Wrench and method of making the same

Details Wrench and method of making the same Wrench and method of making the same

1976-06-28

1977-12-06

Stallard, W.

Metal treatment

Compositions

Heat treating

72326, 76114, 113116BB, 148 12E, 148131, C21D 106, C21D 900

Patent

active

040615073

ABSTRACT:
An improved high strength wrench is stamped from a strip of a heat hardenable and relatively strong metal, such as stainless steel. The wrench is of the open-end type and has jaws with operating surfaces which, due to the hardness of the metal from which the wrench is stamped, maintain their original configuration even after the wrench has been utilized for an extended period of time. To promote the accurate formation of the operating surfaces of the jaws of the wrench, they are initially formed to a size which approximates their final size and configuration. The operating surfaces are then accurately trimmed to their final size and configuration by a shaving operation. During this shaving operation, a section of metal extending between the outer ends of the jaws of the wrench holds the jaws of the wrench against movement relative to each other. The section of metal extending between the outer ends of the jaws of the wrench is sheared off to provide an open-ended wrench having jaws with accurately formed operating surfaces to engage a nut or other article.

REFERENCES:
patent: 3823596 (1974-07-01), Elder et al.
patent: 3852870 (1974-12-01), Elliot

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