US1225024A - Pipe-wrench. - Google Patents

Description

M. E. FREEMAN.

.PIPE WRENCH. APPLICATION FILED MAY 16. 1916- 1,%%5 Patentefl May 8,1917.

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MALON E. FREEMAN, 0F COLBY, KANSAS.

FEE-WRENCH.

crease the efiiciency and utility of devices of this character.

Another object of the invention is to provide a simply constructed device which may be readily adjusted to fit pipes or rods of various diameters without structural. change or the necessity of removing any of the arts.

With these and other objectsin view, the

invention consists in certain novel features of construction as hereinafter shown and described and then specifically pointed out in the claims; and in the drawings illustrative of the preferred embodiment of the invention Figure 1 is a side elevation, partly in section, of one of the improved implements applied;

Fig. 2 is a plan view of the parts shown in Fi 1.

l ig. 3 is a detail, illustrating a modification in the construction.

Fig. 4 represents edge views of the links to which the handle is pivoted.

Corresponding and like parts are referred to in the followin description and indicated in all the views 0 the drawings by the same reference characters.

The improved device includes a stock or shank 10 extended at one end into a handle 11 and with a plurality of ratchet shaped teeth 12 in one edge and a longitudinal slot 13 extending through the stock.

A flexible grip device, preferably in chainlike form, forms a part of the invention, and is constructed of a plurality of double links 14 and single links 15, the links preferably having grip teeth 17 in their inner edges to engage around the pipe or rod, indicated conventionally at 18. Qne pair of the double links of the flexible grip member is pivoted intermediate the ends at 16, to the stock 10, so that the grip of this terminal ink is increased when the device is actuated.

The free portions of the handle engaging links are bent outwardly, as shown mere Specification of Letters Patent.

Patented May a, tea a.

I 'ltp p lication filed May 16, 1916. Serial No. 97,894.

clearly inFig. 4, to provide a space for the entrance of the body of the chain when the device-1s employed upon small pipes or rods. Shdably disposed upon the shank 10, is a U-shaped member indicated as a whole at 19,

and bearing against the side faces and across one edge of the stock or shank. Disposed between the sides of the member 19, is a detent like member 21, the member 21 being rigidly secured to the member 19 by rivets 22. At its inner edge, the member 21 is provided with a toe 23 to engage in the teeth 12, one at a time, and with a rearwardly directed hook 24 at its outer edge to receive one of the pivots 25 of the flexible grip member.

Connected within the member 19 is a spring 26 operating to maintain the toe member yieldably in engagement with one of the teeth of the stock, as shown in Fig. 1.

The inner end of the slot 13 is so spaced from the pivoted terminal link of the gripping element and the pin 20 so located in the slide, that the pin will serve as a stop to the slide at one end of its movement and thus prevent the slide from striking the flexible element.v The slot thus limits the movement of the slide and protects the flexible element from injury. The pin and slot also coact to form a guide to the slide so that the detent does not necessarily drag over the teeth of the stock when being adjusted. The pin also serves as a pivot on which the slide operates when being adjusted irrespective of its position on the stock.

The slot and in thus coact and serve in a threefold capaclty.

With a device thus constructed, when it is desired to grip and'rotate a pipe rod, the pivot 25 of the terminal link of the gripping chain device is detached from the hook 24 and the chain passed around the pipe or rod and the pivot 25 again engaged with the hook 24. The member 19 is then adjusted upon the stock until the-chain grip device is relatively tight around the pipe. Then, by applying leverage force to the stock, in the direction of the arrow, the gripping chain will he firmly connected to the pipe with the teeth 17 engaging the pipe and preventing slipping of the chain grip. By this means, an eiiectual pipe or rod wrench is produced, which is simple in construction, can be inexpensrvely manufactured and apthe steady movement of the member 19 and prevents all looseness or rattling, and the centrally pivoted link at one terminal of the chain materially increases the effectiveness of the operation.

In Fig. 3 a modification of the construction is shown consisting in dispensing with the member 19 and forming an open hook 27 directly upon the shank 10 to receive the pivot 25 of the chain grip. This simple construction may be employed under certain conditions, if required.

The terminal links shown detached in Fig.

4 will preferably be of increased strength as the bear the greatest strains.

aving thus described the invention, what is claimed as new is:

1. An implement of the class described, comprising a stock terminating in a handle and with a plurality of teeth in one edge and with a slot extending in parallel relation to the longitudinal plane of the stock, a flexible pipe engagin member connected at one end to said stoc a U-shaped slide engaging said stock and including sides spaced apart, a detent rigidly connected between said spaced sides and engaging said teeth one at a time and having a hook adapted to be engaged by said pipe engaging member, a pin extending through the slide of the slot, the slot guiding the slide and limiting its movement in both directions and the pin serving as a pivot on which the slide oscillates and a spring operating to maintainksaid detent yieldably engaged with said stoc 2. An implement of the class described comprising a stock having teeth at one edge and a longitudinally directed guide slot, a flexible gripping element swinging at one end from said stock, a slide movable upon said stock and having a detent for engaging said teeth one at a tame and a hook for receiving one of the units of the gripping element, and a pin extending through the slide and through the slot guiding the slide and limiting its movement in both directions and the pin serving as a pivot to the slide.

In testimony whereof I aflix my signature.

MALON E. FREEMAN. [L. s.]

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