US1419282A - Grease cup - Google Patents

Description

n v 2Q lg F W g I i a A /2 M 911/5 g 20 I iii 5 111' ii I l J a; W

INVENTOR.

A TTQRNE Y.

Patented Julius, 1922 ii fit flirll lil JOHN E. MAIN, OF DETROIT, :IICHIGAN.

GREASE CUP.

Application filed January 13, 1921. Serial No. 436,867.

To all whom it may concern."

Be it known that 1, JOHN H. MAIN, a citizen of the United States, and residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Grease Cup, of which the following is a specification.

This invention relates to that type of lubricators known as grease cups, and its object is to provide a device of this charac ter which may be filled by means of sooalled grease guns without the *necessity of removing the cup or any of the parts.

This invention consists of a cylindical body having a top and bottom, the bottom being formed with a threaded discharge connection and the top being apertured to. receive a rotatable inlet tube, the tube being threaded to fit in a threaded piston and the outer end of the tube being closed with a check valve.

It also consists in forming the piston of a pair of circular disks, a cup shaped member of very thin resilient metal between them, and an internally threaded tube having circumferential shoulders to hold the disks together.

It further consists of the details of construction illustrated in the accompanying drawing and particularly pointed out in the claims.

In the drawing, Fig. 1 is a central vertical section of this improved grease cup. Fig. 2 is a section on the line 22 of Fig. 1.

Similar reference characters refer to like parts throughout the several views.

The present invention is designed to take advantage of the fact that cylindrical bodies may be drawn from circular sheets and that although the internal circumferences of such bodies are substantially equal throughout their length, the cross sections are not exactly the same throughout their length. This has been found objectionable as it niade reaming or otherwise machining them necessary. The filling of grease cups by means of grease guns has been attempted but with poor success as the usual cup'must be taken apart to permit filling.

In the present cup, 1 is a cylindrical shell having an end 2, preferably produced by drawing from a circular sheet of metal, and while the end 2 is centrally perforated, the lower end of the shell is threaded to fit within the threaded flange 3 of the base 4 which is formed with a threaded connection 5. This base may also be formed by drawing dies from a circular disk.

A tube 6 is rotatable in the perforation in the end 2 and has a collar 7 secured to it by any desired means, a pin 8 being shown. The lower and main portion of the tube is threaded to receive the threaded hub 9 of the piston which consists of the two disks 10 and 11 held in position by the shoulders 12 and 13, by means of which the circular heads 14 and 15 of the intermediate cup-shaped piston members are held in position. To these circular heads are attached the cylindrical skirtings 16 and 17 which are very thin and resilient. I prefer these skirtings to be only a few thousandths of an inch thick and to be slightly flaring so that the lower edge of the outer skirting will closely fit the inner surface of the body 1. The metal of these sklrtings is so thin that it will conform to every irregularity in the shell 1 and the diameterof the lower edge of the outer skirting isjust above thatof the shell so that leakage between them of grease is pre; vented.

After the upper end of the tube 6has been passed up through the aperture in the top 2, a winged collar 18 is clipped onto the projecting end, a check valve preferably in the form of a bale 19 is dropped into the reduced end, a spring 20 is positioned by means of a proper tool and the pin 21 is inserted to hold the collar and spring in place. The upper end ofthe tube is preferably formed with a collar 22 to retain a grease gun.

When the grease cup has been mounted on a machine or hearing, the piston is drawn to the top of the body by turning the tube, after which a grease gun is connected to the upper end of the tube and grease is forced down into the cup through the tube 6, the check valve 19 being forced down thereby to permit its passage. the Gullborg Patent No. 1,307,734, dated June 24, 1919, when provided with the coupling shown by the Piquerez Patent No. 1,27 6,108, dated August 20, 1918, may be used for this purpose. Thereafter the collar 18 and the tube 6 may be turned to force down the piston and to squeeze the grease out through the connection 5. The friction between the skirting of the piston and the body 1 is greater than between the tube 6 and the hub 9.

A grease gun such as In some cases it is impossible to attach the grease gun to the outer end of the tube 6, and to render this grease cup of general application I attach a small connector 23 to the body 1 near the bottom 4, as shown in Fig. 1, this connector being formed with a check valve 19, a spring to hold it in place, and preferably with a small pin 21 to support the spring. The action of this connector is the same above described.

The inner skirting 17 and its disk 15 may be omitted if found unnecessary with stiff greases and the various parts of the cup may be changed as to both design and proportion without departing fromthe spirit of my invention as set forth in the following claims.

I claim-: v

1. In a grease cup, the combination of a cylindrical shell, a bottom for-the body having a discharge opening, a top for the shell provided with a central opening, a tube rotatable inuthe opening and a collar on the tube below said top, a second collar attached to the tube above the'top, a check Valve in the upper end of the tube to prevent the escape of the contents of the cup, said tube having a threaded exterior ,withinthe body,

and a'piston screwed, onto the tube provided with athin resilient skirting engaging the interior surface ofthe shell to prevent the rotationof the piston in the cup.

2. A- piston for grease lcups comprising a hub, a pairv of supporting, diskssecured' thereon, and a plurality of thin metal disks between the supporting disks, said thin disks having cylindrical skirtings, one within the other, extending down from the circumference of said disks with the lower edge of the outer skirting adapted for engagement with the interior of the shell, and heads attached to said skirtings and secured between the disks.

3. In a grease cup, the combination or a cylindrical shell, a top and a bottom having a discharge opening, said top having a central opening, a screw threaded cylindrical member rotatable in the opening and having a threaded exterior within the body, means to rotate said cylindrical member, a piston screwed onto the cylindrical member and comprising a pair of supporting disks and a thin pressed sheet metal disk between the supporting, disks and provided with a thin resilient skirting engaging the interior cylindrical surface of the cup, said cup having an inlet openingthrough which grease may be introduced, anda check valve to normally close said inlet opening;

l. piston forgrease cups comprising a pair of circular disks, a plurality of thin -metal heads between the disks and a thin resilient cylindrical skirting attached to the edge 0i each head, the outer skirting engagng the interior-suri'ace of the shell or the grease cup.

' JOHN H. MAIN.

Images