US2460545A - Spray gun - Google Patents

Description

W- M. SPRENG SPRAY GUN Feb. L @Q49 2 Sheets-Shes?, l

Original Filed June 15', 1940 A H/aRA/Eys W. M.- SEHEN@ Feb i? 211949,

SPRAY GUN 2 Sheets-Shea?. 2

i Original Filed June l5, 1940 Patented Feb. l, 1949 SPRAY GUN Warren M'. Sprang, Ashland; fOhio, assigner to f The F. E. Myers & Bro. Company,fAshland,

Ghia.' acorporation-of Ohio Original application June 15, 1940, Serial No. v345,519. 4Divided-and this application August 7, 1942, Serial lN01 453,973

is only one grip provided andthat' appears Aat.

the shut-off end, but there is nov provision for adjusting theamount of shut-olf to: accommodate wear. Neither isA there 'any provision fior adjusting the maximum opening-oi the valve at the shut-off end, or. the tightness with Awhich the valve is clamped on its seat. Y

The entire Weight of the long barrel, assuming that trees are being sprayed and 'call .for ya 'considerab-le length of barrel, is carried-:solely: :by the grip atthe shut-off and.' in casesprayzfiuids of considerable pressure and velocityarebeing handled bythe gun, the user of therdevi'ce nds the spraying work exhaustive.

Again, in case it is desired t'oclrange the size of the spray in guns of the-'unimproved type, it is usually necessary to remove 'the nozzle for the purpose of replacingthe apertured dise the nozzle by a disc .having .a diierent sizedopening and the work of making this changeI can be accomplished only while the spray gun. is not in use.

In the parent application case is a division thereis disclosed an improved spray gun in which two lgrips are employed one of the grips being positioned at the end of the' barrel and constituting an improved trigger structure and .the other of thegrips is positioned intermediate the ends of the barrelfwhere it canbe readily held by the handof. the user. .There-is provided a rsimple and sturdy mechanism'controlled by the last mentionedhandle for regulating the character of the supply `ejected.bythe nozzle and the barrel. Thus, the Lsupply may be controlled whileV thegun is in continuous use andthe samevr device that regulates the spray also serves as a second grip for supporting the barrel.

The invention covered by this divisional application .is directed more especially to the spray end ofthe gun and mechanismvby whichthe intermediately positioned grip handler can control the charactero the spray. y

Other objects and .features..will. be apparent-.as

of which 4the present 3 claims. (ci. a99- 112) 2 the `following specifica-tion is perused in connectionwith the accompanying drawings, in which:y

Figure l represents a longitudinal cross-section of the 'complete gun.

Figure 2 `is a fragmentary longitudinal section of the. nozzlein the barrel, also showing the intermediate grip handle and the mechanism for controlling the Asize of the whirl chamber at the nozzle. This figureshows a nozzle in which the whirl chamber is of minimum size.

yFigure 3 .is a View similar to Figure 2 but illustrating theA nozzle as having been/moved tov a position to: give the maximum size of opening.

AFigure 4 is a plan view taken along line 4 4 and looking in the direction of the arrows shown in Figure' 2.

:Figure 5 is a sectional view taken along line 55in lFigure 2.

Figure 6` is a similar view taken along line 6-6 in Figure 3.

Referring more particularly to Figure l, the improved spray gun is constituted essentially of four main parts, namely, the barrel which is generally designated by the reference character l,

4thenozzle indicated 2 and positioned at one end of the. barrel, the. trigger :shut-nii 3 .at the other end of the barrel, and the spray control mechanism 4 positioned intermediate the ends of the barrel..

The barrel i ris made up of as many lengths of piping as-may be desired and, as indicated, there are Itwo lengths formed by the tubing 5 which is screwed las. at 6 into the tubing of larger diameter indicated at 1.

The nozzle 2`consists of a head casting or screw cap 8. havingl an hexagonalhead indicated at 9, and a bore 'l0 which tapers down to a smaller opening indicated at ll (Figures 2 and 3). There isa cap |'2:which screws over a small diameter portionof themember 8, this cap serving to clamp a .pai-r oi Washers i3, I4 to the right hand end of the member 9. The washer E3 is made of rubber and constitutes a gasket, and the washer i4 is composed of a hard non-corrosive metal having a very small opening I5 through which fluid issues as a spray. Y

The `trigger shut-off 3 may be of any suitable material .butas illustrated is `formedV essentiallyof The latter is also lpro-vided with a stop Kfor-the trigger handie 23; I The lower surface of 'the :handle l'l and the upper surface of the' trigger handle V23 are preferably so shaped `that :when the composite handle is gripped ythe 'twoy sure so that the flow of the liquid is controlled y by the movements of the trigger 23. Inasmuch as.

the present invention is not directed especially to the handle mechanism, no further description of this device app-ears necessary or desirable.

elle end of gun Within the head casting 8 and also extending within the pipe l, there is a whirler mechanism comprising a cylindrical member 50 having a countersunk opening 5I at one end and terminating at the other end in a threaded extension 52. The cylinder 5G is provided with a plurality of angular slots 53 (Figure 6) which conveniently may be sawed into the Wall of the cylinder.

