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Патент USA US2124989

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July 26, 1938.
J. E. SMITH
2,124,989
CEMENT SPRAY DEVICE
Filed‘ March 12, 1936
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ATTORNEY
Patented July 26, 1938
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2,124,389
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CEMENT SPRAY DEVICE
John E. Smith, Los Angeles, Calif.
Application March 12, 1936, Serial No. 68,361
11 Claims.
My invention relates primarily to‘ a device
for applying cementor like plastic materials in
which the cement or the like is transported in a
dry state through a hose and hydrated at the
‘5, point of a nozzle and then applied in a spray
form, such devices being variously called “cement
guns” etc, and its prime object is the provision of
means, in such devices, whereby the ?uid being
supplied to the stream of aggregates passing
10 through the nozzle may be maintained at a rela
tively high pressure at least not lower'than the
line pressure, while permitting the volume to be
varied.
Another object is to provide means of the
15 above character whereby the ?uid being com
mingled with the stream of‘ aggregates will be
caused to “fan out” or spread as it passes out
of the jet into the nozzle, this “fanning out”
or spreading being at right angles to the flow
of the stream of aggregates, the result being a
substantially perfect mixture of ?uid and ag
gregates with a resultant uniform hydration.
Heretofore in the use of so called “cement
guns” etc., in applying cement and like plastic
25 materials, ?uid has been added to the stream of
aggregates, passing through the nozzle, through
a plurality of openings or jets positioned radi-.
ally around the nozzle and angled in the direc~
tion of flow of the aggregates and, when it was
30 desired or found necessary to alter the proportion
of ?uid and aggregates, the flow of .?uidwas
increased or decreased by means of avalve- in the
main supply.
.
a
a
This, of course, decreased or increased the
pressure of the jets passing into the nozzle with
the result that the ?uid, in the case of decreased
pressure, would fail to penetrate su?‘iciently into
the stream of aggregates to permit a thorough
commingling, the result being that the outer
40 surface of the stream of aggregates would be too
wet, and the inner portion too dry.
In the use of my invention I provide means
for varying the capacity or transverse area of the
‘jet openings as individual openings so that as the
45 ?uid supply is varied the transverse area or ca
pacity of the individual jet openings is also
varied and the pressure of the ?uid passing
therethrough maintained or adjusted as desired
and at the same time the ?uid as it passes out
50 of the outlets is caused to. “fan” or spread fan!
wise transversely of the stream of ‘ aggregates.
Other objects and advantages will appear here
inafter and, While I have shown and will de
scribe the preferred form of my invention, it
55 will be understood that I do .not limit. myself to
(or. > 91-44)
such preferred form but that various changes and
adaptations may be made therein without de~
parting from the spirit of my invention.
In the drawing accompanying and forming
a part hereof:
Fig. 1 is a side elevation of a cement gun
constructed according-to my invention.
Fig. 2 is a left hand elevation of Fig. 1.
Fig. 3 is a central transverse section through
10
my improved ?uid control.
Fig. 4 is a central vertical section through
Fig. 3 and taken at right angles thereto.
Fig. 5 is a detail of a portion of Fig. 3.
Fig. 6 is a fragmentary detail of a modi?ed
15
form of my invention.
Referring to the drawing my device comprises
an outer housing 8 provided with an interior
?uid chamber 9. Projecting from the lower por
tion of the housing 8, is an integral boss is
through which is provided an opening it, inte~ 20
riorly screw threaded for connection to a street
L i2 by means of which said chamber is con
nected to. a ?uid supply pipe l3. A control valve
(not shown) is inserted in the supply pipe line,
the object of which will be obvious.
'
25
Provided in the opposite sides it and it of the
housing 3 are openings l6 and ii, which open
ings are concentric relatively to each other, and
mounted at its ends in these openings it and
ii, held positioned by any suitable or desired
means, such as soldering, friction or otherwise,
is the jet-opening ring or carrier is, in which
are provided the radially extending jet openings
26}, of which I have shown eight, equally spaced,
but any other number may be used as found
necessary or advisable, and any desired spacing
may also be used. Provided through the carrier
69 is a passage 2! through which the aggregates
are forced during admixture with the ?uid.
