US2493677A - Tank and spray gun - Google Patents

Description

Jan. 3, 1950 Filed July 10, 1946 A. R. LOFSITRAND, JR 2,493,677

TANK AND SPRAY GUN 2 Sheets-Sheet 1 fia/kz'rand, w

Jan. 3 19 50 A. R. LOFSTRAND, JR 3,

TANK AND SPRAY GUN Filed July 10, 1946 2 Sheets-Sheet 2 Patented Jan. 3, 1950 UNITED STATES PATENT OF F AND SBRAY Anders .Rudol'f'Lofst-raud, Jr., Silver Spring, Md.

Amflicamn J 815 10, 194 6, Serial No. 682,625

'2 Claims. 1

This invention relates to -portable rsprayers.

.An object of this invention is to provide an improved sprayer including a portable tank, a pump for placing the material under pressure, and a spray-gun connected to the tank by a fiexiblehose.

Another object of this invention is to provide an improved insecticide tank which includes a strainer tor straining the material as .it vis poured into the tank, and :a pressure pump extending into the tank tor placing the material under the desired pressure.

A :further object of this invention is to provide in a sprayer an improved gun-type valve 400D- nected to the spray nozzle which will iacilitate directing the material to the desired location.

With the above and other objects in View, my invention consists in the arrangement, combination and details of construction disclosed in the drawings :and specification, and then more pan ticularly pointed out in the appended claims.

In the drawings, wherein meference characters designate -similar parts throughout the respective views,

Figure l is a detail top plan xo1 a sprayer assembly constructed according to an embodiment of this invention,

Figure 2 is adetail side elevation, pamtlysbmhen away and in verticalsection, of the sprazyeritank,

Figure 3 is a longitudinal section, partly broken away and in detail, of the spray or waive structure,

Figure .4 is .a fragmentary side elevation of the tank opposite from that shown iniEigune Referring (to the drawings, the numeral 2H designates generally a tank structure which is formed of .a icylindrical side wall :lal, va top mall .I 2 which is upwardly bowed and tormed with a marginal upturned flange 4 3 whichmay be'welded or otherwise firmly secured to the :side wall 13. Preterably the side Wall EH is formed with :an annular inwardly projecting head M which :forms a seat (or stop against which the top wall 113 :is adapted to bear. The side wall l I extends beyond the flange ,l 3 of the top wall and the extension .of the side wall I I is reinforced by a reinforcing band 15 which may be welded .or otherwise secured to the extended side wall.

A reinforcing lower band lb is also :seemed to the lower end of the side wall, which as shown in Figure 2, is formed with a lower annular inwardly projecting bead 1! against which the bottom wall is adapted to engage. The bottom Wall is similar tothe top wall.

The top wall l'2 has mounted thereon a 'cyl'indrical filler member l8 which may be welded or 2 otherwise rfirmly secured to an inwardly turned annular flange l9 lionmed in the top wall A2. The nipple is has threaded on the upper end thin-9 a cap 20 which is tormed with a pair of upwardly extending lugs 21!. ilhe cap 29 on the inneriside (thereof is formed with an inwardly projecting ,seat :22 against which a plate 23 is adapted to engage.

The plate 23 on its inner side has secumed thereto a gasket 24 is secured to ithe plate 23 by a zfastening member ,25. The plate 2.3 also Includes an outwardly extending .s'tud 2-5 which extends through the cap 20 andmaly be secured by means :of 1a cotter pin 52;! 01 other suitable hastentug means. The :cap :20 preferably chained to the nipple :lzB bymeans rof :an anchoring chain 2.8 which fixed :at one :end to the nipple z! 8 and at the rother send to a washer .29 interposed between the fastening member 25 and the gasket 22d. The innerendrofzthe nipple 23 has dependinglysecured thereto a strainer 30.

'The strainer ill] at its upper end is :formed with a flange 231 engaging in :the annular groove 32 formed in the nipple l8, and a split flocking ring 33 is adapted to :removably lock the strainer 30 on the nipple *l 8.

In order to provide a means whereby the insecticide within the tank flafl -may be placed under aiir pressure, I have provided an air pump generally designated as 84. The pump 34 includes a cylinder 35 which is disposed in depending relation within the tank H3. The upper end o'f the cylinder 35 is formed with an annular flange 36 whichengages against an annular flange 3-1 carried by a nipple 38. The nipple 38 is threaded into -a sleeve 39 which is fixedly secured through the top Weill I 2, and a closure plate on bears against the upper side of the flange 36 "of the cylinder 35, being secured thereto by means of fastening nrembers 4-1. lhe cylinder 35 has fixed to the inner end thereof an end wall or cap 42 which formed acentra-llydisposed boss E3. "The boss 43 has threaded thereintc a nipple M forming part of 'a check valve housing, and the nipple e2 has threaded on the inner end thereof a 'cap formed of a cylindrical member 45 and an end wall 46.

