US2127006A - Sprayer - Google Patents

Description

Aug. 16, 1938.

J. PATTERSON SPRAYER Filed May 23, 1936 2 Sheets-Sheet 2 I 5 M 5 5 a M i v v a 5 7 Z 4 7a 5.5 52 "x y u l \J z H i 5 I M, Z m M Patented Aug. 16, 1938 amps SPRAYER Joseph W. Patterson, Tulsa, Okla, assignor to Volume Sprayer Manufacturing Company, Inc., Tulsa, (ikla, a corporation of Oklahoma Application May 23, 1936, Serial No. 81,346

7 Claims.

This invention relates to new and useful improvements in sprayers.

One object of the invention is to provide an improved sprayer for spraying various liquids, 5 such as insecticides, paints and lacquers, as well as oil, or other fluids.

An important object of the invention is to provide an improved sprayer of the continuous sprayer type, having the usual liquid container attached to the barrel of said sprayer, the con struction being such that the container may be filled through the end of the barrel, whereby the usual inlet on the container may be eliminated which makes for a muchcheaper and more simple device.

A further object of the invention is to provide an improved sprayer wherein the ejection tube is mounted in a fixed position and having an improved nozzle, whereby said nozzle is firmly mounted against the end of the tube at all times, thereby assuring a non-clogging leak-proof ejection nozzle.

Another object of the invention is to provide an improved nozzle for a sprayer which is selfaligning with relation to the end of the ejection tube and which is also expansible so as to com pensate for a variation of the distance between said tube and nozzle, whereby bending or twisting of the tube, by engagement of the nozzle therewith, is obviated.

Another object of the invention is to provide a sprayer of the continuous sprayer type which is provided with a check-valve of an improved and simple construction which is readily secured in the sprayer barrel; the sprayer also including an improved liquid container constructed in two halves, which halves maye be soldered to each other and then soldered, or otherwise secured to the barrel; the entire construction of the sprayer being cheap in manufacture and readily assembled. I

A construction designed to carry out the invention will be hereinafter described, together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown, and wherein:

Figure 1 is a side elevation of the sprayer, constructed in accordance with the invention,

Figure 2 is an enlarged vertical, sectional view showing the sprayer head and a liquid container,

Figure 3 is a plan View of the forward portion of the sprayer as shown in Figure 1,

Figure 4 is an enlarged sectional view of the forward end of the sprayer barrel,

Figure 5 is a similar View showing the packing ring or gasket removed,

Figure 6 is an enlarged front elevation of the barrel,

Figure '7 is an enlarged transverse, vertical, sectional view taken on the line 1-1 of Figure 2, and

Figure 8 is a face View of the check valve.

In the drawings, the numeral Ill designates a sprayer barrel having a plunger I I slidable therein. A plunger ro-d I2 has one end secured to the plunger while its opposite end is supported by, and extends through a cap I3 which closes one end of the barrel. A suitable handle I4 is fastened on the outwardly extending end of the rod I2, whereby the plunger may be readily reciprocated within the barrel. Although a manually operated plunger is shown in the drawings, it is to be understood that the invention is not to be limited to this particular type.

The opposite, or forward end of the barrel Ill is open being externally threaded as shown at I5. An inwardly extending annular lip I6 is formed at the end of the barrel. This open end of the barrel is arranged to be closed by a cap I! which is screwed onto the threads I5, a suitable packing gasket I8 being interposed between the underside of the cap and the annular lip I6.

A suitable container, or receptacle I9 for receiving the liquid to be sprayed is secured to the underside of the barrel II at a point just behind the open end of said barrel. This container may be constructed in any suitable manner, but is preferably made in two sections or halves a and b. Each section is substantially semicircular in cross section, whereby when the sections are placed together and soldered, or otherwise fastened, a container having a substantially circular shape in cross section (Figure 2) is had. It is noted that the container has a width which is much greater than the diameter of the barrel II] as is clearly shown in Figure 3, and such arrangement permits a large container for holding the liquid to be provided on the barrel. By making the container of light metal, or other similar material, in this manner, it is obvious that a most inexpensive structure is produced. The container does not have any inlet and, therefore, the expense of forming a neck and cap, as is the usual practice, is eliminated. The upper central portion of the container is cut away at 29 so as to form a recess into which the lower curved end of the barrel will fit. The container may then be soldered, or otherwise suitably fastened to the barrel, whereby an integral structure is produced By observing Figure 2, it will be seen that when the barrel is placed within the recess 20 and fastened to the container, the wall of the barrel will form a closure for the cut-out portion of said container. To establish communication between the interior of the container l9 and the interior of the barrel W, said barrel is provided with an opening 2! whereby air Within the barrel may pass into the container. An ejection tube 22, which is preferably constructed of brass, or other non-rustable or non-corrodible metal, and which has a general angular shape, has its vertical leg 22 extending downwardly through the wall of the barrel it into the container. The lower end of the tube terminates just short of the bottom of said container. The tube is soldered, or otherwise secured to the wall of the barrel I0 whereby it is rigidly supported in position. The horizontal leg 23 of said tube extends axially Within the barrel l0 being directed forwardly towards the open end of said barrel. This horizontal leg is of such length that its forward end is arranged to be engaged by the cap 6 i when said cap is in position on the end of the barrel.