Mounted within the chamber 9 to snugly fit
around the ring or carrier i9 is the jet adjust
ing valve member 22, through which are provided
jet openings 23 adapted to coincide with the
openings 26 of the ring l9 and provide a con
tinuous passage from within the chamber 9 to 45
the passage 2!. Extending upwardly from the»
side of member 22 is an abutment 21!, and this
abutment projects through an elongated open
ing 25 in the wall of housing 8 and terminates
at a short distance thereabove.
Detachably '
mounted upon the housing 8 to inclose the elon
gated opening 25 and the abutment Ell-is a closure
cap 26, held positioned by screws or studs 2'! and
nuts 28, soldering or the like being used if found
necessary'or desirable to make the connection
2
2,124,989
or union therebetween watertight. Cap 26 is also
provided with a removable closure plate 29.
Pro
vided in opposite ends of the cap 29 are bosses
33 and 3| and screw threadedly mounted in the
Ul boss 30 is an adjusting screw 32, provided on
its outer end with a hand wheel 33, a packing
gland 34 being provided for insuring a ?uid tight
connection between the projecting end of the
screw 32 and the housing or cap 26. Screw
threadedly mounted in the boss 3| is an adjust
ing sleeve 35, provided on its outer end with a
lock nut 36 by means of which said sleeve may
be locked against movement relative to boss 3|.
Projecting through the sleeve 35, concentric
therewith and in screwthreaded engagement
therewith is an elongated stop, member 31, the
inner end of which acts to limit the rotative
movement of the member 22 by means of the
abutment 24. The other end of the stop mem
ber 31 projects beyond the outer end of the
sleeve 35 and is squared or other wise adapted
for the reception of or engagement by a suit
able tool for rotating the same.
A look nut 38 is provided for the member 31
whereby the same may be locked against rela
tive movement with sleeve 35. Coiled around
the stop member 37 between the inner end of the
sleeve 35 and the adjacent side of the abutment
24 is a coil spring 39 which normally acts to
30 hold the abutment 24 against the adjusting
screw 32.
While I have shown and described the jet
openings 20 and 23 as being circular it will be
understood that I do not intend to con?ne myself
to any speci?c contour but that I may also use
slitted apertures extending radially or trans
versely or in any other manner desired or found
advisable.
(See Fig. 6.)
In the operation of my device should it be de
40 sired to vary the area of the jet openings, the
rotation of the adjusting screw 32 by means of
the hand wheel 33 will rotate the jet adjusting
valve member 22 and move its jet openings 23
into or out of register with the jet openings 20,
according to whether it is desired to increase or
decrease the area.
Interiorly screw threaded extensions 40 and 4|,
projecting from the sides of housing 8 and con
centric with passage 2| provide means for con
nection to the nozzle 42 of any suitable con
struction and the aggregate supply pipe or tube
43.
Having described my invention'what I claim is:
1. In a device of the character described a
housing, having a ?uid chamber therein and a
connection from said ?uid chamber to a ?uid
supply, a detachable annulus rigidly mounted in
said housing and having a central opening there
through and a plurality of radially extending
60 ?uid passages connecting said central opening
to said ?uid chamber, an adjusting member
mounted in said ?uid chamber to surround said
annulus and being provided with a plurality of
radially extending fluid. openings there adapted
65 to register with the said ?rst ?uid passages, and
means for rotating said adjusting member to
bring the ?uid openings therein into or out of
register with the ?uid passages of said annulus
and restrict or increase the ?ow of ?uid there
70 through.
2. In a cement spray device, a housing having
a passage therein for dry aggregates, a ?uid
chamber in said housing and having a plurality
of jet ori?ces opening into said passage, a valve'
75 member movable in said chamber for simul
taneously varying the area of all of said jet
ori?ces, and means operable exteriorly of said
housing for so moving said valve member.
