Locking screwdriver

Details Locking screwdriver Locking screwdriver

2006-02-14

2006-02-14

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S456000

Reexamination Certificate

active

06997086

ABSTRACT:
A locking screwdriver which engages and locks to the head of a screw preventing unseating of the screwdriver from the screw during screw removal and firmly holding and guiding self-tapping screws during their placement.

REFERENCES:
patent: 2399138 (1946-04-01), Nygaard
patent: 2406952 (1946-09-01), Josepho
patent: 2576742 (1951-11-01), Wolny
patent: 3735650 (1973-05-01), Weng, Jr.
patent: 3901298 (1975-08-01), Eby
patent: 4204308 (1980-05-01), Marling
patent: 4339971 (1982-07-01), Zatorre
patent: 4389913 (1983-06-01), Drouin
patent: 4507837 (1985-04-01), Hinkle
patent: 5056387 (1991-10-01), Cook
patent: 6082233 (2000-07-01), Han
patent: 6128982 (2000-10-01), Gwin, Sr.
patent: 6244141 (2001-06-01), Han
patent: 6267025 (2001-07-01), Sand
patent: 6701812 (2004-03-01), Sawamura
patent: 6857343 (2005-02-01), Easterbrooks et al.

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