US2443981A - Grease gun charger - Google Patents

Description

June 22, 1948. F. F. FUNK ETA'. 2,443,981

GREASE GUN CHARGER Filed March 19, 1945 Patented June 22,A 1948 UNITED STATES PATENT FFICEY Y 2,443,981/ GR-SGUN CliiintGER` Frank F. Funkand Robert D. Funk; Ottawa, Ill. Aspiration Marcha, 194s; sesame. 583,414

(o1.` assume) 3 Claims'. l`

,The presentlinve'ntion relates toa grease guii filler `or charger.

To iill grease guns it has been the custom to remove the rear end cap of the gun barrel `and also the piston, and to then feed inthe grease into the barrel after which the piston was introduced and the cap screwed on the end of the barrel. That was a rather messy job, much of the-grease was lost, air would be entrapped into the grease in the barrel and dirt would also become mixedwith the grease. y l

Among the objects of the presen-t invention is to .produce a novel device that avoids such disl` advantages and wherein the grease is fed directly into the forward end of the gun in front of the piston without any loss of grease and without any entry of air and' dirt'.

Another object-oi the invention is to provide a novel means for use with a commercial grease container and which has a diaphragmatic piston for acting under atmospheric; pressure* and throughout the extent of the grease mass in the container for eicent feed of the grease to the device for charging the grease gun, and being in sealing relation with the contain-er to prevent loss of the grease and to prevent access' of `air and dirt into theA grease.

Other objects, advantages, capabilities, features and the likey arel comprehended by the invention asv wiil later appear and as areinherently possessed by" the invention.

Referring to the drawings: y

Fig. 1 is a view partly in elevation and partly in section of an embodiment of the invention;

Fig. 2 is a longitudinal sectional view of the device; and

Fig. 3 is a transverse fragmentary sectional view taken in a plane represented by line 3--3 in Fig. 2 of the drawings.

Referring more in detail to the drawings, the embodiment chosen to illustrate the invention is shown as comprising an outer hollow cylinder I in which telescopes and reciprocates an inner hollow cylinder 2 having a free open lower end 3 and a reducing coupling 4 at its upper end. To the lower end of the cylinder l is xed a diaphragm 5 by way of a iianged collar 6 suitably secured t the lower end of the cylinder I and to the central portion 'I of the diaphragm 5, as shown. The perimetral portion of the diaphragm has a shoulder or fillet 8 for holding an annular packing 9.

The lower end of the cylinder I has an end wall IIJ abutting with the central portion 'I of the diaphragm 5, and both these parts 1 and I0 have avalve port or seat I I for the seating' there; on of a valve I2 normally under the stress of a spring I3 field compressedebetwee'n the Valve I2 anda spider i4 suitably' secured within theminder I` space'dly above the' valve I2, as shown' in Fig. 2. On the-lower end portion ofthe cylinder 2 is carried a sealing ring I5. Within' the upper end portion of' the' cylinder 2' is iiiied awall or disc I6 having a valve port o'r se'at I7 for the seating thereon of-a valve I3 normally1 under the stress of al spring'- |39 held compressed between the; valve I8"a`iid"a spider ftzsuitablyxed toand within the cap" or coupling' e; as shdwn in Fig. 2. 'rol the upper' end of thefcapt is connected" a hippie 2"! wnieiif may have a threaded upper por; tion22`.

Thisidevice is designed for usewitha coin-` merci-al type ofgrase' container having' a cylindrical body 23"`provid`ed with a` bottom 24 and forjcontai-riing greasew On the *barrely or cyl` i-nder I maybe sl'idably. associated a cover 26 having a resilient rim' 21 adapted iujjisnapl onto the upper rim 2a ofthe container 23 after the usual cover that copies with tl'i'eI container 23 has been' removed. The dia'phiagin 5"ii`ts" closely within the container vetheilwhole area of the' grease" 25 and with the lackrig` 9111i sealing engagement with the inner wall of the` container 23 so' that as the atmosphereforces down the diaphragnr 5 upon" the` grease'v 25 the grease will remain level.

To* the upperend of the nipplej @il isconnected a greaseJ gun 29 having a barrel 33, a n'ozlzlev 3i', a stem 32, a tip 33, a piston 34 slidable in the barrel 3D, a piston rod 35 passing through the rear cap 36 on the barrel 30, and a handle 31 on the exterior end of the piston rod 35.

