US1900668A - Liquid gun - Google Patents

Description

March 7, 1933. V H A RQSELUND 1,900,668

v LIQUID GUN Filed March 19, 1932 Emma TM Patented Mar. 7, 1933 nNrrEo STATES PAT-ENT- OFFICE HAROLD A. ROSELUND, O13 TOLEDO, OHIO, ASSIGNOB TO THE DE VILZBISS COMPANY,

OF TOLEDO, OHIO, A CORPORATION OF OHIO LIQUID GUN 7 Application filed March 19, 1232. Serial No.-599,898.

This invention relates to liquid-ejecting means, and particularly to those oft-he guntype, and has for its object the provision of a simple, eflicient and improved devlce of this character, which is particularly adapted for and provides a convenient and'economical' means of applying penetrating or other lubricating liquids in a fine stream and w1th considerable force to springs, shackles, body conl nections, seams, and other points of automo-' biles requiring lubrication. v r

The invention is fully described in the following specification, and an improved embodiment thereof is illustrated 1n the accom- 1 panying drawing, in which Figure 1 is a side elevation of a device embodying the invention, with parts broken away. Fig. 2 is an enlarged longitudinal sec- .tional detail of the nozzle portion of the device,-and Fig. 3 is an enlarged section on the line 3 3 in Fig. 1.

Referring to the drawing, 1 designates a receptacle for containing the liquid to be ap plied, the top of which receptacle is provided with an open neck 2 to which the lower end of a head member or handle 53 is threaded, or otherwise suitably attached, to permit easy separation thereof. The member 3 is vertically elongated and fashioned to adapt it to form a handle to be grasped by the hand of the operator, and is hollow to provide a space 4 therein from its lower end to near its top.

A bore 5 is provided in the upper end of .the head 3 in angular relation to its vertical or longitudinal axis, and projecting from the outer end of this bore is a discharge tube 6 which terminates at its outer end in a nozzle 7 having a fine discharge orifice 8 therein,

preferably spaced from the outerend of the nozzle by a cavity 9.

A liquid supply tube 10 extends from the inner end of the bore 5 down through the space 1 and into the receptacle 1 where it con- V nects with a pump body 11 and communicates with the bottom. portion of the cylinder12 thereof through a passage 13. The cylinder 12 has an inlet passage 14 in its bottom in communication with the interior of the receptacle 1, and this passage is normally closed by an inwardly opening check-valve 15, while the passage 13 is normally closed by an outwardly opening check-valve 16.

' The tube 10 is held centered in the lower end portion of the head space 4 by a disc 17 which is held seated against a shoulder in the head member 3 by a gasket;18, which in turn seats on the upper end of the receptacle neck 2 when the head member is mounted thereon. The'lower end of thetube 10 ear ries the pump body 11 so that the latter is removed with the tube 10 from the receptacle when the head member is disconnected therefrom. V The disc 17, in addition to centering the liquid tube 10, also serves to prevent oil from entering the hollow head 3 in case the gun is upset.

A plunger 19 is mounted in the pump cylinder 12 and has an operating stem 20 extending upward therefrom through the disc 17 and to near the upper end of the head space 45 where it is engaged by an operating lever 21? This lever, in the present instance, is of U or forked-form, being fulcrumed, in thepresent instance, near its closed end on a pin 22in the upper end of the space 4, and has its legs straddling the upper end portion of the tube 10 and also the upper end of the rod 20, and provided in their free end portions with downwardly opening notches 23, which receive respective ends of a cross pin 24 on the rod 2O. The closed end of the lever 21 projects into'a side opening 25 in the head 3, and i is engaged therein by an' operating trigger 26, which extends downwardly from said opening without the head 3 in position to be grasped and operated by the first, or first and second, fingers of a hand grasping the head; The trigger 26 is fulorumed on apin 27 and has a r-earwardly extending finger 28 near itsfulcrum, which engages under the closed end of the lever 21, whereby an inward movement of the trigger 26 will actuate the lever 21 to impart a downward movement to the rod 20 and its plunger, thus forcing liquid from the pump cylinder outward to and from the nozzle 7 through the communicating passages. The rod 2 is normally held in raised position by the action of a compression spring 29 thereon, thus normally retaining the'operating parts in the positions shown in Fig. 1.

The outward movement of the trigger 26 relative to the head is limited by its shouldered coaction with the head, as at 30.

