US1910014A - Spraying device - Google Patents

Description

May 23, 1933. w. HERMANN I SPRAYING DEVICE fria/za,

@M ya afi 0%?" Filed Dec. 14, 1928 QAN Patented May 23, 1933 n UNETED STATES PATENT oFFicE i n i WOLFGANG HERMANNQOF CHICAGO, ILLINOIS, .ASSIGNOR TO METAL SPECIALTIES MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS SPRAYING DEVICE Appiieatie sied December 14,A 192s. serieu No. 326,136.

AThis invention relates particularly to a spraying device adapted for the-purpose of spraying paints, lacquers, or other liquids. llhe primary object is toprovide an improved device for controlling the passa-ge of compressed air admitted to the nozzle. A further object is to provide for the admission of air to the liquid container and its Vrelease therefrom in a simplified manner.

The invention is illustrated in a preferred embodiment in the accompanying drawing, in which- Figure 1 is a vertical sectional view of a spraying device embodying the invention, showing in open position the valve which controls the escape of air-from the liquid container at the end of the spraying operation; Fig. 2 is a broken section showing the valve in the position it occupies during the spraying operation; Fig. 3 is an enlarged broken section taken as indicated at line 3 of Fig. 1; and Fig. e is a perspective view showing the ball valve employed and the plunger associatedtherewith. l

The :invention is shown embodied in aV device wliich comprises a handle, and-a nozzle carried by said handle, and a liquid container carried by said nozzle. In the illustration given, compressed air is supplied from a hose through the handle of the spraying device which is equipped with an improved valve device which normally is in position to permit escape from the handle and from the liquid container.

In the construction illustrated, A designates a handle; B, a nozzle mounted on the handle; and C, a liquid container depending from and carried by the' nozzle.

The handleA preferably is of castmetal, such as aluminum. It comprises a handle grip 1 and a barrel 2 formed integrally with the handle grip and projecting angularly from the upper portion thereof. The handle grip is provided with an air" chamber 3 which i communicates at its upper portion with an air duct 4 which, in turn, communicates with a bore 5 which extends through the elbow portion of the handle. The bore 5 isi tted at its rear end with a screw-plug 6, and the bore has a reduced intermediate portion 5a vand a larger front end portion' 5b. The junction of the portions 5a and 5b is a valve seat 7. vAt its front end, the portion 5b ofthe bore is vfitted with a nut 8 which is provided with a guide-perforation.

The valve device shown comprises a ball 9 located inthe chamber 5b; a-spring actuated plunger 10, ofsquare cross-section, which worlrslinl the passage 5EL as a guide and which has a-rearwardly extending reduced stem 10 working in a bore 6a in the plug or cap 6. A spring i12-tends to force the plunger 10 forwardly and unseat the ball valve 9. The valve device' further comprises a linger actuated plunger 13 which works freely through the perforation in the nut 8. The chamber 5b is provided in front of the valve seat 7 with an out-let port7 or ports, 14, leading vto the external atmosphere. c i.

The barrel 2 of the handle is provided with an air passage 15 and at the front end thereofa tappedbore which receives the threaded shank 16 ofthe nozzle.

The air passage 15 communicates at its rear end with a forwardly and downwardly inclined duct 17 which intersects the bore 5a at an acute angle. rlhe duct 17 is shown closed at its outer end by a screw 18. Should it be desired, thescrew 18 may be replaced by a needle-valve adapted toregulate the quantity of air passing to the nozzle. The duct 17 is oset with relation to the .duct 41. That is, the duct 17 is located some distance in front ofthe duct 4 and points in a directionto direct air escaping from the liquid container C towards the chamber` 5b, from whence it may escape to the atmosphere.

Normally the springl pressed yplunger 10 holds. the valve 9 unseated. When the device is in use, the operator, through the medium ofthe iingerjpiece 13, holds-the valve against the seat 7, so that compressed air will pass from the handle throughthe duct 4 into the chamber 5 and past the plunger 10 to theduct 17, and thence to the duct 15, and then to the nozzlewWhen the operator releases -the finger-piece 18, the Vvalve isimmediately unseateoh andv air can then pass from the container to the external atmosphere and also from the chamber?) to the external atmosphere. rIhe purpose is to prevent the spattering of varnish, or paint, at the end of the operation.

