Auxiliary chuck and screwdriver for electric drills

Details Auxiliary chuck and screwdriver for electric drills Auxiliary chuck and screwdriver for electric drills

1995-10-11

1997-07-29

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool-support

With tool-retaining means

7158, 7165, 81439, 279 14, 279145, 408239A, B23B 5108

Patent

active

056516479

ABSTRACT:
The combination tool of this invention positions a screwdriver in the chuck of an electric drill and frictionally fastens an auxiliary chuck to the portion of the screwdriver extending from the electric drill. A drill bit is placed in the auxiliary chuck and a pilot hole is drilled. The auxiliary chuck is then pulled off of the screwdriver and the exposed screwdriver is used to thread a screw in the pilot hole. The auxiliary chuck with its drill bit may then be pushed back on the screwdriver to drill another pilot hole, and the process repeated as desired.

REFERENCES:
patent: 3484114 (1969-12-01), Rodin
patent: 3932904 (1976-01-01), Nilsson et al.
patent: 3973784 (1976-08-01), Smith
patent: 4796319 (1989-01-01), Taft
patent: 5110145 (1992-05-01), Stewart
patent: 5129118 (1992-07-01), Walmesley
patent: 5191666 (1993-03-01), Corbin
patent: 5230261 (1993-07-01), Akazawa et al.

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