The threaded end 52 of the member 50 is received in the right hand end of a vane-shaped member, the vanes oi which there may be four, as indicated at 54 in Figure 5, extending throughout most of the length of the member. TheV dis.- tance across each pair of Yoppositely disposed vanes is only slighly less than the internal diameter of the barrel l, so that the vanes serve to center the cylinder 5B with respect to the ,bore I0. The left hand end of this member terminates in a flat portion indicated at55 (Figures 1 and 4), which is provided with a transversely extending slot 56. This slot receives a pin 5? extending upwardly from, and integrally secured to a plate 58 which forms a part of a cylindrical stem 59. -Y

The plate 58 rests on the upper surface of a hollow cylindrical member 56, which is closedA at the lower end except for an opening through which the cylindrical stern 59 extends. The cylinder 60 is provided with an outwardlyl extending ange 6I and a threaded portion 62 Awhich'is screwed into an internally threaded boss 63 extending downwardly irom the pipe or barrel l.

There is a compression spring 54 loosely surrounding the stem 5S and contained within the cylinder 60, this spring resting on the washer 54' and packing material 65. The'lower ,end lof the stem 5S is received in an opening formed-at the upper surface of a handle grip 66, the set screw 61 serving to secure the handle 56 to the stem. The handle is hollow, and the lower end is left open in order to drain orf small amounts of uid which might leak past the under side of the plate 58 and the washer 64 and through the packing 65. It will be noted in this connection that the spring 64 bears downwardly against the packing G5 thus tending to maintain the packing in a tight condition and preventing any substantial amounts of iiuid from passing through the handle,66. Y

rOperation of the nozzle and its adjustments through the langular slots 53 into the bore IIl` and emerge from the gun at the small opening I5. '75

Thepurpose of the vanes154 is to straighten out 4 the stream, i. e. to eliminate any undesired whirl or eddy current motion within the tube I.

The effect of passing the solution through the angular slots 53 is to cause the stream to be given a rapid whirl so that when the solution is ejected at the opening I5 with great vforce, the Solution particles constitute a whirling mass, which as will be pointed out hereinafter, may be controlled all the way from a mist form to a coarse straight stream. The amount of the whirl is determined by the angularity and number of slots 53, also by the pressure of the fluid in the pipe l. The

degree with which the uid is broken into ne particles, andthe neness of these particles, i. e. the state ofthe mist is determined by the distance that the cylinder 55 penetrates the bore III. As the cylinder 5l) is moved to the left, greater quantities of the fluid are permitted to pass Without obstruction into the b ore Il) so that the stream emitted at the opening I 5 is a straight spray with greater carrying power than a stream in mist form. The cylinder 5U is adjusted longitudinally by rotating the handle 56, which causes the pin 51 to rotate about the axis of the stem 59 and to carry with it the attened portion 55 of the'vaneshaped member. l

Thus, when the handle 65 is rotated from its position shown in Figure 2, the pin 51 in eiect moves to the left until it reaches its maximum left hand position, shown in'Fi'gure 3 corresponds to a half revolution turn 'of the handle 66.

In the normal operation of the spray gun the user will grip the handle 66 with his left hand and the combined trigger 23 and handle I'! with his right hand,` directing the barrel at the position which itA is desiredV to ycover with the spray solution, and the handle in the left hand can be turned giving the exact type of spray that is desired.

It will be understood that the mist form of spray is desirable when the gun is placed close to the plant or tree being sprayed and wide coverage is desired, whereas the coarse or straight form of stream is desired when long throw' is necessary, as when spraying the tops of trees. Consequently, by simply'turning the hand grip 66 through an angle of less than 180 complete control of the character of the spray is obtained all the way from a ne mist form to a straight or long distance carrying stream.

In order to reduce the weight of the sprayV gun as much as possible, and to eliminate corrosion, it is desirable' to make most of the parts of aluminum, by casting. Those parts which areV sub- Y jected to the Vgreatest wear, for example, the spray'adjusting mechanism 57, 58, 59 and 60 are made of a hard metal, such as brass or bronze.

It will be further evident that there are abso-A and the position of the adjusting handle 66 af` fords a natural and easy position for the operator to hold the gun, at vthe same time giving the operator a rm grip on the gun against the recoil resulting-from the discharge of the liquid at high pressures.

