Screw-holding screwdriver

Details Screw-holding screwdriver Screw-holding screwdriver

1990-10-15

1991-10-15

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

811772, B25B 2308

Patent

active

050563874

ABSTRACT:
The screw-holding screwdriver has a sleeve threadedly attached to its shank. A chuck on the end of the sleeve has a slot in the side to receive a screw head and shank. By screwing the sleeve up on the shank, the screwdriver bit engages the screw head and clamps the screw head in the chuck for driving the screw. When partially inserted, the sleeve is rotated on the shank to release the screw to permit removal of the chuck from the screw. In this way, the screw is firmly retained while driving.

REFERENCES:
patent: 2756791 (1956-07-01), Ferrara
patent: 3738768 (1973-06-01), Kuhn
patent: 4581962 (1986-04-01), Marbourg
patent: 4827812 (1989-05-01), Markovetz

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