US1095616A - Pipe-wrench. - Google Patents

Description

B. P. ADAMS.

PIPE WRENCH.

APPLICATION FILED MAR .12, 1913.

Patented May 5, 1914.

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BENJAMIN F. ADAIIIS, F STBATFORD, TEXAS, ASSIGNOR OF ONE-HALF T0 1?. G. FOXW'ORTH, OF STRATFORID, TEXAS.

PIPE-VTRENCH.

T0 aZZ whom it may concern Be it known that I, BENJAMIN F. ADAMS, citizen of the United States, residing at Stratford, in the county of Sherman and State of Texas, have invented certain new and useful Improvements in Pipe-Wrenches, of which the following is a specification.

This invention relates to an improvement in pipe wrenches.

The primary object of the invention is to provide a pipe wrench which may be readily adjusted to pipes which vary in diameter and in which the movable jaw member will be resiliently held in contact with the work.

A further object of the invention is to provide a construction which, while strong and durable, may be manufactured at a comparatively low cost.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a side elevation; Fig. 2 is a perspective view; Fig. 3 is a perspective view of the resilient member which engages with the pivoted jaw; and Fig. 4 is a perspective view of the pivoted jaw.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters.

In the drawing, 10 designates the shank of a wrench which is formed with a curved extension 11, the inner face 12 of which is provided with a plurality of teeth 13. A jaw member 14 is pivotally supported on the shank. This jaw member consists of the curved work engaging face 15 provided with a plurality of teeth 16, the teeth being'oppositely disposed to those of the work engaging face 12 of the curved extension which forms the other jaw member. The body portion 17 of the jaw 14: is provided with the spaced parallel arms 18 which at their terminals are apertured, receiving a pivot pin 19 which passes through them and the shank 10.

A sleeve 20 is either formed integral with or secured to the shank 10. This sleeve is disposed below the pivot point of the jaw 14. A flat spring 21 is arranged on one face of the shank 10, said spring being provided at one of its terminals with a yoke 22 which embraces the shank. The spring 21 extends through the sleeve 20 being provided adjacent its free terminal with lugs 23 which Specification of Letters Patent.

Application filed March 12, 1913.

Patented May 5, 1914.

Serial No. 753,818.

contact with the sleeve'to prevent the displacement of the spring. The yoke 22 is preferably formed integral with the spring and comprises an extension 24 which embraces the shank, and a second extension 25 which extends transversely of the shank, the extensions being secured together. The sleeve 20 is secured to the wrench after the spring has been placed thereon, the side portions of the sleeve being either welded to the wrench ora bolt may be passed through both of said side portions and the shank. In this construction the sides of the yoke extend midway across the shank to permit of the formation of a bolt-hole therein without weakening the same.

The yoke 22 of the spring is disposed to contact with the shank 10, the spring being moved longitudinally of the shank as the jaw is opened in order that the jaws may accommodate work which varies in diameter. In placing the wrench on a pipe, the yoke of the spring is moved longitudinally of the shank and the pivoted jaw member allowed to open. After the pipe has been grasped between the jaws, the spring is moved toward the jaw, its terminal 26 contacting with the jaw and maintaining the same in engagement with the pipe. It will be noted that the pressure of the pipe on the jaw will prevent the spring from moving longitudinally of the shank, the spring preventing the jaws from falling off the work when the same is moved loosely on the work. It will be noted that normally the spring may slide freely on the shank but that when the same is forced in contact with the jaw, the aw and spring will be held against displacement. When a pipe or other piece of work is placed between the jaws the body 14 will be moved against the tension of the spring and the spring will bow, slightly bending at the point where the same extends through the sleeve which is arranged on the shank, the lower portion of the spring and the yoke which is formed integral therewith being brought into binding engagement with the sleeve and the shank, efiectually supporting the spring against slipping and the jaw against movement except such as is permitted by the resiliency of the spring between the sleeve and the aw. Thus the pressure of the work supports the spring against movement longitudinally of the shank.

When it is desired to release the jaw, the spring is drawn toward the terminal of the shank and the jaw permitted to open. Particular attention is called to the peculiar construction of the jaw member and the manner in which the same is resiliently supported in contact with the work. It will be seen that normally the spring will maintain the straight edge 27 of the jaw member 1% in contact with the edge of the shank, and that when not in use the pivoted aw member will not swing loosely which is a decided advantage in handling the wrench.

It will also be noted that the entire construction is such as may be easily and economically manufactured, and that the various parts may be readily assembled.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1 A wrench comprising a shank provided with a jaw, a jaw pivotally mounted on the shank, said jaw being formed with spaced arms which embrace the shank, the aw between the arms being formed with. a straight edge disposed to contact with the edge of the shank, a flat spring, a yoke formed integral with one terminal of the fiat spring, a guide carried by the shank through which the spring extends, lugs arranged on the terminal of said spring remote from the yoke, said spring contacting with the pivoted jaw to maintain it in contactwith the work.

2. A wrench comprising a shank provided with a jaw, a aw pivotally mounted on the shank, a spring slidably mounted on the shank, means carried by the shank embracing the spring, one terminal of said spring contacting with the pivoted jaw, and the other embracing the shank.

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

BENJAMIN F. ADAMS. [L. s]

Witnesses O. G. REEDER, M. CAMMAOK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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