US218195A - Improvement in pipe-wrenches - Google Patents

Description

H. REYN- Pipe-Wrench.

No. 218,195. Patented Aug. 5,1879,-

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HENRY RHYN, OF OMAHA, NEBRASKA.

IMPROVEMENT IN Pl PE-WRENCHES.

Specification forming part of Letters Patent No. 218,195, dated August 5, 1879; application filed March .17, 1879.

To all whom it may concern:

Be it known that I, HENRY RHYN, ofOmaha, in the county of Douglas and State of Nebraska, have invented a new and useful Improvement in Pipe-Wrenches, of which the following is a specification.

The object of my invention is a pipe-wrench constructed as fully described hereinafter. to prevent the Wrench from slipping from the pipe, to insure a firm hold and ready operation, and preserve the operating-spring, and permit ready application to the pipe.

In the drawings forming part of this specification, Figure l is an external view of the tool; Fig. 2, an edge view, and Fig. 3 a detached section.

D is the arm or lever, having at one edge two lugs, (J F, through which extends the threaded rod G, the head I of which constitutes the biting jaw or abutment of the tool. This head is rounded at the outer corner, at, for a purpose described hereinafter, and has bitingteeth.

The rod or stem G is threaded to receive a nut, H, which lies between the lugs O F, and which may be turned to raise and lower the head, the stem G being prevented from turning by a feather, 0, extending into a groove, d, Fig. 3. To an arm, h, at the end of the lever D, is pivoted by a pin, B, the movablejaw A, constructed with two bearing-edges, y 3 about at right angles to each other, and so arranged that when operating upon a rod or tube their point of junction 20 will be directly upon a line, as, passing through the axis of the stem G.

A spring, b, fastened to the arm h, tends to throw the jaw A forward over the abutment I. When the tool is applied to turn a pipe or rod, the edges 3 3 bear upon the same at points about equidistant from the line as, and the head I, being adjusted, bears upon the opposite side of the tube at the point intersected by said line, as shown.

On' turning the lever in the direction of the hand without this positive bearing insuring only a limited play of the jaw A, it would be difficult to use the tool with one hand. Thus, in ordinary wrenches, where the jaw bears on the spring, if the latter is weak and the weight of the tool is brought on the jaw the latter will turn back and the tool slip from the pipe, rendering the use of both hands necessary.

If, to avoid this, the spring is made strong enough to resist the weight of the tool, the jaws are always pressed upon the pipe, and the latter is abraded in turning the tool on the same, and it is difficult and tiresome to work the tool.

By the construction described the jaw can turn back under a slight pressure, but not sufficientl y to permit the tool to slip from the pipe, while the spring will clamp the jaws on the pipe in turning forward. The spring, furthermore, is so concealed that it cannot be injured by blows upon the tool or by striking the latter against hard substances.

I claim 1. The combination, in apipe-wrench, of the lever D, its lugs O F, stein G, carrying the head I and adjusting-nut H, and spring-jaw A, pivoted at B, having griping-faces y y, arranged at right angles, and an inclined face, t. arranged to bear on the end a of the lever when the jaw is thrown back, all as set forth.

2. The combination of the lever D, jaw I, pivoted jaw A, and spring b, arranged between the end of the lever and face if of the jaw A,

as set forth.

HENRY RHYN. Witnesses:

HENRY LAUER, JACOB MEYER.

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