US 2351376 A
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June 13, 1944.
gli 1V L. T. WARD SPRAYING DEVICE Filed July 7, 1941 l I '101 mlm:
BY azz/fezf//Qr gm, y Amy Patented June 13, 1944 SPRAYING DEVICE Lawrence T. Ward, Philadelphia, Pa., assignor to Knapp-Monarch Company, St. Louis, Mo., a corporation of Missouri Application July 7, 1941,seria1No. 401,337
My present invention relates to a spraying device which may be used for spraying insecticide or other fluids.
One object of the invention is to provide a device which may be used for spraying insecticide without the necessity of having a manual pump or the like to effect the spraying operation, the device instead using a bulb of compressed gas or the like to produce the necessary pressure to displace the liquid from a container therefor.
A further object is to provide an insecticide spray unit which may contain a quantity of insecticide sealed against evaporation and ready at any time for instant use by the mere depression of a lever on the device, the lever operating a valve mechanism to control the spray as desired.
A further object is to provide spraying mechanism wherein the liquid is displaced by gas under compression and is atomized by introduction of some of the gas into the liquid stream during the dispensing operation.
With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawing, wherein:
Figure l is a vertical sectional view through an insecticide spray device embodying my invention, the valve being shown in closed position and the apparatus being illustrated during the process of charging the vase with compressed gas from a Sparklet bulb or the like, and
Figure 2 is a similar sectional view showing the valve in open position and illustrating the action of the liquid and gas to effect the desired spraying operation.
On the accompanying-drawing, I have used the reference numeral I to indicate a suitable vase or container for liquid L, such as an insecticide. A removable head I2 is provided for the vase I0, the head being screwed on the vase with a gasket at I3 to eiect an airtight seal.
The head I2 has therethrough a passageway, indicated at P, in which is located a valve seat I4. A plug I5 is adapted to seat thereagainst under the bias of a spring I6. The plug I5 is provided at one end of a discharge tube T comprising a rst section II and a second section I8 coupled together as by a coupling nut I9. The sections I'I `and I8 are sealed relative to each other by a ground seat at 20.
The tube section I8 has a discharge nozzle 2| of any suitable shape.
mounted on the tube section I'I and serves as a lock nut for the coupling nut I9. It also serves as a shoulder against which the upper end of a lever L may engage for opening the valve, as shown in Figure 2.
The spring I6 is interposed between a closure nut 23 and a washer 24 on the discharge tube T and engages a head 25 thereof in which the plug member I5 is located. The Washer 24 serves as a seal so. that liquid through the valve will iiow through the bore of the discharge tube T instead ci past the spring I6 and out through the bore of the nut 23.
The passageway P at its extreme inner end receives a syphon tube 26 depending to a position where its lower intake end is located adjacent the bottom of the vase IU. The syphon tube 26 has a minute opening 2'I of a few thousandths of an inch diameter, which serves an important purpose, as will hereinafter be described.
The vase I0 and head I2 are adapted to be held in the hand of the user with the fingers engaging the lever L to depress it, as-shown in Figure 2. A rest member 28 is provided which forms a projection on the head I2 secured thereto by a screw 29. This projection is adapted to rest on the upper edge of the users hand between the thumb and rst nger. The` stop shoulder 28 thereby forms a convenient support for the spraying device when in use.
In the bottom of the vase I0, a fitting 30 is provided having a hollow piercing pin 3I. pin 3| is adapted to pierce a compressed gas bulb, such as a Sparklet bulb 32, when the bulb is forced against the pin by a holder 33 in a Well known manner. After the vase I0 is filled with the liquid L, the piercing operation is performed as illustrated in Figure 1, whereupon compressed gas passes upwardly in the form of bubbles 34 through the liquid L and fills the space above the liquid in the head I2. After the gas is discharged from A shoulder nut 22 is 55 the bulb, the bulb may be removed by unscrewing the holder 33 and the usual check valve in the fitting 30 will close to prevent escape of the liquid from the vase.