For forming a pressure chamber in the forward end of the barrel ill, a disk 24 having substantially the same diameter as the barrel is located within said barrel at a point just behind the opening 2 i. The disk is formed with an annular flange 25 which, when said disk is within the barrel, lies contiguous to the inner wall of said barrel. For rigidly securing the disk in position, a. plurality of openings 26 are provided in the wall of the barrel and these openings are in alinement with the annular flange 25 of the disk, whereby solder, or other similar material may be introduced into said openings and will serve to rigidly fasten the flange to the barrel. It is noted that the disk is inserted within the barrel prior to said barrel being attached to the container it.

From the above, it will be seen that the disk 24 forms a partition between the rear portion of the barrel l9 wherein the plunger reciprocates, and the forward end of said barrel which communicates with the interior of the container I9. For permitting the plunger H to force air into the chamber 2'! formed between the disk 2-; and the cap II, the disk is provided with an axial opening 28. This opening is arranged to be closed by a check valve 29. The valve is normally held in a seated position by a spring member 30 having a general M shape. The free ends of the spring engage the disk while its center portion surrounds a headed shank 29' formed integral with the valve 29 (Figure 8). This spring exerts its pressure to normally hold the valve 23 in its closed position.

When the plunger II is moved forwardly or towards the disk 24, the air pressure will force the valve 29 open under tension of the spring 33 so that the air will escape into the chamber 21 formed at the end of the barrel From this chamber the air will pass downwardly through the opening 2| in the wall of said barrel and will be exerted against the liquid within the container I9, whereby the liquid will be forced upwardly through the ejection tube 22 and outwardly through an axial nozzle 3| which is formed on the cap I 1. Some of the air within the chamber 21 will also escape through openings 23 which are provided in the extreme forward end of the ejection tube 22, and the escape of this air through these openings and outwardly through the nozzle 3|, with the escaping liquid, will make for perfect atomization of said liquid. By varying the size of the openings 23 it will be obvious that the escape of air through the chamber 21 through the nozzle 2| can be readily controlled.

Any suitable cap H which has an axial nozzle 3| against which the ejection tube may rest may be employed. However, I prefer to use the type of closure which is clearly shown in Figures 4 and 5. This cap comprises a threaded collar 32 which is provided with an inwardly projecting annular flange 33 at its outer end. A corrugated disk 34 having a diameter which is slightly smaller than the internal diameter of the collar 32, is confined beneath the flange 33 of said collar. This disk is formed with an axial nozzle 3|. With this arrangement the packing gasket I 8 is then inserted within the collar and serves to retain the disk 34 against said flange. It is specifically noted that the disk 34 has no connection with the collar 32 or its flange, and since this disk has a smaller diameter than the collar it may undergo a transverse movement with relation thereto.

In applying this type of cap to the end of the barrel l9, it is obvious that since the gasket I8 is inserted within the collar, it is only necessary to thread said collar on the barrel. The packing gasket I8 is of such thickness that when the cap is screwed tightly on the end of the barrel, the interior of the nozzle snugly engages the forward end of the ejection tube 22. In case the ejection tube is not exactly in axial alinement within the barrel It, the corrugated disk 34 will readily adjust itself so that the nozzle 3| thereof snugly engages the end of the tube. With the collar tightened down and the gasket 13 between the disk and the end of the barrel H), the disk is in its normal position.

The disk 34 is not only capable of a limited transverse movement with relation to the collar 32 but due to the corrugations throughout its surface it is also expansible. Therefore, in case the gasket l8 should become lost, and the collar 32 screwed onto the end of the barrel without said gasket therebetween, the disk 34 would be expanded to the position shown in Figure 5. There'- fore, the pressure incidental to the tightening of the cap on the barrel will not be exerted against the end of the tube. 22 and therefore, danger of bending or twisting the tube out of its proper shape is eliminated. In the event that a new gasket is again interposed between the collar and the barrel, the disk 24 will return to its normal unexpanded position and will, under all conditions, be properly seated against the end of the tube, whereby efiicient spraying will be had. I

The operation of the device is obvious. As the plunger I is reciprocated within the barrel l0, air is forced into the chamber 21, whereby a pressure is built up in this chamber. The pressure of the air within said chamber forces the liquid outwardly through the tube 22 and nozzle 3| Some air from the chamber will escape through the slots 23 in the forward end of the tube to provide atomization of the ejected liquid. The chamber is of such size that a comparatively high pressure is built up therein. Therefore, while the plunger l is on its back stroke there is sufficient pressure within the chamber to continue the spraying of the liquid until the plunger begins its forward stroke to supply more air.

