US2844287A - Grease gun conversion unit - Google Patents

Description

July 22, 1958 W. H. BRANDT ET AL GREASE GUN CONVERSION UNIT 2 Sheets-Sheet 1 Filed Aug. 10. 1956 m n mmfi w V r m 4m H .o m MT m T M. n n

July 22, 1958 w. H. BRANDT ET AL 2,844,287

GREASE GUN CONVERSION UNIT 2 Sheets-Sheet 2 Filed Aug. 10. 1956 INVENTOR. W/l/id/n /7- Branch BY Ear/ fl Half/n I HT ORNEY United States Patent GREASE GUN CONVERSION UNIT William H. Brandt, Emerson, Nebn, and Earl H. Martin, Sioux City, Iowa Application August 10, 1956, Serial No. 603,383

4 Claims. (Cl. 222-326) Our invention pertains to a grease gun conversion unit.

An object of our invention is to provide a simple unit which can be used in combination with the conventional type of grease gun, and whereby in one form, the extra cumbersome parts of the grease gun need not be used.

A further object of our invention is to provide a simple arrangement which can be readily attached to standard grease guns, and wherein by eliminating the above mentioned cumbersome parts, the filling of the gun can be made much simpler. a

A further object of our invention is to provide a simple cartridge arrangement for use with such grease guns.

A further object of our invention is to provide a simple construction capable of easy manufacturing' With these and other objects in view, our invention consists in the construction, arrangement, and combination of the various parts of our device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in our claims, and illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal section taken of a grease gun with our arrangement incorporated therein,

Figure 2 is a detail of the cylindrical grease container carton,

Figure 3 is an enlarged detail, 1 Figure 4 is a sectional view of a modification, Figure 5 is a detail of a cartridge,

Figure 6 is a modification, and Figure 7 is a further modification. We have used the character 10 to designate the cylin drical barrel of a standard grease gun, this barrel usually being threadably engaged at 11 with the usual threads 12 of the standard head portion 13, to which is attached the spout 14 having the nozzle end 15. The member 13 includes the opening at 16 communicating with the ball valve 17, the member 13 also-including the rod 18 and piston 19, the rod 18 being pivotally connected at 20 to the handle 21 which is pivotally connected at 22 to the link 23 which acts as a bracket for supporting the arm 21 and allows pivotal movement thereof, and it should be specifically understood that these various members are the usual standard members of such guns.

Threadably engaged at the rear of the barrel 10 is the cap member 24. In this standard type 'of gun there is usually provided a rod which passes through the opening 25 in the cap 24, this rod being attached to a suitable washer or piston which is adapted to reciprocate within the barrel 10 and also includes a compression spring receiving this rod with a handle being attached to the rod, so that when it is desired to fill the barrel 10, this above described assembly and the barrel must be removed and held in a retracted position while the barrel is being filled, thereby providing a rather cumbersome arrangement which is difficult to operate and which results in inconvenience to the operator.

Our invention anticipates the elimination of such a cumbersome arrangement, and in our form of the device, this assembly of the washer, spring, etc.-, are completely 2,844,287 Patented July 22, 1958 "ice removed and the members about to be described are provided.

To provide this improved feature, we provide a cylindrical member 26' having the annular flanged integral portion 27 which portion 27 includes the threads at 28, which threads 28 are screwed into the threads 12 of the portion 13, and next the barrel 10 is screwed inwardly into the same threads 12 and as shown in Figure l, which will provide means for firmly supporting the cylindrical member 26 which is open at both ends.

It will be noted that the cylindrical member 26 is of such diameter as to leave an annular cylindrical space 28a between the member 26 and the barrel 10.

For providing the grease units, we provide a cylindrical pasteboard member 29 having the rear end cap 30 and the forward recessed cap 31' having the annular flange 32, a pull tab 33 being attached to the cap 31 to render easy removal thereof.

The device is used in the following manner. After the assembled rod, washer, and spring have been completely removed, the unit is then attached so that it will appear as shown in Figure l, and then one of the units 29 is opened by removing the forward cap 31, and the cylindrical portion 29 of the carton is placed into the space 28a and forced toward the head 13 so that as a result the grease 34 will be forced into the member 26. This is the priming operation to initiate the action of the gun, and next, a further carton is employed (after the cap 30 or the first priming member 29 is used) with the cap 31 being removed and with the ends of the member 29 being placed in the space 28a a slight distance, since the space left by the flanges 32 will permit this,

and the gun is then ready for operation. By oscillating the handle backwardly and forwardly in the direction of the arrows 35, the action of the piston 19 and the ball 17 will provide means whereby the grease is first pumped past the ball 17 toward the opening 16 and is thenforced through the opening 16 into the spout 14 when the ball closes the valve, so that as a result, the successive pumpour invention wherein the retractable plunger commonly used in such greaseguns is used, with the exception, however, that a cartridge form for containing the grease 'is also used to eliminate the inconvenient method of filling the barrel, and in this form of structure identical characters will indicate identical portions as illustrated in Figures 1 to 3 inclusive.

For this purpose we provide a longer carton, indicated generally by the character 36, it being understood that" this carton can be of any desired length, althoughit' should substantially fill the length of the barrel 10.

