Tools – Wrench – screwdriver – or driver therefor – Jaw faces
Patent
1996-09-03
1999-01-19
Meislin, D.S.
Tools
Wrench, screwdriver, or driver therefor
Jaw faces
81119, 811211, B25B 1306, B25B 1308
Patent
active
058603395
ABSTRACT:
A wrenching member includes at least two spaced-apart and substantially oppositely facing drive surfaces, each of which has a roughened region and an unroughened region thereon, with the roughened region being disposed adjacent to one end of one of the drive surfaces and adjacent to the other end of the other drive surface so as to afford a differential driving arrangement which exerts a greater frictional wrenching force in one direction than in the opposite direction.
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Eberhage Mark
Hoff Jeffrey H.
Mikic, deceased Frank
Meislin D.S.
Snap-on Technologies, Inc.
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