Back-side taper wedging drive system

Details Back-side taper wedging drive system Back-side taper wedging drive system

1993-10-01

1995-10-31

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

411404, B25B 1500

Patent

active

054619521

ABSTRACT:
A driver assembly for driving fasteners into a workpiece comprises a multilobular fastener engaging portion for engagement in a complementary multilobular socket or recess on a fastener. Each lobe is bounded on opposite sides by a flute, and each lobe includes a driving side wall and a trailing tapered side wall. The driving side walls are adapted to contact the complementary lobular portions of the fastener for applying torque to the fastener, while the trailing tapered side wall is aligned to contact the complementary lobular portion in wedged engagement at a point when the fastener is applied to the fastener portion. A fastener socket is also provided having a driven side wall and a trailing tapered side wall, which is constructed substantially similarly to the tapered side wall of the drive bit and which provides similar attributes.

REFERENCES:
patent: 2592462 (1952-04-01), Phipard
patent: 2601453 (1952-06-01), Phipard
patent: 3028781 (1962-04-01), Muenchinger
patent: 3584667 (1971-06-01), Reiland
patent: 4228723 (1980-10-01), Cunningham
patent: 4269246 (1981-05-01), Larson et al.
patent: 4970922 (1990-11-01), Krivec
patent: 5019080 (1991-05-01), Hemer

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