Driver bit for a recessed screw

Details Driver bit for a recessed screw Driver bit for a recessed screw

1995-02-28

1996-04-23

Kisliuk, Bruce M.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81436, B25B 1500, B25B 2300

Patent

active

055093345

ABSTRACT:
A driver bit adapted to engage in a recess of a recessed screw which recess is defined as a coaxial superimposition of two equilaterally triangular and cylindrical recesses each having arcuate vertices and arranged with a phase shift of 60.degree. about a center axis of the recessed screw to provide six engagable grooves and six driven vanes. The driver bit includes six driving vanes and six valleys, with each driving vane being shaped in conformity with each groove in the recess of the recessed screw, and with each valley being interposed between adjacent driving vanes and shaped in conformity with each driven vane in the recess of the recessed screw.

REFERENCES:
patent: 2777353 (1952-10-01), Willis
patent: 3584667 (1971-06-01), Reiland
patent: 4269246 (1981-05-01), Larson et al.
patent: 4646594 (1987-03-01), Tien
patent: 5219253 (1993-06-01), Shinjo
patent: 5435680 (1995-07-01), Schuster

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