Tools – Wrench – screwdriver – or driver therefor – Jaw faces
Patent
1994-04-07
1996-01-09
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Jaw faces
81436, 811211, B25B 1300
Patent
active
054819482
ABSTRACT:
Each side of an active head, having a roughly polygonal cross-section, of a tool includes two half-sides, active zones of which are asymmetrical with respect to each other relative to the axial mid-plane such side, so as to apply, to the driven profile, a greater torque in one direction compared to the other for a given stress experienced by the tool.
REFERENCES:
patent: 3903764 (1975-09-01), Andersen
patent: 3908488 (1975-09-01), Andersen
patent: 4930378 (1990-06-01), Colvin
Facom
Smith James G.
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