US1354552A - Wrench - Google Patents

Description

E. H. HART.

WRENCH.

APPLICATION FILED MAY 20. 1920.

1,354,552. Patented (m. 1920.

EMIL H. HART, 01? LITTLE ROCK, ARKANSAS.

WRENCH.

Specification of Letters Patent.

Patented oct. 5, 1920.

Application filed May 29, 1820. Serial No. 382,815.

To all whom it may concern. 7

Be it known that I, EMIL H. HART, a citizen of the United States, residing at Little Rock, in the county of Pulaski and State of Arkansas, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

This invention relates to wrenches and particularly to the type of sliding jaws with a handle lever grip for opening and closing the jaw members wnereby the jaws are adapted to grip various sized objects by operating the handle.

An object of the invention is to simplify the construction and provide a wrench which will be durable and effective in operation.

Further objects and details of the invention will appear as described in connection with the accompanying drawings and here inafter set forth and claimed.

Referring to the drawings forming a part of this specification, like characters of reference designate corresponding parts throughout the several views, in which Figure 1 is a plan view of the wrench showing the jaws open to their fullest eX- tent, part of one of the jaws being broken,

Fig. 2 is a plan view of the reverse side of the wrench showing the jaws closed,

Fig. 3 is a fragmentary plan view similar to Fig. 1 showing the jaws half way open in a gripping position, and

Fig. 4 is a view of the jaw members in perspective.

The wrench as shown in the drawings comprises a handle, A, two jaw members, B and C, and a pivot pin, D.

The jaw members, A and B, comprise j aws, 10 and 11, and shank portions, 12 and 13. As best shown in Fig. 4 the body, 13, of jaw member, A, is undercut or grooved on each side at 1 1 for receiving flanges or projections 15 on the aw member, B. The end of the body 13, remote from the jaw portion is formed with an operating or cam surface, 16, and projection, 17. An aperture, 18, is formed in the body 12 for receiving the pivot member, D, which may be a screw or rivet. The handle, A, is perforated for receiving the pivot, D, and has a jaw operating end, 20, and projection, 21, which are adapted to cooperate with the surface, 16, of the aw shank 13. It is cut away at 22 so as to cooperate with the projection 17 on the aw shank for limiting the opening between the jaws B and C.

In assembling the wrench the jaw members are put together with the shank, 13, within the shank, 12, and'the grooves, 11, engaged b the flanges, 15, as they slidingly engage each other. The end, 20, of the handle, A, is then positioned between the shank portion of jaw, B, in engagement with the surface 16 of the jaw member, C, and with its aperture, 19, in alinement with aperture 18. The pivot pin, D, is then inserted and fastened in place and the wrench is ready for use. It will be noted that the projection, 17, pre vents the jaws from coming apart, and its cooperation w'th the portion 22, of the handle, limits the extent of the opening of the jaws as shown in Fig. 1, with a nut, N, between them. VJhen smaller objects are to be gripped the jaws are moved toward each other by rotation of the handle (counterclock-wise, Figs. 1 and 3), and when small objects are to be gripped the leverage is increased, being shifted from the end, 20, with surface 16 to the projection 21 therewith (see Fig. 3) until the jaws are entirely closed.

I do not wish to limit myself to any specific constructions as described in this specification for the purpose of giving examples or illustrations of my invention, for it is obvious that various changes in the details may be resorted to without departing from the spirit and scope of the invention, which is set forth in the following claims:

1. A wrench comprising two jaw members slidingly cooperating with each other, a stock pivoted to one of said jaw members, said stock terminating in a handle, an extension of the stock on the opposite side of the pivot from the handle adapted to cooperate alone with the other aw member when the jaws are fully open, and a projection on the stock on the same side of the pivot as the handle for cotiperating with said second jaw member after the jaws have been partially closed.

2. A wrench comprising two jaw members each bearing a shank, the shank on one jaw member adapted to slidingly engage within the shank of the other jaw member, a handle pivoted within the shank of the second aw member having an extension adapted to engage the shank of the first aw member, and a projection of the shank on the first jaw member adapted to engage said extension of the handle on one side thereof for limiting "operating surface on said first shank, handle pivoted within said second shank having an extension adapted to cooperate with the cam or operating surface of the first shank until the jaws have been partially closed, and a projection on the side of the handle adapted to cooperate with the side of the first jaw member thereafter.

4; A Wrench comprising a jaw member havin extendin sha'nk members a hanole c b r 7 pivoted in said shank memoers, a second aw member bearing a shank and slidingly mounted in the shanks of the first jaw memher, a cam surface on the shank of said second member and having a projection thereon for limiting the opening of the jaws, extension on said handle adapted to cooperate withsaid cam surface for partially clos ng the jaws, and a pro ection on the side of the handle adapted to cooperate with the side of said second jaw member thereafter. i V

In testimony whereof I aflix my signature.

EMI L H. 'HART.

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