US1193163A - Webitch - Google Patents

Description

J. R. LONG.

WHENCIL APPLICATION FILED SEPT. 20. 1915.

Patented An 1, 1916.

IN V EN TOR.

W I TNESS %o. %M u A TTORNE YS.

JOHN It. LONG, 013 AZIKBOIN, OHIO.

WRENCH.

masses.

Specification of Letters Patent.

Patented Aug. 11, 191 6 A lication filed September 20, 1915. Serial No. 51 59%.

To all whom it may concern:

Be it known that T, JOHN R. Lone, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, hare invented, certain new and useful Tmprovements in v Wrenches, of which the following is a specification.

This invention relates to improvements in wrenches, and the improvements comprise the construction and arrangement of parts substantially as herein shown and described and more particularly pointed out in the claim.

The object of the improvement is to provide a wrench having a tilting jaw adapted to operate in the same manner as in sevoral well known forms of wrenches, and this improved Wrench is particularly constructed to provide a solid jaw shank reinforced by side ribs and.,devoid of weakening screwthreads. A simple and very convenient way of adjustment is also provided by a turning movement of the handle, and the adjustment is positively limited so that the wrench can not be applied on work beyond its given capacity and strength.

Other objects are embodied also in the details of construction, all as hereinafter set forth.

In the accompanying drawing, Figure 1 is a side view and Fig. 2 a bottom of the wrench. Fig. 3 is a view corresponding to Fig. 1, but partly in section. Figs. 4 and 5 are cross sections on lines e-a, and 55, respectively, of Fig. 3.

The wrench comprises a solid tilting aw having a shank 3 pivotally mounted on a pin a secured between two cars 5 integral with and projecting forwardly at one side of a cylindrical sleeve 6. This sleeve is provided with a longitudinal bore 7 which is smooth for the greater part except at its front end where an internal screw-thread 8 is formed to engage the external screwthread 9 on the round stem 10 of the handle 11, and an inner knurled jaw 12 of diskshape having a reduced extension 18 is pinned or otherwise fixed within the outer recessed end of said stem 10 opposite the serrated face 1 1 of the outer jaw 2. A heavy flange 15 extends down each side of the body of the jaw 2 around the bend and rearwardly along the shank 3 approximately one-half the length thereof to add strength thereto, especially at the bend. The rear end of the shank is slightly enlarged and provided with a flat inner face 16 adapted to engage the iiat face 17 on the sleeve 6 at the bottom of the recess 18 between the ears 5, and a coiled spring 19 is confined within a hole 21 drilled into the inner shank face 16 near the end thereof and bears against the sleeve 6 to cause the outer jaw 2 to tilt more or less dependent upon the position of jaw 12 which is adapted to be engaged at its front edge by the shank 3, see Fig. 1. A forward 5 rowing movement of the handle causes jaw to ride longitudinally in bearing engagement with the shank, in this way forcing the shank to one side against the slight resistance of the spring 19. The slight friction holds the parts in their adjusted positions, and the adjustment of the jaw is accomplished by turning the handle 11 within sleeve 6 to produce a forward or backward movement of jaw 12 relatively to jaw 2. For example, when the wrench is placed in position upon the pipe, the handle is screwed forward to press the inner jaw 12 against the pipe or work until the outer aw 2 is forced to tilt against the action of spring 19. Then as the wrench is worked to turn the pipe the serrated jaw 2 will keep its teeth against the pipe without any other assistance during gripping or releasing operations. Crushing of the pipe is prevented by shank 3 engaging the edge of the inner jaw 12, and the spring 19 makes gripping of the work easy. A sensitive grip is afforded by projecting the ears 5 and pivot pin 4: forwardly at the front end of sleeve 6, an arrangement which permits jaws 12 to retire beneath the pivot pin.

The handle stem is provided preferably with square threads and the sleeve 6 is threaded at the front end as shown and the balance of the sleeve oaenin is blank or smooth to protect the threaded end 9 of the handle from injury or damage, as well as to increase the strength of the device. The fact that the outer jaw 2 and its shank is devoid of screw-threads materially strengthens the wrench so that it is actually much stronger than other wrenches in use of the tilting jaw type, and the simplicity of this improved wrench makes it very cheap to manufacture and of great practical utility, while at the same time it is exceedingly convenient to apply and manipulate. Moreover the jaw 12 being in the form of a disk and larger in diameter than the screw stem 10 provides a definite stop tltl for the inward movement of said jaw, and

the capacity of the wrench is limited to a predetermined size of pipe, a feature which absolutely prevents the wrench from being abused and strained or the parts sprung out of, place.

hand through the handle, bothin applying 7 faced jaw removably fixed'therein, in com- The wrench is easily manipulated by one bination with an internally threaded sleeve in which said end is engaged having a pair of ears on its back and a straight flat surface between said ears, an outer jaw having a flat engaging face and a shank pivoted between said ears provided with a straight fiat bottom adapted to rest on the corresponding surface between said ears, the said opposed flat surfaces being behind said pivot, whereby when the jaws are brought into action they are kept parallel.

In testimony whereof I ailix my signature in presence of two witnesses.

JOHN R. LONG. Witnesses Gno. E. Knrcnnn, M. SCHWAN.

Copies of this patent may be obtained for five-cents each, by addressingthe Commissioner of Patents,

' Washington; D. 0;

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