US1434569A - Paint sprayer - Google Patents

Description

n.1. SULLIVAN. A

Y PAINT SPRAYER. AfVPLICATION FILYED SEPT.2I. 1921.

l yg. Patented Nov. v79 1922.

y laatse nemen I. snuiven, or Kansas cI'rY, IfrIssoUIai.

PAINT SPRAYER.

Application filed September 2l, 1921, Serial No. 502,299,

"0 all Lo/tom 'it /ff/,f/ concern y "Ee it known that i, l mi, SULLIVAN, n oi the United etes, residing at `City, in the county o'l Jackson and l" issouri, have invented a new and Yul p, int Sprayer, of which'the followa specification. ,f invention relates to paint sprayers and parti :ilarly al device of this character which employs comL iessed air to reduce llrpiid paint to a suitalffle spray for spraying upon the surfaces of wood and metal strucobiect oi' the invention is 'to provide ble syiraying` d vice whichr may be I with a supply olE liquid paint holler i.ir pressure and also connected with a, sup ly ori compressed air and having selr" detained "facilities i'or refgjulating the pres .sure of the liquid paint d regulating the air i'ressure vfor redurii trie liquid paint to :x spray.

Another object of the invention is to proe an inexpensive hand device oi" this charer w nich may. be manipulated by the operator at points remote fromr the rpaint supply. r

Another object ol' the invention is topi-ovide a device of this character which is ar ranged to be self cleaningand having acility to prevent .stoppage olf the flow of liquid paint.

.l attain these objects by means 0Ie the mechanism and combination of parts illustrated in the accompanying drawing in whichll`igurc l, is a side elevation of a paint sprayer embodying my invention; ligure 2, is a longitudinal section. of the same., sectioning of the air valve and conduits being omitted; Figure 3, is an end view of the same, and Figure il, lis an end view of the sprayer tube.

limilar numerals ol reference refer to corresponding parts throughout the several views.

rllhe device comjjirises a hollow cylinder member l, having internal screw threads at its `lforward end and external screw threads at its rearward end. @n the upper side of the member l, is an integral boss 2, having a' vertical bore which communicates with the interior of the cylinder member, thus forming an inlet port 3, for the liquid paint, the upper end of the boss has internal screw threads for receiving the screw end of a pipe section 4l, the latter having internal screw threads for receiving the screw end of a valve member 5, which is also provided at its upper end withscrew threads for receiving` the screw end ol' a pipe 6,which has internal screw threads at its upper end for the screw plug on a hose 7, which connected between the pipe 6, and a supplyv of .liquid paint under pressure, not shown. rllhe valve member 5, is chambered and divided )y a diaphragm 8, having' an. oriiife 9, which is adapted "lor receiving a needle valve l0, which operates to open and close the orifice 8, a wheel ll., being` associated withthe needle valve stem to facilitate the manipulation ot the valve. The er;- terior of the member l is provided with an integral mass l2, havl horizontally eX- tendmp; boss i3,` which bored longitudi ually to provide in the side oi.' the member l, an inlet port lei, for the compressed air. The boss has internal screw threads for receiving the screw end oi anr elbow pipe l5, `which also has internal screw threads-for receiving the lower screw Aend of a valve member 16, and a pipe 17, 'is screwed on the upperl screw end of the valve member, the latter pipe is provided with internal screw threads Afor receiving the screw plug on a hose i8, which is connected between the pipe mentioned and a supply ot compressed air, not shown. The forward end of themember l, is provided with a larger bore to prova. an annular shoulder i9, to serve as a bearing; for a peripheral Harige 20, on the inner end oi a hollow cylindrical rotatable valve member 2l, which operates in the member l., to open and close the ports 3 and lll.. The valve member 21, isy arranged to project rearwardly outward of the member l., and the projecting end thereof forms a handle portion 22, and the handle portiony is scored to facilitate the manipulating the valve by hand. On the rearward end oiE -the member l, is screwed a stuiiing bonr 23, hav