Secured to a side portion of the nozzle chamber 3l isa stub or nipple 33 preferably having a suitable check valve 39 therein and rotatably connected with this nipple is a coupling nut 4D adapted for ready connection with and disconnection from the threaded portion 22 of the nipple 2|.

In use, when the piston 34 of the gun has reached rits inward position at the end of the greasing operation, see Fig. 1, the nipple 38 is connected to the nipple 2I by screwing the coupling nut 46 upon the threaded end 22, and then, using the gun 29 as a handle, the cylinder 2 is forced down in the 'cylinder I, whereupon the grease in the cylinder 2 moves up by way of the valve I3, coupling 4, nipples ZI and 38 and into the chamber of the nozzle 3|, to move the piston 34 rearwardly until the gun is iilled with the grease. Then the gun is disconnected. The

check valve 39 automatically closes to prevent loss of grease from the nozzle 3|.

When the cylinder 2 is pulled upwardly, the valve I8 closes and the vatmospheric pressure acts down on the diaphragm to force grease 25 from the container 23 by way of the valve II-I2 into the barrel I, below and against the grease already in the cylinder 2. Because the diaphragm 5 is of comparatively much greater eiTective area than that of the cylinder I the downward thrust of the atmosphere upon the diaphragm 5 is much greater than the upward pull of the cylinder 2. Therefore, there is no necessity for holding the cylinder I, as by the operators hand, when the cylinder 2 is pulled up.

While the invention has been described in an illustrative way as applicable to the supplying or charging of grease to a grease gun, it is to be understood that the invention also applicable to grease cups, grease lines, and the like for the supplying, dispensing or charging of grease thereto.

While We have herein described and upon the drawings shown an illustrative embodiment of the invention, it is to be understood that the invention is not limited thereto but icornprehends other constructions, arrangements of p-arts, details, features and the like without departing from the spirit of the invention. l

Having thus disclosed the invention, We claim:

1. A grease gun charger comprising a pair of telescopically and mutually rec'iprocable hollow cylinders having valves at their outer ends for controlling the movement of grease in one direction through said cylinders when said cylinders are mutually reciprocated, the inner end of the inner cylinder of said cylinders having an opening for the full extent of the cross-sectional area of said inner cylinder, a diaphragmatic type of piston attached to the outer end of one of said cylinders and being of a size to sealingly and slideably iit into a commercial type of grease container for forcing grease from said container into said cylinders under the force of atmospheric pressure acting on said piston in said container, and said piston having a port opposite the valve in the outer end of the cylinder to which said piston is attached.

2. A grease gun charger comprising a pair of telescopically and mutually reciprocah-le hollow cylinders having valves at their outer ends or controlling the movement of grease in one direction through said cylinders when said cylinders are mutually reciprocated, the inner end of the linner cylinder of said cylinders having an opening for the full extent of the cross-sectional area o said inner cylinder, a diaphragmatic type of piston attached to the outer end of one of said Cylinders and being of a size to sealingly and slideably fit into a commercial type of grease container for forcing grease from said -container into said cylinders under the force of atmospheric pressure acting on said piston in said container, and said piston having a port opposite the valve in the outer end of the cylinder to which said piston is attached, and said port having a valve seat for the seating thereon of said 'last mentioned valve.

3. A grease gun charger comprising a pair of telescopically and mutually reciprocable hollow cylinders having valves at their outer ends for controlling the movement of grease in one direction through said cylinders when said cylinders are mutually reciprocated, the inner end of the inner cylinder of said cylinders having an opening for the full extent of the cross-sectional area f of said inner cylinder, a diaphragrnatic type of piston attached to the outer end of one of said cylinders and being of a size to sealingly and slidea-bly fit into a comercial type of grease container for forcing grease from said 4container into said cylinders under the force of atmospheric pressure acting on said piston in said container, and salid piston having a port opposite the valve in the outer end of the cylinder to which said piston is attached, and said piston having a rim provided with packing means for sealingly engaging with the wall of said container.

FRANK F. FUNK. ROBERT D. FUNK.

REFERENCES CITED rIhe following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,703,286 Zerk Feb. 26, 1929 1,750,151 Albertine Mar. 1l, 1930 1,807,421 Mahoney May 26, 1931 1,955,339 McConkey Apr. 17, 1934 2,001,568 Creveling May 14, 1935 2,045,297 Gray June 23, 1936 2,057,874 Barks et al Oct. 20, 1936 2,083,590 Barks June 15, 1937 2,393,217 Brewton Jan. 15, 1946

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