US1538721A - Transmission-clutch-disk-drum puller - Google Patents

Description

May 19, 1925.

MERDIAN TRANSMISSION CLUTCH DISK DRUM FULLER Filed May 27, 1924 if it I Patented May 19, 1925.

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' TRANSMISSION-CLUECH -DISK-DBUM PULLEB.

Application filed May 27,

To all whom, it may concern:

Be it known that T, FRED MERDIAN, a citizen of the United States, residing at Vancouver, in the county of Clarke and State of Washington, have invented certain new and useful Improvements in Transmission- Clutch-Disk-Drum Pullers, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to devices for pulling parts mounted upon a shaft off of the shaft, and particularly to a disk drum puller designed for pulling transmission clutch disk drums from. the shaft in the repairing of Ford automobiles.

In Ford automobiles the transmission clutch disk drum is mounted on a shaft and keyed into position, and this transmission clutch disk drum is disposed within the clutch disks, which are in turn disposed within. the brake drum. This leaves but very little room to get at this disk drum when it is desired to remove it. For the purpose of removal, the drum is formed with two holes in its periphery intended to be engaged by pins on a pulling device and the screw in the head of the pulling device presses on the end of the shaft as the screw is forced inward, thus drawing the disk drum off the shaft. A puller of somewhat diiferent design is distributed by the manufacturer of the Ford machines for use in performing this operation, which puller has a single arm on each side, the hole in the disk drum being threaded. In placing this puller'in position, it is necessary that the pin be screwed through the threaded hole and thus into engagement in the hole in the drum. This is difiicult work because of the lack of room and takes considerable time to effect the properengagement between the pins and the drum. After the pins are engaged, how ever, there being but one arm to the device, the pull is not direct but slightly sidewise and, therefore, thestrain on the arm, if the drum happens to be tight, is such that the pins are continually pulling out and the arms being sprung or broken.

The object of my invention is to provide a very simple, readily operated and effective device of this character in which there is a central body with longitudinally extending arms, the central body having a screw adapted to bear against the shaft and the arms which extend parallel to said screw being cleft or slotted at their extremities so as to embrace "the edge of the drum. Extending across these slotted arms are pins which are adapted to be passed through the holes in the drums. Thus there are no parts which have to be threaded in to the drum and the strain is equal on both arms and on opposite points of the drum so that there 1s no tendency of the device to place a sidewise pull upon the disk drum and there is no tendency of the pin to break.

Myinvention is illustrated in the accompanying drawing, wherein Figure 1 is a transverse sectional view through a disk drum and through my drum puller;

Figure 2 is a perspective view of the puller.

Referring to this drawing, 10 designates a body formed with the longitudinally extending, approximately parallel arms 11. The middle portion of this body is enlarged, as at 12, to form a more or less cylindrical portion but this portion has a screw-threaded bore 13 through which the screw 14 passes, this screw being pointed at one end and at its outer end provided with a head whereby it may be readily of the arms are longitudinally slotted, as at 15. The arms 11 are bored transversely to the length of the slots 15 for the passage rotated. The extremities of pins 16, these pins being smooth and provided with heads 1?, the shanks of the pins being formed attheir extremities wlth cotter pin passages 18 if desired. v

In the use of this device, the slot in each arm 12 enables each arm to straddle the edge of the drum and then the unthreaded pins 16 may be slipped through the bores 15 and through the holein the drum A. Then the screw 1 1 is turned in and the pull comes straight on the two edges of the slot and onthe two ends of the pin on each side of the rim of the disk, thus doing away entirely with any tendency to break the pin or with any sidewise pull and doing away with the labor involved in getting a threaded pin in position.

1. A puller for disk drums comprising a U-shaped body to provide parallel arms, the arms at their extremities being lon itudinally slotted, the slots extending to tie ends of the arms and the ends of the arms being transversely apertured, pins adapted to pass through the apertures, and a centrally disposed screw extending parallel to the arms and between the same.

2. A disk drum puller of the character describe-d comprising a body being U-shaped in form to provide parallel arms, the extremities of the arms being longitudinally slotted, the slots extending to the ends of the arms and the extremities of the arms being transversely apertured, unthreaded pins passing through said apertures and having heads at their outer ends and at their inner ends being apertured for the pas- 15 In testimony whereof I hereunto aflix my 2 signature.

FRED MERDIAN.

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