Work saver for an electric drill

Details Work saver for an electric drill Work saver for an electric drill

2006-05-30

2006-05-30

Ashley, Boyer D. (Department: 3722)

Cutting by use of rotating axially moving tool

Processes

Bit detachable

C408S092000, C408S111000, C408S129000, C173S147000

Reexamination Certificate

active

07052216

ABSTRACT:
A T-bracket having a pair of spaced apart arms support a housing containing a sprocket wheel and a shaft to turn the sprocket. A handle attached to one end of the shaft turns the sprocket to tighten a chain turning on the sprocket teeth. A flexible wire rod is welded to the T-bracket and is juxtaposed around a rear end of a power drill. The chain is looped around a work piece and attached to a side of the drill opposite from the T-bracket. The handle is turned to tighten the chain and exert force on a drill bit being driven by the power drill.

REFERENCES:
patent: 683794 (1901-10-01), Politsch
patent: 2362929 (1944-11-01), Richards
patent: 2465729 (1949-03-01), Johnson et al.
patent: 2821872 (1958-02-01), Salfer
patent: 2947205 (1960-08-01), Wilson
patent: 3741670 (1973-06-01), Wood
patent: 4094612 (1978-06-01), Krieg
patent: 5890851 (1999-04-01), Hamilton
patent: 2004/0202516 (2004-10-01), Lanser
patent: 3927971 (1991-02-01), None

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