US254460A

US254460A - Pipe-wrench

Info

Publication number: US254460A
Authority: US
Publication date: 1882-03-07
Anticipated expiration: 1899-03-07

Description

(No Model.)

M. T. CHAPMAN.

PIPE WRENCH. No. 254,460. Patented Mar. 7,1882.

fi l H c Fifi) egg Q UNITED STATES PATENT QFFICE.

MATTHEW T. CHAPMAN, OF'AURORA, ILLINOIS.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 254,460, dated March 7, 1882.

Application filed December 8, 1880. (No model.)

To all whom it may concern:

Be it known that I, MATTHEW T. CHAPMQN, residing at Aurora, in the county of Kane and State of Illinois, and a citizen of the United States, have invented a new and useful Improvement in Pipe-Wrenches, of which the following is a full description, reference being had to the accompanying drawings, in which Figure l'is a top view. Fig. 2 is a side elevation. Fig. 3-is a bottom view, showing also a coupling. Fig.4 is a bottom view, showing the chains twice around the pipe. Fig. 5 shows a variation.

This invention relates to improvements in devices for rotating iron pipes and couplings; and it consists in the combination, with the lever in a pipe-wrench, of two independent chains, secured one on each side of the griping end of the lever by means of a common bolt, and pins projecting in pairs from opposite sides of the lever at a point in rear of said bolt, as hereinafter described, and particularly pointed out in the claim.

In the drawings, A represents a lever, the end a. of which is serrated, or this end of the lever may be roughened or pointed in any suitable manner.

B 0 represent two chains, which are secured, one on each side of the lever, near the front end, by means of a single bolt, 11, passing through the lever and chains, which bolt can be easily removed if it becomes necessary to repair or replace the chains.

0 c are two pins which pass through the lever and project on each side thereof. These pins are located at a suitable distance back of the point of attachment of the chains. They are a little distance from each other, and are secured firmly in the lever.

D is a piece of pipe.

0 is a coupling.

- In use the end a of the lever is placed on the pipe or coupling to be turned, and the chains are drawn around under the pipe and are secured, one on each side of the lever, by passing them between the pins 0 c, as shown in Figs. 1, 2. Then by raising the lever the pipe or coupling will be firmly grasped and can be turned.

If desired, an eye, 11, can be connected with the pins 0 c, as shown in Fig. 5, through which eye the chain can pass. In such case the pins cannot pass through the lever, but an eye, with 7 its pins, must be used on each side.

The described construction has advantages over a device which has a single chain, or a double chain part way, connected to the lever at some distance from the end, between the two parts of which chains the end of the lever is located, among which I mention the following: By using two chains connected to the lever near its front end the chains can be twisted together when a short coupling or pipe is to be rotated, thus for the time being forming a single chain, in effect, which can be passed over such coupling or short pipe, as seen in Fig. 3. If the lever were made to pass between two chains connected some distance from the front end of such lever, this could not be done. By having two chains there is less danger of injuring the pipe, as there is more chain-surface. The two chains, located as described, have a tendency to keep the lever in a straight line, and the strain on the two chains will be nearly uniform.

Sometimes it is desirable to protect the pipe'from being marred. By using two chains arranged as described the pipe can be protected by a piece of copper, leather, or other suitable material placed under the lever, and the chains can be wound twice around the pipe, as shown in Fig. 4, and then they will not slip thereon while the same is being turned.

It is sometimes desirable to rotate a pipe and a coupling of different diameters. By using two chains one of them can be placed around the pipe, the other around the coup ling, and the two chains thus arranged will operate together.

I am aware that a patent has been granted to Eugene H. Robbins for an improvement in pipe-wrenches, dated May 2, 1871, and I do not claim the device therein shown.

What I claim as new, and desire to secure by Letters Patent, is as follows:

The combination, with the lever A in a pipe-wrench, of the two independent chains se-- cured one on each side of the griping end of the lever by means of a common bolt, and the pins 0 c,projecting in pairs from opposite sides of the lever at a point in rear of said bolt, as herein shown and described, and for the purposes specified.

E. A. WEST, o. w. BOND.