Combination drill and screwdriver

Details Combination drill and screwdriver Combination drill and screwdriver

1988-07-18

1989-08-01

Smith, James G.

Compound tools

With screwdriver

408224, B25B 1500

Patent

active

048521965

ABSTRACT:
A combination drill and screwdriver device for use in forming holes in wallboard material or the like and for driving screws. A Phillips head screwdriver bit is modified for use in forming pilot holes for screw anchors and for a counterbore. A sleeve surrounding the bit provides a drill stop when drilling holes for screw anchors. The sleeve may be pushed through the pilot hole to position a counterbore used for forming larger holes.

REFERENCES:
patent: 2978846 (1961-04-01), Barron
patent: 3207196 (1965-09-01), Stillwagon
patent: 3763510 (1973-10-01), Graham
patent: 3869741 (1975-03-01), Logan
patent: 4079766 (1978-03-01), Conley et al.
patent: 4092753 (1978-06-01), Fuhrmann
patent: 4093395 (1978-06-01), Luebbert et al.
patent: 4505626 (1985-03-01), Benhase
patent: 4512691 (1985-04-01), Dicke
patent: 4512693 (1985-04-01), Swanson
patent: 4710075 (1987-12-01), Davison

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