US518517A - John p - Google Patents

Description

(No Model.)

J. P. WYNN 8v T. W..GILLESPIE.

PIPE WRENGH.

No. 518,517. Patented Apr. 17, 1894.

l I l UNITED STATES PATENT GEEICE.

JOHN P. WYNN AND THOMAS W. GILLESPIE, 0F LOCK HAVEN, PENN- SYLVANIA.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 518,517, dated April 17, 1894. Application led January 2, 1894. Serial No. 495,422. (No model.)

To @ZZ whom it m/y concern..-

Be it known that we, JOHN P. WYNN and THOMAS W. GILLESPIE, citizens of the United States, residing at Lock Haven,in the county of Clinton and State of Pennsylvania, have invented certain new and useful Improvements in Pipe-Wrenches; and we do hereby declare the following to be a full, clear, and

exact description of the invention, which will enable others skilled in the art to which it appertains tomake and use the same.

Our invention relates to various new and useful improvements in pipe wrenches.

The particular objects we have in view are to produce a pipe wrench which can be effectively used with pipes of different diameters, which will be simple in construction, and which will be durable in use.

For a better comprehension of our invention, attention is directed to the accompanying drawings, forming a part of this specification, and in which-- Figure lis a side elevation of theimproved wrench, the jaws being shown in engagement with the pipe; Fig. 2, a plan View; Fig. 3, a longitudinal section, and Fig. 4, a vertical section.

In all of the above views corresponding parts l threaded chamber D, therein, which extends` through the body between the lugs C. Within this working chamber D, is the handle of the wrench, provided with the screw-threaded portion shown, which engages said internally Screw threaded chamber D. An eye is formed on the end of the handle E, by means of which the handle may be supported when not in use, and which also enables the handle to be easily rotated when necessary.

G, is the sliding jaw of the wrench, made preferably of hardened steel. This sliding jaw is of the general shape shown, and is adapted to work closely between the parallel lugs C. The said sliding jaw G, is provided with a chamber a, therein, and with the opening b, which extends from the back of the sliding jaw into said chamber a. The eXtreme front end of the handle E, extends through this opening b, into the chamber a, and is provided with a cap c, within said chamber a, rigidly secured in place, preferably by screw threads as shown. By means of this construction, it will i be apparent that the handle may be revolved so as to move the 6o sliding jaw G, in one direction or another between the parallel lugs C. The bearing face of the sliding jaw is provided on one half with teeth or serrations g, its other halt' being smooth, as shown. The body A, is provided directly back of the parallel lugs C, with smaller lugs H, between which is pivoted the rear end of the pivoted jaw I. This pivoted jaw l is preferably of thegeneralshape shown, consisting of the body e, oblong in cross sec- 7o tion and the sharply curved head f, substantially square in cross section. The inner face of the head f, is provided with teeth or serrations g, thereon, which oppose the teeth d, on the sliding jaw G. The body e, of the pivoted jaw I, is slightly curved, as shown so that when in operation, the direct strain on the pivoted jaw will be brought almost or exactly on a straight line with its pivoting point in'the lugs H. The extreme end of the So inner face of the head f, of the pivoted jaw I, is so arranged that the sliding jaw may be moved up with the corresponding edge of the sliding jaw in engagement with the same, as shown in Fig. 3, whereby the pivoted jaw will 8 5 be securely locked when the wrench is not in use, as will be understood. The extreme rear end of the pivoted jaw I, is cut off at an angle, as shown at h, which cut-away portion will engage with the top of the body A, between 9o the lugs H, so as to limit the movement of the pivoted jaw away from the sliding jaw. The operation of our improved wrench is as follows: The two jaws are inserted over the pipe and the handle E, is screwed up within the chamber D, so as to grip the pipe between the two jaws. Then as the handle is moved circumferentially around the pipe, the tendency of the pipe is to roll and advance the pivoted jaw toward the sliding jaw so as Ioo to bite into the pipe and cause it to be turned. When the handle is retracted, the pipe tends to roll thevtwo .jaws apart so that the smooth part of the sliding jaws will engage with the pipe, whereby the wrench can be moved back into position for a new grip on the pipe.

5 Having now described our invention, what we claim as new therein, and desire to secure by Letters Patent, is as follows:

1. In a pipe wrench, the combination ofthe body A, having the lugs C, the sliding, jaw G,

ro working within said lugs, the handle E, for advancing and retracting said sliding jaw, and the jaw I pivoted to said body and composed of the curved body e, and the sharply curved serrated head, substantially as set 15 forth.

2. In .a pipe wrench the combination of the body A, having the neck B, and the parallel 'lugs C, the internally screw threaded charnber D, in said neck, the handle E, engaging zo with said chamber, the sliding jaw G, swiveled to said handle and working between the lugs C, and the jaw I, pivoted to said body and working over the face of said slidingjaw, substantially as set forth. Y

3. In a pipe wrench, the combination with 25 the body A, having the neck B and the lugs C, of the sliding jaw G, working between the said lugs and having a chamber a, and opening b, therein, the handle e, screw threaded within the neck B, and extending through 3c the opening b, in the sliding jaw G, the cap c, on the end of the handle E, within the charnber et, and the jaw I, pivoted to the body A, and working over the face of the sliding jaw G, substantially as set forth.y 35 In testimony whereof We aflix our signatures v in presence of two witnesses. JOHN P. WYNN. THOS. W. GILLESPIE.

Witnessesz W. O. BENTLEY, C. R. GEARHART.

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