US1354722A - Pipe-wrench - Google Patents

Description

E. BOWEN PIPE WRENCH. Arrucmou FILED SEPT. 29 m9.

1,354,722, Patented Oct. 5, 1920.,

UNITED STATES PATENT OFFICE.

EZRA BOWEN, OF BERKELEY, CALIFORNIA.

PIPE-WRENCH.

T 0 all whom it may concern:

Be it known that I, EZRA BownN, a citizen of the United States,-residing at Berkeley, in the county of Alameda and State of Galifornia, have invented certain new and useful Improvements in PipelVi*e11cl1es, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to pipe wrenches, and the general object of the invention is to provide an extremely simple pipe wrench adapted to it different sizes of pipe without the necessity of using relatively movable clamping aws and attendant mechanism.

A. further object is to provide a wrench which may be made so as to engage pipes of different standard sizes.

A further object is to provide a pipe wrench having a hook-shaped or curved terminal end provided with teeth, the shank of the wrench being so formed that when it is applied to a pipe of the proper size, the shank will force the pipe into engagement with the teeth, the teeth will bite into the pipe and the wrench will bind upon the pipe upon a rotation of the wrench.

Other objects will appear in the course of the following description.

Miy invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a side elevation of one formof wrench constructed in accordance with my invention t Fig. 2 is a perspective view of the form of wrench shown in Fig. 1;

Fig. 3 is a perspective view of a modified form of wrench.

Fig. 4 is a fragmentary elevation of another modified form; and,

Fig. 5 is a view in perspective of the bushing, as disclosed in Fig. 4.

In the drawings I have illustrated three different forms of my invention, the simplest of which is shown in Fig. 1. In this figure, it will be seen that the pipe wrench comprises a bar of steel formed to provide a shank 10, this shank at one end being laterally curved or bowed, as at 11, and then reversely curved, as at 12, so as to form a hook, the inner face 13 of which is directed toward the shank. The extremity of the bill of this hook is formed with teeth 14 and the shank immediately opposite the extremity has a relatively flat and longitudinally extending face 15.

"When this wrench is applied to a pipe of Specification of Letters Patent.

, pipe will Patented Oct. 5, 1920. 29, 1919. Serial No. 327,058.

the proper size, the pipe is embraced between the teeth 14 and the face '15, as illus trated in F 1g. 2, and then power is applied to the wrench in the direction of the arrow 111 Fig. 2, which will cause the pipe to be wedged against the teeth and the teeth to blte lnto the pipe and thus the wrench and be caused to turn together. A reverse movement of the wrench will release the pipe from its engagement therewith.

In Fig. 3I illustrate a modified form of my lnvention, wherein the extremity of the hook 12 is provided with two sets of teeth 14. and 14, the teeth 14 being adapted to embrace another sized pipe from that acted upon by the teeth 14. Otherwise than this, the construction illustrated in Fig. 3 is exactly the same as that illustrated in Fig. 1. I do not wish to be limited to a pair of these teeth 14 and 14 as still more teeth may be placed upon the end of the hook. Each of these sets of teeth is adapted to engage two sizes of pipe and thus it will be obvious that "a wrench constructed in accordance with Fig. 3, but having more than two sets of teeth, may be adapted to engage pipes having a large range in diameter.

In Fig. 4 I show still another form of my invention wherein the shank 10 has the same form as hereinbefore described, and is provided with the bill 12 of the form previously illustrated, and having teeth 14".

B denotes a bushing adapted to be de tachably engaged with the working face of the shank of the bill 14, and each side margin of said bushing B is provided with a wing or flange 16 to overlay a side face of said shank, so that the bushing is effectively maintained in applied position. The bushing is longitudinally curved to closely conform to the curvature of the working face of the bill 12, and this bushing B may be quickly applied when it is desired to employ the wrench in connection with pipes of different sizes.

In practice it is preferred that a wrench constructed in accordance with an embodiment of my invention be of soft steel, so that there will be no digging of the wrench into the pipe or other work with which it is engaged.

From the foregoing description, it is thought to be obvious that a pipe wrench constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as 'limiting-myself to the precise arrangement and formation of then curvedfaround and downward in the opposite direction" to form a hook and reduced in thickness at the extremity of the hook, the extremity of the hook extending inward toward the shank and being formed to provide a toothed biting edge, the teeth extending toward the inner face of the shank. f s V 3; A pipe wrench comprising a single shank formed at its extremity with a hook,

the extremity of the hook facing toward the inner face of the shank, the extremity of said hook onthe inner face thereof being formed to provide a plurality of series of cutting teeth each projecting from the inner face of the hook a different distance from the teeth of any other series and facing toward the inner face of the hook.

4. A pipe wrench comprising a shank bent at one end to form a hook, the extremity of the hook extending inwardly toward the shank and being formed'with a biting edge, and a bushing adapted to be disposed upon the inner face of the shank opposite the hook and formed with means to embrace the shank and hold the bushin in place.

5. A pipe wrench comprising a shanL bent at one end to form a hook, the extremity of the hook extending inwardly toward the shank and being formed with a biting edge, and a bushing adapted to be disposed against the inner face of the shank opposite the hook, said bushing extending along the inner face of the shankand at its extremity abutting a ainst the inner face of the hookshaped portion and the bushing being provided with two ears embracing the shank.

In testimony whereof I hereunto affix my signature.

EZRA BOWVEN.

Images