The chamber 3 is shown provided with a packing of cotton, or the like, 19, adapted to prevent the passage of water or oil, while permitting the passage of air. The wadding is shown provided with a string 19:L by means of which it may be withdrawn from the chamber 3. Oil, or oil and water, may collect in thelower end of the chamberB. Accordingly, the lower end of the chambers are fitted with a plug 20 having therethrough a passage 2()a guarded by a valve 2l.which hasv extending therethrough a duct 21a.V Vhen desired, Vthe valve 21- may be partially unscrewed to unseat the valve and permit escape of any liquid which may accumulate in the lower portion of chamber 8. The handle is provided near its lower end with a nipple 22 which connects with an air hose 22, Through it compressed air is admitted to the handle. Y

The nozzle B may be of any suitable construction. It is shown as comprising three main sections 23, 24 and25. Also, it is .shown as equipped with a nozzle-tip 26 vof suitable construction.

The container C is equipped with a cap 27 which depends from a stem 27a carried by a ring 27h. Said ring is fitted on a reduced portion 24n of the nozzle-section 24, and is clamped between the sections 23 and 24. The bearing 24n Vis provided with an angular air passage 28 whose outer wall is formed by the rir 1g 27 b. Y

'lhe nozzle section 23 is provided with Ya central air passage 29which communicates through an inclinedV duct 30 in the nozzle-section 24 with the angular passage 28. F rom the angular passage 28, forwardly converging air ducts 3l extend to the tip of the nozzle.

The angular air passage 28 also communi- Cates through a passage 32 with the interior of the container C. A liquid tube 33 extends freely through the air passage 82and has its upper end connected with the nozzle-section 24 and communicating with a liquid passage 33, which, in turn, communicates with a central liquid passage 33h leading to the tip of the nozzle.

The construction of the nozzle itself is not claimed in the present application. The nozzle is more fully described in my application, Serial No. 326,135 filed even date herewith.

The container cap'27 is shown provided with a large threaded socket 34 into which is screwed the upper end of the container C. The cap is also shown provided with a smaller threaded socket 36 which is adapted to receive a container of smaller size, which may be substituted for the large container.

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

Y l. In a spraying device, a handle provided with a. bore and having an angular upper end, a valve chamber extending through the elbow portion of the handle and provided near its front end with a valve seat and in front of said seat with an outlet port, the upper portion of the handle being provided with nozzle-attaching means, and with ducts extending from the nozzle to the valve chamber and from the upper portion of said bore to the valve chamber, a valve associated with said seat, a spring-pressed plunger at the rear ofsaid valve and normally holding it un-r seated, and a l forwardly presented fingerpiece adapted to hold said valve in seated position. c

2. In a spraying device, a handle provided witha bore and having an angular upper end provided in its Velbow portion with a valve chamber having a forwardly presented valve seat and in front of said seat an outlet port, a nozzle-attaching means and an air duct eX- tending therefrom and having a Vportion communicating withthe valve chamber back of said seat, aport connecting the upper portion of said bore with the valve chamber, and a valve .device in said valve chamber comprislng a rear plug, a spring-pressed plunger in front of said plug, a ball valve in front of said plunger and in advance of said seat, a front plugl provided with a perforation, and a linger-actuatedv plunger working through said front plug `and adapted to hold the ball against said seat, said valve chamber having an outletport in front of said seat.

Ina spraying device, a nozzle provided withan air passage, a container-cap provid- .ed with an air passage communicating with said first-mentioned passage, a liquid tube eX- tending freely through said second-mentioned air passage and communicating with a liquid passage with which the nozzle is provided; anda handle equipped with a valve chamber and with a valve seat and with an outlet port,` said handle having anair passage connecting the air passage of the nozzle with said -valve chamber back of said seatand having an air passage through which compressed air is admitted to the valve chamber., and a spring-opened, linger-closed valve associated with said valve seat.

4. 'In a device of the character set forth, a liquid container equipped with a cap having a ring from which the cap depends-and having an air passage extending through the cap to the interior of said ring; a nozzle comprising sections between which said ring is clamped, one of saidsections having an annular air passage whose outer wall is Aformed by said ring, said nozzle having a liquid passage extending forwardly to the tip; a liquid tube connected with said nozzle and communicating With said liquid passage, said tube extending freely through the air passage of the container-cap; and means for supplying Compressed air to the nozzle, said means being provided With mea-ns for discharging of air from the container through the rear portion of said nozzle at the end of the operation of the device.

WOLFGANG HERMANN.

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