US1796888A - Plier wrench - Google Patents

Description

March 17, 1931. o c DAVls 1,796,888

FLIER WRENCH Filed Oct. 1, 1928 Patented Mar. 17, 1931 UNITED STATES ORIN C. DAVIS, F MANISTEE, MICHIGAN rmnn WRENCH Application filed October 1, 1928. -Seria1 No. 309,379.

One of the objects of this invention is to provide a wrench constructed like a pair of pliers and capable of holding with great strength, a nut or like object which is to be rotated, the construction of the jaws of the wrench being such that many holds may be secured on a nut, and, specifically, whereby twelve holds may be secured on a hexagonal nut, in a single complete rotation of the nut,

the tool, thus, being peculiarly useful in places wherein the wrench can be swung through a small are only. Another object of the invention is so to construct a device of the class described that the parts of it will be prevented from being strained or broken off.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in side elevation, a wrench constructed in accordance with the invention;

Figure 2 is an elevation wherein the wrench is viewed edgewise;

Figure 3 is a plan of the second lever;

Figure 4 is a plan of the first lever;

Figure 5 is a fragmental elevation showing a slight modification, or reversal of parts.

The wrench forming the subject matter of this application comprises a main member 1, the intermediate portion of which is denoted by the numeral 2. At one end, the main member 1 has a handle 3. At its opposite end, the main member 1 has a jaw 4. A first lever 15 is fulcrumed, intermediate its ends, at 16, on the main member 1. The first lever 15 is provided at its outer end with a jaw 17. The jaw 17 of the first lever 15 cooperates with the aw 4 of the main mem her 1. The first lever 15 is provided at its lnner end with an arm 18. The numeral 5 designates a second lever. A pivot element 6 connects the intermediate portion of the second lever 5 with the intermediate portion 2 of the main member 1. There is a handle 7 at the outer end of the second lever 5. The second lever 5 has an arm 8 at its inner end. The handle 7 of the second lever 5 cooperates with the handle 3 of the main member 1. One of the arms, to wit, the arm 8, is provided at its inner end with fingers 9 and 10. The fingers 9 and 10 define a notch 11. The other of the arms, to wit, the arm 18, terminates in a single rounded projection 19. The projection 19 is received in the notch 11. The arm 18 has a reduced neck 20 defining opposed concaved recesses 21. The recesses 21 receive the ends of the fingers 9 and '10. The finger 9 is the finger which transmits the thrust to the rounded projection 19 when thejaws are closed together. On that account, the finger 9 is made wider and stronger than the finger 10 which 7 5 is a mere guide or retaining finger for keepmg the projection 19 in place in the notch 11.

The second lever 5 has spaced shoulders 12 and 14. The shoulders 12 and 14 are disposed adjacent to the pivot element 6: The main 8 S0 member 1 has a lug 22. The lug 22 is adapted to engage either of the shoulders 12-14 of the second lever 5, thereby to limit the swinging movement of the second lever with respect to the first lever 15, and to prevent a binding of the fingers 91() against the neck 20, and a breaking of either of the fingers 9'10 or the neck 20.

The jaws 4-17 have straight inner surfaces 23 provided intermediate their ends 99 with oppositely extended angular notches 24 so shaped as to fit a hexagonal nut at its'corners, the notches 24 cooperating with the straight inner surfaces 23 of the jaws to give the aws twelve gripping holds on a hexagonal nut during a single rotation of the nut.

The projection 19, thenotch 11, the fingers 9 and 10,- and the reduced neck 21 constitute whatmight be'called a semi ball andsocket joint, and-the device is' tobe distinguished 1N clearly from a structure on which a rack and pinion, or an equivalent structure forms the operative connection between the pivoted handle and the swinging jaw-carrying lever.

It is not necessary that the rounded projection 19 form part of the lever 15. Thus, in Figure 5, a reversal of parts has been effected, the rounded projection 1960 being on the second lever, and the fingers 10a and 9a being on the first lever. In this form of the invention, the finger 10a is thicker and stronger than the finger 9a, because the finger 10a is the one that receives the thrust when the jaws of the wrench are closed together.

The handle 7 is much longerthan the arm 8, and the arm 8 is considerably shorter than the arm 18, the arm 18 being appreciably longer than-the jaw 17. The result is that with a small pressure exerted on the handle 7, the nut can be gripped with great force between the aws 4L and 17.

Owing to the specific construction of the jaws 4 and 17 whereby twelve holds can be secured on a hexagonal nut, in one complete rotation of the nut, the wrench can be used to advantage in close quarters, and with a view to facilitating the use of the wrench in places where there is not much room to operate it, the second lever 15 and the main member 1 are offset, as shown at 25, so as to bring the jaws 4 and 17 into the same plane as disclosed in Figure 2 of the drawings.

WVhat is claimed is A wrench comprising a main member provided at one end with a handle and at its opposite end with a jaw,;a first lever fulcrumed intermediate its ends on the main member and provided at its outer end with a jaw which cooperates with the jaw of the main member, the first-lever being provided at its inner end with an arm, a second lever,

ORIN C. DAVIS.

a pivot element connecting the intermediate portion-of the second lever with the intermediate portion of the main memberand forming a handle at the outer end of the second lever and an arm at the inner end of the second lever, the handle of the second lever cooperating with the handle of the main member, one of the arms being provided on its inner end with fingers having rounded: ends, the fingers defining a notch, the other of the arms terminating in a single rounded projection received in the notch, and having :a reduced neck defining opposed concaved recesses which cooperate continuously with the rounded ends of the fingers duringthe opening and closing of the -wrench, the finger which transmits the thrust tothe rounded projection when the jaws are closed together beingwider thanthe other; finger, the second lever having spaced shoulders located adjacent to the pivot element, the main-member being provided with a laterally projectingreinforcing lug adapted to engage-either of the shoulders ofthe second lever, therebytoilirnit-

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