This manner of connecting the trigger to the plunger rod provides a simple and efficient means for communicating a rapid and forceful liquid-discharging movement to the plunger from a slight movement of the trigger, and also provides a compact assembly of parts. The relative lengths of the arms of the lever 21, as shown, enables a slight movement of the trigger to impart a considerably greater movement to the plunger. While this feature appears simple, it is quite important in practice, as it enables an operator to secure a considerable movement of the plunger by only slight movement of his fingers, thus making it possible for him to reciprocate the trigger to maintain a power- ;ful dischargingpressure of the liquid without the tiring action that would otherwise occur.

The discharge nozzle embodies a cleaning feature which enables the nozzle orifice to be easily and quickly cleaned, should it become clogged by the presence of small particles of dirt, or other matter in the liquid being sprayed. This clogging is bound to frequently occur in devices of this class, due to the small needle-like size of the discharge In the present instance, the nozzle 7 is reciprocally mounted in the outer end of a nipple, or coupling member, 31, which is threaded at its innerend on the tube 6, and the outqward movement of the nozzle relative to the nipple is limited by the engagement of a collar or enlargement 32 on the inner end of the former, with a coactingshoulder or stop portion 33 in the latter. A coiled contractile gspring-34: is disposed within the nippleand acts on the inner end of the nozzle to normally retain it in projected relationto the nipple. A-stationary cleaner stem-35 is provided coaxially in the nipple 31, with its outer end projecting into abore 36 in the inner end of the =nozzle,-and provided with a needle projection 37 of substantially the cross-sectional size-and shape as the discharge orifice 8,and-in position to enter such'orifice 5O gand clean the same of accumulated matter when the nozzle is forced inwardly relative to the nipple 31 against the tension of the spring 34:. It is apparent thatsuch cleaning of the discharge orifice may beeasily and 55.:zquickl eflected without stopping the operation 0 "the .gun by merely pressing inward on the nozzle. The stem 35 is carried by-a spider 38, the annulus of which, in the present instance, is mounted in the inner end of the ynipp'leand held firmly against a shoulder therein by its coaction with the inner end of the tube 6 when the nipple is screwed home thereon. The pressure of the oil inthe discharge tube cooperates with the spring 34:

(isg toreturn the nozzle 9 to its forward position.

1. In a device of theclass described, a receptacle, a hollow handle member mounted on the top of the receptacle, a tube depending from the interior of the handle down into the receptacle, a pump body carried thereby and having a cylinder in inwardly opening valvecont-rolled communication with the interior of the receptacleandin outwardly opening valve controlled communication vwit-h said tube, adischarge tube carried by the handle and in communication with said first tube, a plunger operating in said cylinder, a rod extendingfrom the plunger up into the hollow of said handle, an operating lever for the rod mounted in the handle, a control trigger carried by the upper end portion of the handle in operating connection with said lever, whereby an inward movement of the trigger will impart a downward movement of the plunger, and means normally retaining the plunger in raised position.

2. In a device ofthe class described, areceptacle having an open neck, a hollow head member of vertically elongated form detachably mounted onsaid neck and forming .a handle, means forming a pump cylinder and suspended from the head member into the receptacle, said means having inwardly opening valve-controlled communication with the receptacle, means forming an outwardly opening valve-controlled discharge passage from said cylinder up through a portion of said member and from the outer end-thereof, a. plunger .in the cylinder, a stem projecting from said plunger upwardly into the head member to near the upper end thereof, a spring acting .on said rod to normally retain it in raised position, a trigger f-ulcrumed .to the upper .end .portion of the head member and extending downward therefrom at the outer side thereof, a lever fulcrumed within the upper end portion of the head member and connecting said triggerand rod, whereby an inward movement-ofthe trigger will impart a downward movementito the rod.

3. In a device of the class described, a 11'6- ceptacle, a hollow head member-detach-ably mounted thereon in vertically extended relation tothe receptacle toform a hand-grip, a discharge nozzle carried by the outer end of the head, means formin a pump cylinder within the receptacle and having inwardly opening valve-controlled communication with the receptacle, and having a tube extending upwardly into the head member in communication with said nozzle and in outwardly opening valve-controlled communication with said cylinder, a plunger in said cylinder, a rod extending upwardly from the plunger into the head member to near the upper end thereof, means normally moving the rod in one direction, a U-shaped lever mounted in the upper end of the head member in straddling relation to said tube and Having the free ends of its legs engaged to said rod, the fulcrum of said lever being at the op 0- site side of said tube to said rod, and a tugger pivoted to the upper end portion of the lever with an operating part projecting with out the head member and with a part projecting into said member and engaging the looped end of said lever, whereby an inward movement of the trigger will impart a rodactuating movement to the lever in opposition to said other actuating means.

In testimony whereof I have hereunto signed my name to this specification.

HAROLD A. ROSELUND.

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