Bi-sectional wrench

Details Bi-sectional wrench Bi-sectional wrench

2007-12-04

2007-12-04

Grant, Alvin J. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle or shank

C081S177700, C081S177800, C081S063200

Reexamination Certificate

active

11696718

ABSTRACT:
A wrench includes a lever with teeth formed on the wall of a space defined therein. A handle includes teeth formed on the wall of a space defined therein. A toothed wheel is movable in the spaces between a first position where the teeth of the toothed wheel are engaged with the teeth of the lever and handle and a second position where the teeth of the toothed wheel are only engaged with the teeth of one of the lever and handle. A switch is operable for moving the toothed wheel between the positions. A boss is formed on the handle. A groove is defined in the switch. The arrival at the first position is signaled by the contact of the boss with an end of the groove while the arrival at the second position is signaled by the contact of the boss with another end of the groove.

REFERENCES:
patent: 4406186 (1983-09-01), Gummow
patent: 5419221 (1995-05-01), Cole
patent: 5535648 (1996-07-01), Braun et al.
patent: 5941141 (1999-08-01), Whitley
patent: 6000299 (1999-12-01), Cole
patent: 6101907 (2000-08-01), McGovern et al.
patent: 6161982 (2000-12-01), Cole
patent: 6216565 (2001-04-01), McCann
patent: 6840141 (2005-01-01), Cole
patent: 6928904 (2005-08-01), Hsien

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