
to said nozzle for so rotating said nozzle about said axes,
manual control means remote from said nozzle and con
nected to said driving means for aiming said nozzle, and
means supporting said rotatable means and said nozzle
at the outer end of said boom and maintaining one of
said axes generally horizontal during swinging of said
boom.
_
2. In spraying apparatus including a spray nozzle and
a swingable boom, the combination comprising: rotatable
means supporting said nozzle for rotation about a pair of
mutually perpendicular axes, driving means connected
to said nozzle for so rotating said nozzle about said axes,
manual control means remote from said nozzle and con
nected to said driving means for aiming said nozzle, and
swingable suspension means supporting said rotatable
means and said nozzle at the outer end of said boom for
swinging about a generally horizontal axis above the center
of gravity of said rotatable means and said nozzle for
maintaining one of said perpendicular axes generally
horizontal during swinging of said boom.
3. In spraying apparatus including a spray nozzle and
a swingable boom, the combination comprising: rotatable
means supporting said nozzle for rotation about a pair of '
mutually perpendicular axes, driving means connected
to said nozzle for so rotating said nozzle about said axes,
manual control means remote from said nozzle and con
nected to said driving means for aiming said nozzle,
swingable suspension means supporting said rotatable
means and said nozzle at the outer end of said boom for
6. En spraying apparatus including a vehicle supported,
swingable and extendable boom and a spray nozzle, the
combination comprising: a platform including an azimuth
deck and an elevation deck respectively supporting said
nozzle for rotation with respect to said platform about
a ñrst axis and a second axis normal thereto, driving
means carried by said decks for so rotating said nozzle,
suspension means supporting said platform at the outer
end of said boom, a rotatable connector connecting said
suspension means to said boom for swinging about a
generally horizontal axis parallel to said second axis and
with the center of gravity of said platform below said
horizontal axis, and control means remote from said
platform, said driving means being responsive to said
control means for aiming said nozzle, said connector
including a passage communicating with said nozzle for
conducting fluid under pressure thereto and brake means
operable by fluid pressure in said passage to resist rota
tion of said connector.
7, ln spraying apparatus including a vehicle supported,
swingable and extendable boom and a spray nozzle, the
combination comprising: a platform including an azimuth
deck and an elevation deck respectively supporting said
nozzle for rotation with respect to said platform about
a first axis and a second axis normal thereto, driving
means carried by said decks for so rotating said nozzle,
suspension means supporting said platform at the outer
end of said boom, a rotatable connector connecting said
suspension means to said boom for swinging about a
generally horizontal axis parallel to said second axis and
with the center of gravity of said platform below said
horizontal axis, control means remote from said plat
form, said driving means being responsive to said control
means for aiming said nozzle, said connector including a
passage communicating with said nozzle for conducting
nuid under pressure thereto and brake means operable
by iiuid pressure in said passage to resist rotation of said
connector, a source of ñuid under pressure, conduit means
swinging about a generally horizontal axis above the center
connecting said passage with said source, a valve in said
of gravity of said rotatable means and said nozzle for
conduit, and said control means including a valve operator.
maintaining one of said perpendicular axes generally
8. In spraying apparatus including a vehicle supported,
horizontal during swinging of said boom, and means for 60
swingable and extendable boom and a spray nozzle, the
selectively securing said suspension means against said
combination comprising: a platform including an azimuth
swinging.
deck and an elevation deck respectively supporting said
4. In spraying apparatus including a spray nozzle and
nozzle for rotation with respect to said platform about
a swingable boom, the combination comprising: rotatable
means supporting said nozzle for rotation about a pair 65 a ñrst axis and a second axis normal thereto, driving
means carried by said decks for so rotating said nozzle,
of mutually perpendicular axes, driving means connected
suspension means .supporting said platform at the outer
to said nozzle for so rotating said nozzle about said axes,
end of said boom, a rotatable connector connecting said
manual control means remote from said nozzle and con
suspension means to said boom for swinging about a
nected to said driving means for aiming said nozzle, and
swingable suspension means supporting said rotatable 70 generally horizontal axis parallel to said second axis and
with the center of gravity of said platform below said
means and said nozzle at the outer end of said boom for
horizontal axis, control means remote from said platform,
swinging about a generally horizontal axis above the
said driving means being responsive to said control means
center of gravity of said rotatable means and said nozzle
for aiming said nozzle, said control means including a
for maintaining one of said perpendicular axes generally
horizontal during swinging of said boom, said suspension 75 pair of signaling devices, the driving means of each of
3,074,649
9
said decks being respectively responsive to one of said
signaling devices, a control lever mounting means carry
ing said lever and one of said signaling devices operatively
connected to said lever and supporting said lever for
swinging in a íirst plane for operating said one signaling
device, and means operatively connecting said lever to
the other of said signaling devices and supporting said
mounting means for swinging in a second plane normal
to said first plane for operating said other signaling device.
10
References Cited in the file of this patent
UNITED STATES PATENTS
1,087,634
1,835,132
Boyce _______________ __ Feb. 17, 1914
Anania ______________ __ Dec. 8, 1931
2,593,921
2,786,723
2,834,416
Robinson ____________ __ Apr. 22, 1952
Harsch ______________ __ Mar. 26, 1957
Becker _______________ __ May 13, 1958
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