The cylindrical side wall 4-5 of the check valve cap generally designated as M is formed with one Or more openings '48, and the end wall 46 is also formed with a central opening #9. A checkvalve plug 56 'is adapted to normally engage against the inner or "lower end of the nipple 4 which constitutes a valve seat, and a plug 53! is cons'tantly urged to closed position #by means of a spring 51. A piston generally designated as 52 is slidably mounted Within the cylinder 35.

The piston 52 includes a cup-shaped washer 53 which is secured by means of a clamping ring or nut 54 to the lower end of a tubular piston rod 55; Preferably a couplin member 56 is threaded onto the lower end of a plug 51 which is fixed in any suitable manner in the lower end of the tubular piston rod 55. The plug 51 is formed with a bore 58 closed by means of a threaded plug 59. Air is admitted to the cylinder 35 above the piston 52 by means of an upper air opening'60 in the tubular rod 55, and a lower openin 6I also formed in the tubular rod. Upon upward pull of the rod 55 and the piston 52, air will slip past the gasket 53 and upon downward movement of the piston the gasket 53 will slidingly and sealingly engage the cylinder 55.

The piston rod 55 has fixed to the upper end thereof a stirrup shaped handle 62 formed with a boss 63 which is fixed about the upper end of the rod 55 by means of a pin 64. The handle 62 is formed with an opening 65 within which a spare spraynozzle 66 is locked'by means of a screw or locking bolt 61. The top wall of the tank has extending therefrom an outlet hose 68 which is connected to the top wall I2 by means of a coupling 69, and the hose 68 is connected to a piston type valve structure and spray nozzle handle as shown in Figure 3.

The handle and valve structure include a handle member formed with a bore H. A coupling 12 is threaded into the lower end of the handle 10 and is formed with a nipple 13 on which a coupling member 14 is threaded for securing the outer end of the hose 68 to the handle. A tubular strainer is carried by the coupling member 12 extending through the bore of this coupling member and into the bore H of the handle 10.

The handle 10 is also formed with a counterbore 16 communicating with a valve chamber 11 which is formed in an angularly disposed valve body or housing generally designated as 18. The body 18 is formed with a horizontally disposed chamber 19 communicating with the chamber 11 through a reduced diameter chamber 80. The reduced diameter chamber 80 forms a shoulder 8| against which a valve gasket 82 is adapted to engage. V

A spherical valve plug 83 is loosely disposed in the chamber 11 and is adapted to be normally urged to closed position by means of a spring 84 carried by a hollow plug 85 which is threaded into the body 18. The inner end of the spring 84 bears against a plate 86 having a concave inner surface forming'a ball seat for holding the plate 86 against lateral movement relative to the ball 83. The ball 83 is adapted to be moved to open position by means of an elongated rod 81 which is slidable in a bushing 88 threaded into the forward endof the bore or chamber 19; The rod 81 has areduced diameter outer portion 89 forming a shoulder 90 which is adapted to abut against the. inner end of the bushing 88 to limit 7 the outward movement of the valve operating rod.

An annular flange 9I is also formed on the rod 81 and is adapted to engage against the inner end of the chamber or bore 19 in the event the rod 81 is moved inwardly to the limit of the movement provided for this rod. The rod 81 is also formed with a valve plug engaging the stem 92 which is of smaller diameter than the counterbore 80 so that the fluid can pass about the stem 92 when the valve 83 is in its open posiextension 98.

tion. A cup-shaped knob 93 is fixed on the outer end of the rod 81 and is adapted to telescope over an extension 94 carried by the bushing 88.

The chamber or bore "I9 has communicating therewith an upwardly and rearwardly inclined duct 95 whichis formed in the body 18, and the duct 95 communicates at its upper or rear end with a horizontally disposed outlet chamber or duct 96. The body '18 is formed with an upwardly projecting lug 91 and with a cylindrical A button locking lug 99 is carried by a sleeve 600 which is rotatable on extension 98 and is adapted, when in released position, to be in alignment with lug 91.

When the locking lug 99 is in locked position, it is swung downwardly to the dotted line position's'hown in Figure 3.