While l have explained the improved spray gun from the standpoint of spraying plants, etc.. itA

will be understood that the gun may be used .for spraying other liquids on other surfaces, such as spraying cold water, paint, or distributing of etching'acids over metal surf-aces.

It will be understood that I desire to comprehend within my invention such modifications as may come within the claims and scope of my invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A spray gun comprising a barrel, said barrel including a first and a second length of tubing, said tubing lengths being straight from end to end, means on adjacent ends of said tubing lengths for attaching them together in axial alignment whereby to form a straight passageway interiorly from end to end of said lengths of tubing and thereby prevent turbulence of fluids passing therethrough, said rst length of tubing having a nozzle and having a threaded boss 1ocated on its under side intermediate its ends, a hollow substantially cylindrical member threadedly engaging said boss and extending below said rst tubing length, a rotatable handle grip extending downwardly from said hollow member and forming a continuation thereof, a stem attached to said handle grip and extending upwardly through said member and having an upper end including an offset pin which projects into said first tubing length, a. rigid rod member extending lengthwise of said first length of tubing and having an aperture at one end engaging said pin and a valve member at its opposite end, said nozzle having a restricted passageway adapted to be at least partially closed, or fully closed by rotation of said handle grip, said second length of tubing having a hollow rigid handle element and a pivoted trigger handle extending downwardly therefrom and being in the same plane as said rotatable hand grip on said rst tubing, and a valve on said second tubing length and operatively connected to said pivoted trigger handle to control the passage of fluid from within said handle element to said tubing lengths.

2. A spray gun comprising a barrel, said barrel including a rst and a second length of tubing, said tubing lengths being straight from end to end, means on adjacent ends of said tubing lengths for attaching them together in axial alignment whereby to form a straight passageway interiorly from end to end of said lengths of tubing and thereby prevent turbulence of fluids passing therethrough, said rst length of tubing having a nozzle and having a threaded boss located on its under side intermediate its ends but positioned adjacent to said means for attaching said tube lengths together, a hollow substantially cylindrical member threadedly engaging said boss and extending below said first tubing length, a rotatable handle grip of substantially cylindrical shape extending downwardly from said hollow member and forming a continuation thereof, a stem attached to said handle grip and extending upwardly through said member and having an upper end including an oifset pin which projects into said first tubing length, a rigid rod member extending lengthwise of said first length of tubing and having an aperture at one end engaging said pin and a valve member at its opposite end,

said nozzle having a restricted passageway adapted to be at least partially closed, or fully closed by rotation of said handle grip, said second length of tubing having a hollow rigid handle element and a pivoted trigger handle extending downwardly therefrom and being in the same plane as said rotatable hand gripl on said first tubing, and a valve on said second tubing length and operatively connected to said pivoted trigger handle to control the passage of uid from within said handle element to said tubing lengths.

3. A spray gun comprising a barrel, said barrel including a first and a second length of tubing, said tubing lengths being straight from end to end, means on adjacent ends of said tubing lengths for attaching them together in axial alignment whereby t0 form a straight passageway interiorly from end to end of said lengths of tubing and thereby prevent turbulence of fluids passing therethrough, said first length of tubing having a nozzle and having a threaded boss located on its under side intermediate its ends, a hollow substantially cylindrical member threadedly engaging said boss and extending below said first tubing length, a rotatable handle grip extending downwardly from said hollow member and forming a continuation thereof, a stem attached to said handle grip and extending upwardly through said member and having an upper end including an oset pin which projects into said first tubing length, a rigid rod member extending lengthwise of said first length of tubing and having an aperature at one end engaging said pin and a. valve member at its opposite end, said nozzle having aA restricted passageway adapted to be at least partially closed, or fully closed by rotation of said handle grip, said second length of tubing having a hollow rigid handle element and a valve operator mounted adjacent said rigid handle element, said rigid handle element and said rotatable hand grip being in substantially the same plane, and a valve on said second tubing length and operatively connected to said trigger handle to control the passage of fluid from within said handle element to said tubing lengths.

WARREN M. SPRENG.

REFERENCES CITED The following references are of record in the rile of this patent:

UNITED STATES PATENTS Number Name Date 188,909 Howard Mar. 2.7, 1877 259,667 Churchman June 20, 1882 294,675 Richter Mar. 4, 1884 963,969 Williams July 12, 1910 1,102,352 Peabody et a1 July 7, 1914 1,180,907 Coen Apr. 25, 1916 1,743,370 Messmer Jan. 14, 1930 2,076,753 Thompson Apr. 13, 1937 2,225,759 Strout Dec. 24, 1940 2,238,521 Gustafson Apr. 15, 1941 2,362,946 Stockdale Nov. 14, 1944 2,416,719 Stockdale Mar. 4, 1947

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