Spanner

Details Spanner Spanner

1995-08-10

1997-04-15

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 60, 192 45, B25B 1300

Patent

active

056198906

ABSTRACT:
A improved spanner includes a lever handle, coaxial interior and exterior rings, a plurality of columned cams with non-circular cross section retained in an annular space formed between both rings, an annular spring for rolling each columned cam on the outer peripheral surface of the interior ring and wedging the non-circular surface of each columned cam into the inner surface of the exterior ring, and a shaft, for mounting an adapter which engages a bolt head, nut, or the like, coaxially mounted in the interior ring. The shaft is movable in the direction of an axis of the interior ring.

REFERENCES:
patent: 4408504 (1983-10-01), Dobosh
patent: 4939961 (1990-07-01), Lee
patent: 5461950 (1995-10-01), Iwinski

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