US1822622A - Spraying device for spraying paints, varnishes, etc. - Google Patents

Description

Sept. 8,I 1931. w. HERMANN 1,822522 SPRAYING DEVICE FOR SPRAYING PAINTS, VARNISHES, ETC

Filed April 28 192e 2 sheets-sheet 1 gil J6 19 ggf l I I Il ff Il 12 d j Ql 'I [Il I Sept- 8, 1931- w. HERMANN 1,822,622

SPRAYING DEVICE FOR SPRAYING PAINTS, VARNISHES, ETC

2 Sheets-Sheet. 2

Filed April 28, 1928 1 WOLFGANG HERMANN, OF CHICAGO, .-ILIQINOIS, ASSIGNOR -TO'f-METAL S13EGIAL'JIIESy Patented Sept. 8, 1931 .-MANUFACTURING OF CHICAGO, ILLINOIS, A-A ,CORPORATION OF :ILLINOIS Application nled A pril,

"lThis invention Vrelates :particularly i'to a spraying device adapted to besuppliedfwith compressed air through a flexible hose 'leading from la suitable sOurce-ofsupply 'The primary object isfto provide vafsl'mple and cheap device which isfadaptedf to thepurpose ofl spraying paints, lacquers, etc. and whichr is equipped with lmeansy for-sep arating water and oil from'the air.

16 ""Theinvention is illustrated in la preferred embodiment-in thel accompanying drawings, in which- `Fig; 1 isi-a plan view of thefimprovedvspraying device; Fig. 2, a vertical sectional view taken as indicated at line'2v ofF ig. 1;-Fig. '3, avertical sectional View taken as indicated ati linev 3l of Fig. yil ;Fig.` 4, a -brokenfplan-sectional view taken-asindicated -at-liner4 of Fig. 3 ;'F ig. '5, a sectional view taken as indicated at line 5 of Fig. 2;1Fig. f6, a broken detail view of the valve shown in'Fig.*5;Fig. 7,r albroken sectional viewftakenkasindicated at line 7 of Fig. 2; and Fig. 8, a' broken sectional view, sho-wing a modification.

In the preferred embodimentillustrated, the device comprises a hollow handleA'having its upper end equipped with'an integral head A a-nozzle B- detachably connected with thehead A; and a can,.or receptacle, C depending 'from the nozzle and spaced La short distance in front of the handle.

Thehandle is of generaltubularform; but shaped to conform properlyto-thehand,1a grip-portion'l beingl provided. Atfthe .lower end the handle is provided with pa tapped opening 2 into which is-screwed .-a plug 1:3, ythe threaded portion of the plug beingprovided with a peripheral channel 3a, which interruptsv the threads. At its inner end the plug is equipped with a tube .-4 whose upper en'd'is openand whose lower end communicates with a passage 4a which opens into the annular passage Sa. :At the rearside of the lower portion ofthe handleis a 'tubular bossi' 15 which is tapped tofreceivefthe threaded'end of-a nipple 6 with which is connected1 the-air" hose-7 Air can thus passthrough'the hose intovthe annular kpassage 3a, and: thence 'throughf the tube 4 intothe handle. Y

V`At .the frontA side ofthe' base-portion of the 1928. Serial ;No. 273324.

handle 'is 4a hollow lboss vI8 lprovided with fa valve-seat 8a. "Aneedle-valvefQfengages said valveseat. lThe shank 9&gof the needle-valve has threaded vconnection with the boss V8,-and aid shankfis equippedwith aknurledfhead 'The handlet is also provided at -itslbase-pertion :with afootfor support, l0, which, inconnection with the can C, serves to supportjthe device on atable, when desired. v

Within the chamber llvofthehandle is conlined a loose packing 12;Which may-be of cotton batting, or .-sponge, or f the 3 like. v','Ihis should be looseenoughfto permit airA to pass upwardly and of proper charaoterto-absorb any moisture whichfmay be carriedthereinto bythe air. Thefmoisture andfany oil -f and impurities which maybe carried-with it drain back "into the lbottom of the handle. "The packing, or l. loose wadding` plug, 12 bears Aat its upper end against a disk v12a which is shown provided withf lugs '121a'dapted to prevent the wadding from being fforced Lagainst the-upper-end of the chamber -11-1. lA small cord 13 is connected with' the'dislealidr extends downwardly throughthe'. central portion of the. packing. The lower-endofI theecorvdis shown forming the coil1`3 'The cordff-is of suffcient length to-enable the -end toprotrude throughthelower-end of the handle when-'the plug 3 is removed. rThe packing can' then-be withdrawn: from: the handle andcleaned, ora fresh packing-,may beinserted. V

The valve i9. which guardstheejectioniport is, as shownf inF ig.` 7 ,provided withapassage `9c which extendsfllongitudinally through thefvalvefstem land openslaterally intofthe annular space I4 Aabove or outside'fthe valveseat 8a. When the valve vis partially unscrewe'd, the air pressure w'illf`V force -ffrom-the lower portionf'off the handle any' liquid which may collect therein in the space--aroundthe airltube. 4. yfIn' practice,=the liquid will not be .allowed toaccumulatefto-such -a height that it\w`illfbe inecessaryfor the air to pass throughftheliquid.

"-The head Af of the handle terminates' inan integral interiorly threaded l #socket 15 into which isscrewedthe threaded shank lofthe nozzle 2B. '-The nozzle''l'is,providedI with a central passage 17 which communicates with a passage 18 leading through the head A and intercepting a passage 19 which is provided with a valve-seat 19a. A needle-valve 20 (reducing valve) at the junction of the handle A and the head A coacts with the valve-seat 19 to regulate precisely the passage of the air to the nozzle.