3. In a cement spray device, a housing having
extending therethrough a passage for dry aggre
gates, a ?uid chamber having jet ori?ces ar
ranged to direct jets of ?uid under pressure
into said passage, means for establishing con
nection of said chamber with a source of ?uid
under pressure, a valve member movable relative 10
to said ori?ces for simultaneously varying the
area of said ori?ces, and means for moving said
valve member.
4. In a cement spray device, a housing having
extending therethrough a passage for dry aggre 15
gates, a ?uid chamber having jet ori?ces opening
into said passage, means providing for connec
tion of said chamber with a source of ?uid under
pressure, a valve member having a plurality of
openings adapted to register with and communi" 20
‘cate said jet ori?ces with said chamber, and
means for moving'said valve member to simul—
taneously vary the volume of the ?uid jets.
5. In a cement spray device, a housing having
a passage'for dry aggregates, a ?uid chamber lo 25
cated between the ends of and surrounding said
passage and having ?uid jet ori?ces opening
into said passage, means providing for connec
tion of said chamber with a source of supply
under pressure, means at opposite ends of said 30
housing and said passage therein providing for
connection of the housing with a nozzle and a
dry aggregate feed conduit, a rotary valve mem
ber in said chamber and having openings which
are adapted to register with said jet ori?ces and 35
to vary the ?uid volume of the jets, and means
operable exteriorly of said housing for turning
said valve member.
6. In a cement spray device, a housing having
a passage through which dry aggregates are
passed, a ?uid chamber adjacent said passage and
having jet ori?ces arranged to discharge into
said passage, a movable valve member having
openings adapted to be brought into and out of
registration with said ori?ces upon movement of 45
said valve, and means operable exteriorly of said
housing for moving said valve.
7. In a cement spray device, a housing having
a passage therethrough for dry aggregates, a
?uid chamber located between the ends of said 50
passage and including an annular wall which is
removably mounted in said housing, said annular
wall having a plurality of jet ori?ces arranged
to discharge into said passage, an annular valve
member surrounding and being rotatable relative 55
to said annular wall and having openings there
in adapted to communicate the said ori?ces with
the interior of said chamber, and means for ro
tating said valve member.
'
8. In a cement spray device, a housing having 60
a passage for dry aggregates, a ?uid chamber
in said housing, means providing for connection
of said chamber with a source of ?uid under
pressure, and means for directing jets of ?uid
from said chamber into said passage including a 65
stationary member having ori?ces therein, a mov
able member having openings adapted to es
tablish communication of said ori?ces with said
chamber, and means operable exteriorly of said
housing for moving said movable member.
70
9. In a cement spray device, a housing having
a passage for dry aggregates, a ?uid chamber in
said housing, means providing for connection of
said'chamber with a source of ?uid under pres
sure, and means for directing jets of ?uid from
2,124,989
said chamber into said passage including a sta
tionary member having ori?ces therein, a mov
able member having openings adapted to estab
lish communication of said ori?ces with said
chamber; and means operable exteriorly of said
housing for moving said movable member, said
stationary member being removable through said
passage.
10. A cement spray device comprising a hous
10 ing having a passage through which dry aggre
gates are passed, a ?uid chamber adjacent said
passage, adapted for connection with a source of
?uid under pressure and having a jet ori?ce for
discharging ?uid into said passage, and means
for varying the volume of the jet while maintain
ing the normal ?uid chamber pressure of the
?uid passing therethrough comprising a valve
3
member movable relative to and cooperating with
said ori?ce and means operable at will upon the
exterior of said housing for adjusting said valve.
11. A cement spray device comprising a hous
ing having a passage for dry aggregates, a fluid
chamber adjacent to said passage having a jet
ori?ce for discharging ?uid into said passage,
means adapted for connecting said chamber with
a source of ?uid under pressure and for maintain
ing a substantially uniform pressure therein at
least lower than the line pressure from said
source, and means for maintaining a relatively
high jet pressure while varying the volume of
the jet including a valve associated with said
ori?ce and valve adjusting means arranged for 15
actuation during cement spraying operations.
JOHN E. SMITH.
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