US1449016A - Grease cup - Google Patents

Description

Mar. 20, 1923.

F. SMITH GREASE CUP Filed Dec. 5, 1921 E 5 ao 42 mmm@ Mattei' ne Patented Mar. Ztl, i923..

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FRANK SMITH, OF CHICAGO, LLINOIS.

GREASE CUP.

Application filed December 5, 1921. Serial lilo. 520,011.

To @ZZ 107mm it muy concern Be it known that l, FRANK SMITH, a citizen of. the United States, residing at Chicago, in the county ot Coole and State of illinois, have invented certain new and useful improvements in Grease Cups, of which the Jfollowing is a specification.

This invention relates to grease cups, and comprises a cup or casing having a plug mounted therein, the plug being adapted to feed the grease to the machinery to be lubricated.

An object of the present invention is to provide means to retain the plug in position and prevent accidental displacement thereof. ln the form of the invention disclosed, the cup is provided with internal threads adapted to be engaged by external threads formed on the plug, and alocking member is provided to prevent the plug from unscrewing.

rIhe locking member issecured to the plug by suitable means, and is adapted to revolve therewith but is capable ot limited longitudinal movement with respect to the plug. To release the plug, it is first necessary to raise the locking member and a spring is provided to normally retain the locking member in lowered position. The invention further comprises means for lifting the locking member when the plug is to be released.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing:

Figure 1 is a side elevation of one Jform of a grease cup embodying the invention,

Figure 2 is a yvertical sectional view,

Figure 3 is a horizontal sectional view on line 3 3 ot Figure 1, and,

Figure 4 is a detail view of the grease cup showing the parts disassembled.

Referring to the drawings, the reference numeral 1 Vdesignates the body of the cup which is provided with external threads 2, at its lower end, and is adapted to be received in a member to be lubricated. The exterior is provided with a hexagonal portion 3 for the reception of a wrench or other tool to permit the cup to be fastened to the machine or other part to be lubricated. Above the hexagonal portion, the cup is arranged in the form ot a cylinder It having internal threads 5. The grease is adapted to be received in the lower portion ot the cup, as indicated at 6, and fed.

through the lower open end. A plug 7 is arranged within the cup, the plug being provided with external threads 8 adapted to engage the internal threads of the cup. The bottom of the plug is closed by a plate 9 and the upper end is closed by a plate 10, having a rectangular opening 11 formed therein.

A locking member extends through the rectangular opening in the plug. As shown, the locking member comprises abody portion 12, having an opening 13 in its lower end. The body portion of the locking member is hollow and is adapted to receive a bolt 14|: which is provided with screwthreads 15 on its lower end adapted to be received in an opening in the bottom of the plug. The end of the bolt may be flattened, as at 16, preventing it from becoming displaced. The bolt is surrounded by a spring 17 which tends to hold the locking member in the lowered position. The upper end of the locking member is provided with a head 18 in the form of anut, for the reception of the tool, and this head is provided with an annular flange 19.y Arranged on the under side of the head are a pair of lugs 20, which are adapted to engage notches 21 formed on the upper end oli' the cylindrical portion of the cup. The upper end of the cup is provided with inclined portions 22, connected to the notches, and it will be apparent that when the lugs 20 ride over these inclined portions and pass the notches 21, it is impossible to turn the locking member and plug in a reverse direction to release the plug.

Means are provided for releasing the locking member when desired. A s shown, a sleeve 23 surrounds the cylindrical portion of the cup, the upper edge of the sleeve engaging the flange 19. The lower edge of the sleeve is provided with cutout portions forming notches 2i and cams 25. A notch 26 is provided at the opposite end of the cam which is of less depth than the notch 2i. The bottom of the cylindrical portion of the cup is provided with lugs 27 adapted to enter the notches 24C. The sleeve may be provided with openings 28 Jfor the reception ot' a wrench or other tool.

in operation, the cup is filled with grease, and the parts assembled, as showin in Figures 1 and 2. 1When the plug has been inserted to the depth shown, the lugs 20 are in engagement with the notches 21 and movement of the locking member and plug in a reverse direction is prevented. The locking member, however, is capable of vertical movement with respect to the plug but is normally retained in lowered position by spring 17. When the cup is to be opened, the locking member is first raised through the medium of the sleeve 23. When the parts are in assembled position, the lugs 27 are received in the notches 24C, as shown in Figure l of the drawings. By placing a suitable tool in the openings 28 and revolving the sleeve, the sleeve rides upwardly due to the engagement of the cam portion 25 and the lug 27. This raises the locking member 12, and disengages the lugs 2O from the notches 2l which permits the plug and locking member to be turned in a reverse direction. When the sleeve is revolved, the legs engage the notches 26 which are ot less depth than the notches 24 and which retain the locking member in raised position.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement ot parts may be resorted to without departing from the spirit or' the invention or the scope oi' the sub-v joined claims.

I claim:

l. A grease cup comprising a casing having internal threads, a threaded plug adapted to be arranged therein, a locking member secured to said plug, said member being adapted to positively lock said plug against rotation` saidlocking member being capable of independent reciprocatory movement longitudinally of said casing, and rotatable means for moving said locking member to release said' plug.

2. A `grease cup comprising an outer casing having a threaded opening, a threaded plug mounted therein, a locking member secured thereto, said locking member being capable of independent longitudinal movement and a rotatable sleeve surrounding said casing and engaging said locking member to move it to inoperative position.

3. A grease cup comprising an outer casing, having a threaded opening, a threaded plug adapted to be received in said easing, a locking member secured to said plug to member being provided with lugs adapted to enter said notches, and a sleeve surround ing said casing and engaging said locking member, said sleeve being provided with cut-out portions on its lower edge and cam portions extending trom said cut-out portions, said casing being provided with lugs adapted to be received'in said cut out portions and engage said cam portions when the sleeve is revolved to raise said locking member.

A grease cup comprising a. cylindrical casing having an external lug formed at a point snaced from the top thereot and a notch formed at its upper end, said casing being internally threaded, a threaded plug adapted to be mounted in said casing, said plug being hollow and provided with a pol'vgonal opening at its upper end, a locking member includino' a polygonal depending extension mounted in the opening in said plug and provided with an annular flange arranged above said casing and having alug on its under tace adapted to engage the notch in said casing, resilient means for normally forcing said locking member downwardly, and a rotatable sleeve surrounding said casing, said sleeve being adapted to contact with the flange of said locking member and being provided at its lower end with a notch vhaving an inclined face and adapted to receive the external lug on said casing.

In testimony whereof I aiiiX my signature in presence of two witnesses.

FRANK SliII'lH.

. Barinas, JAL/rits Benni?.

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