Engineers wrench

Details Engineers wrench Engineers wrench

1997-10-27

1999-11-30

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

81186, B25B 1302

Patent

active

059922710

ABSTRACT:
An engineers wrench has at least one open end forming a mouth which defines a mouth opening. The mouth opening is laterally delimited by a pair of mutually oppositely disposed lateral, surfaces which define a wrench width. At least inwardly disposed sections of the lateral surfaces have a slight convex-cylindrical curvature defined by a finite radius of curvature so that the mouth opening widens in the direction towards respective outer edges to a mouth width which exceeds the wrench width. The mouth opening is inwardly delimited by a mouth base; two substantially flat surfaces are interconnected at the mouth base as well as connected to associated ones of the lateral surfaces through respective connecting surfaces. The connecting surfaces have a concave-cylindrical curvature defined by a smaller radius of curvature than the finite radius of curvature of the convex-cylindrically curved lateral surfaces.

REFERENCES:
patent: 3242775 (1966-03-01), Hinkle
patent: 3785226 (1974-01-01), Ward
patent: 3921476 (1975-11-01), Evans
patent: 4765211 (1988-08-01), Colvin
patent: 5381710 (1995-01-01), Baker
patent: 5396820 (1995-03-01), Baker
patent: 5406868 (1995-04-01), Foster

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