Whenever it is desired to use the spraying device, it is supported irl the hand, as already described, and the lever L depressed as in Figure 2, thereby causing the lever to pivot at point 34 on the head I2 and effect opening of the valve. The compressed gas in the head I2 will displace the liquid L upwardly through the syphon tube 26 and some of the compressed gas will slowly pass through the minute opening 2l, thereby mixing with the liquid and effecting atomiz'ation thereof The as it leaves the nozzle Il. Thus, the discharge fromthenozziewillbeinthei'ormotaspray rather than a needlelike stream ci, liquid.
by automatically cut oli and the liquid sealed against evaporation.
Somechangesmaybemadeintheconstruction and arrangement of the parts of my device without departing from the real spirit and purpose oi' my invention. and it is my intenon to cover by my claims any modiiled forms o! structure or use of mechanical equivalents which may be reasonably included within their scope without sacrincing any of the advantages thereof.
I claim as my invention:
1. A spraying deviceof the character disclosed comprising a container for liquid and gas under pressure, a passageway through a wall oi said container, a discharge tube in said eway having on its outer end a discharge nozzle and on its inner end a valve plug, a valve seat in said passageway, a nut threaded into said eway and located outwardly relative to said valve plug, a spring interposed between said nut and said plug to normally retain said -plug seated against said seat, a levervhaving one end surrounding said'discharge tube, a shoulder on said tube, said lever having an edge pivoting against said container at a point spaced from the axis of said tube, the surrounding portion of said lever directly engaging said shoulder to eil'ect outward movement of said discharge tube and thereby unseating ot said plug relative to said seat, and a syphon tube extending from said passageway to an intake position below the level of liquid in said container.
2. In a spraying device, a container for liquid and compressed gas for displacing the liquid, a passageway through a wall of said container, a discharge tube in said passageway having onfits outer end a discharge nozzle and on its inner end a valve plug, a valve seat in said eway, spring means tending to seat said plug against said seat, a lever having one end surrounding said discharge tube, a shoulder on said tube, said lever being provided with an edge portion which pivots against said container at a point spaced from the axis of said tube, the surrounding portion of said lever directly engaging said shoulder to eil'ect outward movement of said discharge tube and thereby unseating of said plug relative to said seat, and a syphon tube extending from said passageway to an intake position below the grippedintheusershand,arestproiectionon said container adapted to engage the upper edge of the users hand to support the container against slipping downward in the hand during use, and a syphon tube depending from saidpassageway into said container.
4. A spraying device comprising a vertical cylindrical container for liquid and for com gas to displace the liquid from the container, said container adjacent its top sloping upwardly and inwardly, a substantially horizontal passageway in the sloping part of said container, a valve seat in said passageway, a discharge tube projecting from said passageway and having a dischargenozzle at its outer end, a lever for controlling the now of liquid and gas to said discharge tube and having an operating portion extending downwardly along said container to be gripped by the flngers'of the user as the spraying device is used, a rest projection on the sloping part of said container adapted to engage the users hand to'support the container during use, and a syphon tube depending from said passageway into said container.
5. In a spraying device, a vase, a head thereon, a passageway through said head, a discharge tube in said passageway having a discharge nozzle, a valve plug at the inner end of said discharge tube, a valve seat in said paageway, a spring in said head and surrounding said valve 45 plug to bias it to seat against said valve seat, a retainer for said spring, a lever surrounding said level of liquid in said container, said syphon tube having an opening therein above the level of the liquid to receive gas from said container.
discharge tube, said discharge tube having a shoulder for said lever to engage said lever havg ing an edge portion to engage said vase for moving the discharge tube to unseat said valve plug from said valve seat when the lever is swung to pivot at the point of engagement at said edge with said vase, anda syphon tube extending from said passageway to a position adjacent the bottom of said vase, said vase and head being adapted to contain liquid and a compressed gas, and said syphon tube having an opening located above the level of the liquid to receive compressed gas to mix with the liquid in the syphon tube and eiect atomization of the. liquid at said nozzle.
LAWRENCE T. WARD.