. An elongated pipe IOI is connected to the extension 98 by means of a coupling I02, and a spray nozzle I03 is carried by the outer end of the pipe IIJI. The spray handle and the nozzle I03 are adapted to be releasably secured to the tank I9 by inserting the nozzle its into a socket I04 which is fixed to the side wall I I of the tank adjacent the lower end thereof. A U-shaped keeper I05, having outwardly directed flanges I06 is fixed to the upper end portion of the tank in alignment with the socket I05 so'that when the spray structure is not in use, the spray gun will be secured directly to the tank and the latter may be carried by means of the handle 82.

As shown in Figure 1, thehandle 62 may be locked in its innermost position by means of oppositely directed lugs I01 which are carried by the closure plate 48. The boss 83 has oppositely extending pins I08 which are adapted to engage the lugs or keepers I01. The top wall I2 of the tank is also provided with a pressure gauge I09 of conventional construction so that the user of this device will be able to determine the working air pressure within the tank.

The tank I0, adjacent the bottom thereof, has extending laterally therefrom a foot or pedal member IIO of looped construction having an upwardly directed inner end III engaging an open barrel H2 which is fixed to the lower end of the tank. In this manner the tank I9 may be steadied by placing a foot on the foot member H0 during the pumping of air into the tank. In order to provide for carrying of the tank on the shoulder during the use of the device, I have provided a flexible strap H3 which is formed at the opposite ends thereof with snap hooks I I4, II5 engageable with eyes H6, H1 respectively, which are loosely secured to the lower and upper portions of the tank I9.

In the use and operation of this tank, the tank I0 is filled with the desired insecticide by removing the cap 20 and discharging the insecticide through the strainer or filler 39. Preferably the tank is not filled to the top so that a substantial amount of air may be pumped into the tank by operation of the pump 34. When the desired amount of pressure is in the tank It], the spray handle 18 may be held in one hand and the pipe IOI directed to the desiredpoint. Inward pressure on the button or knob 93 will move the ball valve 83 to open position so that the insecticide may flow through the bore ll of the handle 19 and pass the valve 83 into the chamber 19. From the chamber 19, the insecticide will flow through duct 95 into the outlet duct 96 and then pass the spray nozzle I83. If it is desired to lock the knob 93 in valve opening position, the locking lug 99 is swung downward to the dotted line position shown in Figure 3.

I do not mean to confine myself to the exact details of construction herein disclosed, but claim all variations falling within the purview of the appended claims.

Having thus described my invention, what I desire to claim is:

1. In a sprayer tank, an air pump projecting partly into said tank, said pump comprising a cylinder formed with an upper flange, an internally threaded sleeve fixed in the top wall of said tank, a nipple threaded into said sleeve, a flange carried by the upper end of said nipple, said cylinder flange seating on said nipple flange, a closure plate engaging on said cylinder flange, means securing said closure plate, and said cylinder and nipple flanges together for dependingly mounting said cylinder in said tank, an inner end wall carried by said cylinder, an inwardly opening spring-pressed check valve carried by said inner end wall, a piston slidable in said cylinder, a tubular piston rod fixed to said piston slidable through said closure and having an upper intake opening, and a lower outlet opening, and a handle fixed on the upper end of said rod.

2. In a sprayer tank, an air pump projecting partly into said tank, said pump comprising a cylinder formed with an upper flange, an internally threaded sleeve fixed in the top wall of said tank, a nipple threaded into said sleeve, a flange carried by the upper end of said nipple,

said cylinder flange seating on said nipple flange, a closure plate engaging on said cylinder flange, means securing said closure plate, and said cylinder and nipple flanges together for dependingly mounting said cylinder in said tank, an inner end wall carried by said cylinder, an inwardly opening spring-pressed check valve carried by said inner end wall, a piston slidable in said cylinder, a tubular piston rod fixed to said piston slidable through said closure plate and having an upper intake opening, and a lower outlet opening, a handle fixed on the upper end of said rod, a pair of oppositely facing keepers carried by said closure plate, and a pair of locking lugs fixed to said handle and engageable with said keepers upon partial rotation of said handle to thereby lock said handle relative to said tank.

ANDERS RUDOLF LOFSTRAND, JR.

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

UNITED STATES PATENTS Number Name Date 604,049 Nicholsburg May 31, 1898 1,060,913 Lawrence May 6, 1913 1,189,932 Garber July 4, 1916 1,220,243 Leitch Mar. 27, 1917 1,918,930 Phister July 18,1933 2,359,534 Slatnick Oct. 3, 1944

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