the usual packing ring to prevent lealtag'e'. fr concentrically formed bearing block 1241, is loosely mounted in the member l, and has astein 25, which is projected into the end of tl valve member 21, thus bringing the block 24, to bear on the end of the valve member, the block has a bore at its horizontal airis` to provide communication between the member l, and the valve member 2l. In the forward end of the member l., is screwed plug 26, having a bore longitudinally thereof which communicates with the inteilo rior of the member 1, the plug is also provided with external screw threads for receiving a noz-ale member 2T, which is screwedl therein, Vthe end ofthe nozzle is provided with a suitable mouth 28, for spraying and spreading the liquidpaintvwhich is forced through the nozzle. ln the wall ot the valve member 2l', is a hole 29, which is adapted for registering with the inlet port diy oi the' hole 29, at an angle hole 30, which .is adapted the inlet port 11i, at the hole obtains registry with the inlet jportf* it the rotative movet ot the valve 21, 'the lower side of the ...i et the member 21, is provided with t nsverse slot 31, which is elongated to limit the rotative movements of the valve to opening and closing the ports 3 and 14:, whenever a stop 82, iicli is dcmountably secured in the wall oi. the memberv 1, is projccnd through the slot.y l

To operate the paint spraying device, the hole 7, is connected with the pipe 6, and with a tank, not shown, vcontaining liquid paint under air pressure, andthe hose 18, is connected with the pipe 17, and with a tanli, not shown, containing a supply ot compressed air. The hose mentioned may be oi any suitable length to permit the use of sprayer at any desired distance irom paint and air supply, thus tall buildings, l"flges, and other structures may be paintwith economy.

W7 hen properly connected, the sprayer is operated by manipulating the needle valve 10, to allow the liquid paint to present itself at the inlet port 3, and the air valve 16, is manipulated permit the compressed air to he present the inlet port lll., The valve 21, is then rotated gradually to bring the holes 29 and B0, therein to register respectively with the ports 3 and 11i, whereupon the liquid paint is forced into the valve member 21, and orcedtherefrom, through the reduced bore in the 'lor registry with block 24, through the plug 26, and through the nozzle 27, by the air pressure adimitted through the port 141, the paint sr-aying from theA mouth 28, of tie nozzle and spreading upon the material being painted. The spray may be reduced by rotating the valve `21, to partially open the ports 3 and 111,v and the quantity ot paint and pressure of air maybe regulated by manipulating the needle valve andthe air valve. ln TEigure 2, the holes 29 and 30, in the valve member 21, are shown fully registering respectively with ports 3 and 14,-. By removing the stop 32, from the slot 31,

removing the plug 26., the bloclr 24, and the nation with a supply of liquid paint under pressure and a supplyof compressed air, of a hollow cylinder member having an inlet port communicating with the supply of liquid paint under pressure and an inletport communicating with the supply ot compressed air, a hollow cylindrical valve member rotatably and demountably mounted in said hollow cylinder member and having in the wall thereof holes adapted tor registering with the inlet ports in said hollow cylinder niiember, and a nozzle member nounted in the end oi' said hollow cylinder member and having an elongated opening in its end and forming a spreader.

2. In a paint sprayer, the combination with a supply ol liquid paint under pressure and a supply of compressed air, of a hollow cylinder member having an inlet port communicating with the supply ot liquid paint under pressure and an inlet` port communieatingA with the supply of compressed air, a needle valve mountedl on said hollow cylinder member and operating to open and close the communication between the hollow cylinder member and the supply oiE liquid paint under pressure, a valve member mounted on said hollow cylinder member and operating to open and close the communication between the hollow cylinder member and the supply of compressed air, a hollow cylindrical valve member rotatably and demountably lmounted in said hollow cylinder member and operating herein to o pen and close communication between the valve member and the inlet ports in the hollow cylinder member, said valve member being arranged to project outwardly of the end of the hollow cylinder member to form ci the projecting portion ahandle tor manip the valve stop pin detachably mounted in the wall oi said hollow cylinder membe1 and piercing said hollow valve member and limiting the rotation thereof, and a nozzle member mounted in the end of said hollow cylindermember and having an elongated opening` forming a spreader.

lansas City, Missouri, September 15,.

lvllitnesses Dwrorrr AM. SMITH, GooDwrN CRnAsoN.

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