Screw driving device

Details Screw driving device Screw driving device

1986-12-08

1989-10-17

Meislin, Debra

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

B25B 1502

Patent

active

048739006

ABSTRACT:
An improved device is disclosed for driving slotted head fasteners. The invention involves the use of a straight bit with parallel opposing surfaces to apply torque to the fastener slot over an increased area and reduce the tendency of the bit to slip out of the slot.

REFERENCES:
patent: D112592 (1938-12-01), Velepec
patent: D229475 (1973-12-01), Uboldi
patent: 1479506 (1924-01-01), Kellemen
patent: 1787087 (1930-12-01), Robertson
patent: 3405748 (1968-10-01), Sorteberg
patent: 3897812 (1975-08-01), Arnn
patent: 3923088 (1975-12-01), Arnn
patent: 4105056 (1978-08-01), Arnn
patent: 4311071 (1982-01-01), Bassell
patent: 4339971 (1982-07-01), Zatorre
American Machinist, 8/29/1946, p. 126.

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