The simplicity of construction of the sprayer,

together with the small number of parts employed, makes for reduced manufacturing costs. In assemblying the sprayer, the disk 24 which carries the check valve is first inserted into the barrel so that its annular flange 25 is alined with the openings 26. Solder, or other fastening material is then placed in these openings to secure the disk in place. The container I9 being free from any inlet may be constructed in two halves, a and b, and readily fastened together. The ejection tube 22 is then soldered in place within the barrel iii, after which the barrel is secured to the container. The cap I! is then placed on the end of the barrel to close the same and the nozzle 3| due to its being carried by the adjustable disk 34 will readily engage the end of the nozzle. The device is then ready for use. It is pointed out that a particular feature of the invention is the elimination of the cap and inlet on the container l9 which has been the usual practice. When it is desired to fill the container, it is only necessary to remove the cap I1, place the barrel H] on end, and pour the liquid into the open end of the barrel. The liquid will flow from the barrel through the opening 2| and into the container. The elimination of the inlet on the container itself greatly reduces the cost of said container.

What I claim and desire to secure by Letters Patent, is:

l. A sprayer including, a receptacle, 9. cylindrical air storage head mounted on top of the receptacle, a removable nozzle extending from one end of the head, a valved closure at the opposite end of the head, means for supplying air under pressure to the head, and an angular ejection tube open at each end and extending upwardly from the lower portion of the receptacle into the head and forwardly through the head to the nozzle, said tube being secured in the wall of the head the removability of the nozzle permitting the receptacle to be filled through the head.

2. A sprayer including, a receptacle, an air storage head having one end open and communicating with the interior of the receptacle, an ejection tube extending from the lower portion of the receptacle into the head and extending forwardly in the head to the open end thereof, and a nozzle removably fastened on the open end of said head and engaging the tube, the removability of the nozzle permitting filling of the receptacle through the head, the nozzle being capable of limited lateral movement to permit axial alinement thereof with the tube.

3. A sprayer including, a receptacle, an air storage head having one end open and communicating with the interior of the receptacle, an ejection tube extending from the lower portion of the receptacle into the head and extending forwardly in the head to the open end thereof, and a corrugated nozzle removably fastened on the open end of said head and engaging the tube, the removability of the nozzle permitting filling of the receptacle through the head, the nozzle being capable of limited lateral movement to permit axial alinement thereof with the tube.

4. A sprayer including, a receptacle constructed of two sections, an air storage head having its ends open mounted on and communicating with the receptacle, said head having a row of annular openings located in its wall, a flanged disk closing one end of the head, said disk being held in place by solder passing through the openings in the head and contacting the flange of the disk, a removable nozzle closing the other end of the head, and a bent ejection tube open at each end and extending upwardly from the lower portion of the receptacle into the head and forwardly through the head to the nozzle, the removability of the nozzle permitting the receptacle to be filled through the head.

5. A sprayer including, a receptacle, an air storage head having one end open and communicating with the interior of the receptacle, an ejection tube extending from the lower portion of the receptacle into the head and extending forwardly in the head to the open end thereof, a flexible disk extending across the open end of the head, a nozzle located axially of the disk and engaging the tube, and means for holding said disk in position.

6. A sprayer including, a receptacle, an air storage head having one end open and communicating with the interior of the receptacle, an ejection tube extending from the lower portion of the receptacle into the head and extending forwardly in the head to the open end thereof, a corrugated disk extending across the open end of the head, a nozzle located axially of the disk and engaging the tube, and a collar threaded on the head and engaging the disk for holding the same in position, said disk having a smaller diameter than the collar, whereby it may undergo a limited trans verse movement with relation to the tube, the corrugations permitting expansion of the disk.

7. A sprayer including, a receptacle, a cylindrical air storage head mounted on top of the receptacle, a removable nozzle closing the outer end of the head, a disk closing the inner end of the head, and having an opening therein, a valve for closing said opening, a shank on the valve, a spring engaging the shank and having its free ends secured to the disk for normally holding the valve seated, and an angular ejection tube open at each end and extending upwardly from the lower portion of the receptacle through the wall of the head and forwardly through the head to the nozzle, and means for fastening the tube to the wall of the head at the point where said tube extends therethrough.

JOSEPH W. PATTERSON.

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