In the form of device, we use a small cylindrical member 37 having the tapered portion 33, the member 37 having the flange portion 39 threadably engaged at 40 with the threads 12 of the standard head portion, the diameter of the member 37 being lesser than the diameter of the barrel 10 to accommodate the end of the carton 36 when the cap member 31 is removed, it being noted that the cap member will be the same as the cap member shown in Figure 2, the carton 36 also including an identical cap member such as 30. The cylindrical walls 41 of the carton 36 can include the tapered ends at 42 to allow the easy entrance of the piston or leather washer 43, which is the standard construction employed in the gun, and in this form of structure, the character 44 will designate the plunger rod, the character 45 indicating the handle, and positioned between the cap 24 and the plunger is the helical compression spring 46', this arrangement thereby providing means for providing pressure against the grease when the handle is released.

In using this type of the device, the rod 44 is pulled outwardly in the direction of the arrow 47 and the arrangement is locked in the usual manner, and next, the caps 31 and 30 are removed from the cartridge 36, which cartridge already contains the grease, and the cartridge is then inserted, with the end of the cartridge being snugly adjacent to the cylindrical member 37, the tapered shoulder 38 permitting the cartridge to slide easily there on, and by virtue of this snug engagement, the arrangement will be relatively air-tight, and the barrel can then be screwed on to the threads 12. The rod .44 is then released, whereby the washer '43 will enter into the cartridge 36 and the arrangement is ready for operation in the usual manner. It will thus be noted that a convenient device is supplied which allows convenient and ready filling of the gun without the messy or cumbersome old arrangement. When the washer 43 abuts against the end of the member 37, it will indicate to the operator that the cartridge is emptied.

Figure 6 illustrates a slight modification wherein the head 13 includes an integral cylindrical member 48 formed therewith which will-therefore provide the same function as the other arrangement.

Figure 7 illustrates a further modification wherein the cylindrical member 37 includes a tapered shoulder 49 and with the cartridge walls 50 being inserted within the member 37, it being understood that either form can be used, and preferably the form shown in Figure 4.

1-It will now be seen that we have provided the various advantages set forth in the objects of our invention with various other advantages being readilyapparent.

Some changes may be made in the construction and arrangement of the parts of our invention without departing from the realspirit andpurpose of our'invention, and it is our intention to cover by our claims any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

We claim as our invention:

1. In combination with a standard grease gun having a barrel portion, and a forward nozzle portion, a .conversion unit for reception into said barrel comprising a cylindrical grease receiving member, said member being detachably connected to said forward nozzle portion, a cylindrical carton containing grease, said cylindrical grease receiving member being of lesser diameter than said barrel to thereby provide an annular cylindrical space therebetween, the walls of said carton being received in said space when the contents of said carton are thrust forwardly into said grease receiving member, said cylindrical carton being approximately the length of said barrel,

and a reciprocating piston in said barrel portion of said.

cylindrical grease receiving .member, said member being detachably connected to said forward nozzle portion, a cylindrical carton containing grease, said cylindrical grease receiving member being of lesser diameter than said barrel to thereby provide an annular cylindrical space therebetween, the walls of said carton being received in said space when the contents of said carton are thrust forwardly into said grease receiving member, said cylindrical carton being approximately the length of said barrel, and :a reciprocating piston in said barrel portion.

of said gun being adapted to be received within said carton, said cylindrical grease receiving member being of limited length compared to said carton.

3. In combination with a standard grease gun having a barrel portion, and a forward nozzle portion, a conversion unit for reception into said barrel comprising a cylindrical grease receiving member, said member being detachably connected to said forward nozzle portion, a cylindrical carton containing grease, said cylindrical grease receiving member being .of lesser diameter than said barrel to thereby provide an annular cylindrical space therebetween, the walls of said carton being received in said space when the contents of said carton are thrust forwardly into said grease receiving member, said cylindrical carton being approximately the length of said barrel, and a reciprocating .piston in said barrel portion of said gun being adapted to be received within said carton, said cylindrical grease receiving member being of limited length compared to said carton, said cylindrical grease receiving member having a tapered annular shoulder for freely receiving the end of said carton.

4. In combination with a standard grease gun having a barrel portion, and a forward nozzle portion, a conversion unit for reception into said barrel comprising a cylindrical grease receiving member, said member being detachably connected to said forward nozzle portion, a cylindrical carton containing grease, said cylindrical grease receiving member being of lesser diameter than said barrel to thereby providean annular cylindrical space therebetween, the .walls of said .carton being received in said space when the contents of said carton are thrust forwardly into said grease receiving member, said cylindrical carton being approximately the length of said barrel, and a reciprocating piston in said barrel portion of said gun being adapted to be received within said carton, said cylindrical grease receiving member being of limited length compared to said carton, said cylindrical grease receiving member having a tapered annular shoulder for freely receiving the end of said carton, said carton including .a recessed forward end cap to provide means for entering said carton between said cylindrical grease receiving :member and said 'barrel, said carton including a rear cap, the :rear end .of said carton having a tapered portion for providing convenient entrance of said piston.

"References Citedin the file of this patent UNITED .STATES PATENTS 2,271,261 Hunt Jan. 27, 1942 2,512,178 Sherbondy June 20, 1950 2,602,571 Sherbondy July 8, 1952 2,629,517 -Sl0blIl Feb. 24, 1953

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