US1077591A - Pipe-wrench. - Google Patents

Description

W. CAMERON.

PIPE WRENCH. APPLICATION FILED mumz, 1913.

1 ,077,59 1 Patented Nov. 4, 1913.

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WILLIAM CAMERON, OF TOLEDO, OHIO.

PIPE-WRENCH.

Specification of Letters Patent.

Patented Nov. at, 1913.

Application filed March 22, 1913. Serial No. 756,111.

To all whom it may concern:

Be it known that I, WILLIAM CAMERON, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Pipe-Wrench; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a partof this specification.

My invention relates to wrenches of the class in which a strap is employed as a gripping element so that nickel-plated, brass or other highly-polished pipes can be gripped without danger of being marred by the wrench.

The object of my invention is the provision of a wrench of this type, which is simple, strong and economical in its construction, composed of a few parts, and has the strap engaging parts thereof so arranged that when in use such parts cooperate to securely hold the strap, and which eliminates the objectionable practice now commonly employed of sewing or riveting the strap to one of such parts.

The operation, construction and arrangement of the parts of the invention are fully described in the following specification and a preferred embodiment thereof is illustrated in the accompanying drawings, in which,

Figure l is a top plan View of the wrench in engagement with a pipe. Fig. 2 is a side view thereof with the forward end of the wrench in longitudinal section, and Fig. 3 is a side view of the wrench with the jaws partly open.

Referring to the drawings, 1 designates the handle of the wrench, the forward end of which is forked to provide two spaced longitudinally-extending arms 2, 2, the outer ends of which are connected by the integral cross-bar 3. Pivoted between the arms 2, 2, as at 4:, is the movable jaw 5, which is provided near its free end with a transverse opening 6, and has such end extended in position to adapt it to cooperate with the cross-bar 3, as hereinafter described.

7 designates the strap or flexible pipegripping element, one end of which is looped through the opening 6 in the jaw 5 from the inner side thereof and securely held against withdrawal therefrom by a cam-bar 8, which is forced Within such loop and opening and pivotally secured therein by a screw 9. The

major portion of the strap on leaving the opening 6 passes outwardly between the bar 3 and the free end of the jaw 5, thence around the pipe 10 on which it acts and back over the inner face of the bar 3, the surface of which is corrugated to assist in preventing a slipping of the strap in contact therewith, and thence has its free end projected loosely between the arms 2, 2 of the handle.

When the wrench is placed in the position indicated in Fig. 2 relative to the pipe 10 to be turned and a turning stress is applied to the handle in the direction indicated by the arrow in such figure, the bar 3 acts as the fulcrum for the handle and strain on the strap is applied mainly to the upper half of the loop which surrounds the pipe and has its end attached to the jaw 5. The jaw 5, however, is relieved very materially of rel the strain applied to the strap by reason of 8 tj the free end of such jaw being drawn toward the bar 3 whereby such jaw and bar cooperate to firmly grip the two thicknesses of the strap disposed therebetween, which gripping is augmented by resiningthe strap.

It 1s apparent to persons familiar with the use of this class of tools that I have provided a smooth pipe wrench which is simple and eiiicient in its operation and construction, and which obviates the objections inci-. dent to the use of the wrenches of this class heretofore employed, in that it is stronger, has a more eflicient gripping action, the strap is not liable to become disconnected from the jaw 5 due to strain, as is frequently the case with straps that are secured to the metal parts by sewing or riveting and the jaw 5 is relieved from the strain to a considerable extent by the -cooperating gripping action of the bar 3 and jaw 5. I

I wish it understood that my invention is not limited to any specific arrangement or construction of the parts except in so far as such limitations are specified in the claim.

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

A pipe-wrench comprising a handle having an end forked and the furcations thereof connected at their outer ends by a cross-bar "col having a serrated surface, a jaw pivoted to opening and cooperating with the jaw to said furcations and having a transverse i attach the strap thereto. opening, a strap having an end portion In testimony whereof, I have hereunto looped through the opening in said jaw and signed my name to this specification in the a portion looped outwardly between said presence of two subscribing witnesses. cross-bar and the free end of said jaw, said bar and jaw cooperating to firmly grip said WILLIAM CAMERON outwardly looped portion of the strap when i Witnesses: strain is applied thereto, and a rotatable S. T. KLo'rz, cam-bar removably secured within said F. E. AUL.

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

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