The lower end of the passage 19 communicates with a passage 21 which is equipped with a valve-seat 21. A needle-valve 22 is adapted to seat against the valve-seat 21. Back of the needle-valve is a coil-spring 23 whose outer end is received in a socket with which a removable plug 24 is provided. The plug serves "to close a valve-chamber 24 in which the spring 23 is located, air being admitted from the upper portion of the chamber 11 to the chamber 24: through a passage 24h. The valve 22 is equipped with a forwardl)7 and downwardly inclined stem 22 which extends through a guide-passage 25 and which has its forward end equipped with a finger-piece 22h.

The nozzle B is provided with an inner tubular extension 26 which has a bearing-portion 26, a threaded portion 261, an annular passage 26c between the parts 26 and 26, and a reduced extension 26d. The member 26 is provided exteriorly with a longitudinal liquid-passage 26e which leads from the annular passage 26c to the front end of the member 26. The nozzle is also equipped with an outer tubular tip-portion 27 which is interiorly threaded at its rear end and screwed onto the part 261.

The can C is suspended by means of a cap 28 which is equipped with a ring-portion 28 which is confined between the nozzle-tip 27 and the shank-portion of the nozzle B.

A liquid-tube 29 has its upper end screwed into a tapped countersink at the lower end of the liquid-passage 30 which extends through the cap 28 and communicates with an enlarged passage 31 which, in turn, communicates with the annular passage 26C. At the junction between the passage 30 and the passage 31 is a valve-seat 32. The passage 31 is extended and internallythreaded, as indicated at 31. A needle-valve 33 is adapted to regulate nicely the passage of air past the valve-seat 32. The needle-valve has a threaded shank screwed into the tapped opening 31, and has a knurled head 33.

In the use of the improved device, the valve 2O is opened suciently to admit the desired pressure through the passage 18 to the nozzle; and the valve 33 is opened sufficiently to admit the desired amount of liquid. The blow-ofi valve 9 normally is closed. Air pressure is introduced into the hollow handle through the hose 7, the air passing into the annular passage 3 of the plug 3. and thence through the passage 4 and tube 4.

The operator presses the finger-piece, or

trigger, 22", thus unseating the spring` pressed valve 22 and admitting pressure to the nozzle. It will be noted in Fig. 1 that the reduced portion 26 of the nozzle has extending therethrough a central passage 34 which communicates with the passage 17. Thus, the air passes centrally through the nozzle and escapes through a passage 35 with which the nozzle-tip 27 is provided. Passing of the air creates a suction through the passage 26, so that liquid is drawn up through the tube 29 into the annular passage 26c and passes thence to the tip of the nozzle, where it is atomized.

Any liquid, such as water and small amounts of oil is trapped in the hollow handle andl collects in the lower end thereof around the tube 4;. It is noted, however', that the air canpass through the tube 4 without agitating the liquid collected in the lower end of the handle. hen desired, the blow-off valve 9 may be lunscrewed sufiicicntly to permit the liquid to be blown out therethrough.

The plug 3 is shown provided at its outer end with a head 3b having a conical surface 3 which (its closely within a conical seat. The plug is provided with a slot 3d, enabling a screw-driver to be applied to remove the plug when necessary. Removal of the plug permits the loose-packing plug 12 to be withdrawn by means of-the cord 13. Thus, the packing can be cleansed and reinserted; or a fresh packing can be introduced.

The present invention renders unnecessary the use of a separate trap or oil and water separator at another point in the line. Thus,an extremely simple and cheap spraying device is provided which can be used in connection with any pressure supply source which thus does not need to be equipped with an oil vand water separator. This enables the improved device to be used in many places, such as garages, supply stations, etc., equipped with air-pressure tanks and compressors, but not equipped with liquid-separators.

The head A of the handle is of angular form, as shown. The handle and its head preferably are cast integrally; and the head preferably is equipped with a ring 36 by means of which the spraying device can be hung upon a hook.

In the modification shown in Fig. 8, the air-hose 7 is attached some distance above the lower end of the handle 1; and the lower end of the handle is closed by a removable plug 37 (which takes the place of the plug 3) and is provided with an axial bore, or passage, 37 which has a valve-seat 37". A valve 38 normally closes the passage, the stem of said valve having screw connection with'the plug. The valve has a passage 38 through which trapped liquids and sediment may be blown when the valve is unscrewed slightly.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

What I regard as new, and desire to secure by Letters Patent, is:

1. In a spraying device, a handle having a bore and an angular head equipped with nozzle-attaching means and provided with a passage leading therefrom to the upper portion of said bore, said passage being equipped with a valve-seat, a spring-pressed fingerretracted valve normally engaging said seat, a removable plug connected with the lower end of said bore and equipped with an air passage, a hose connected with the base-por-` tion of said handle and communicating with said air passage, a packing in said bore removable through the lower end thereof1 when the plug is removed, and a blow-off valve connected with the base-portion of said handle above said plug, sai-d packing being spaced above the air passage in said re1nov able plug and above said blow-off valve.

2. In a spraying device, a handle provided with a chamber and above said chamber with nozzle-attaching means and with a passage leading from the upper portion of said chamber through the nozzle-attaching means; a

removable plug connected with the lower` end of said chamber and equipped with a drain-valve; an air hose connected with the base-portion of said handle and communieating with said chamber; and a packing in the upper portion of said chamber removable through the lower end thereof when said plug is removed.

3. A device as specied in claim 2, in which the upper portion of the handle is equipped with a spring-closed inger-retracted valve controlling said passage.

4. A device as specified in claim 2, in which the air hose communicates with said chamber at a distance above said removable plug.

WOLFGANG HERMANN.

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