Wrench having a socket with circumferentially spaced recesses

Details Wrench having a socket with circumferentially spaced recesses Wrench having a socket with circumferentially spaced recesses

1998-12-21

2000-06-27

Scherbel, David A.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

81186, B25B 1306

Patent

active

06079299&

ABSTRACT:
A wrench includes an opening having a side wall defined by circumferentially alternating contact surfaces and recesses. Each recess includes a concave bottom surface and a pair of concave edge surfaces extending from respective ends of the bottom surface. The bottom surface has a radius of curvature larger than a radius of curvature of the edge surfaces and smaller than a distance from a center of the opening to a midpoint of the bottom surface, whereby a thickness of the wrench increases progressively on opposite sides of a midpoint of the bottom surface. Imaginary extensions of the contact surfaces disposed at opposite ends of each recess intersect one another substantially at the midpoint of the bottom surface.

REFERENCES:
patent: 3125910 (1964-03-01), Kavalar
patent: 3273430 (1966-09-01), Knudsen et al.
patent: 4512220 (1985-04-01), Barnhill, III et al.
patent: 4581957 (1986-04-01), Dossier
patent: 4882957 (1989-11-01), Wright et al.
patent: 5219392 (1993-06-01), Ruzicka et al.
patent: 5279190 (1994-01-01), Goss et al.

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