Bi-sectional wrench

Details Bi-sectional wrench Bi-sectional wrench

2007-07-24

2007-07-24

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle or shank

C081S177800

Reexamination Certificate

active

11409655

ABSTRACT:
A bi-sectional wrench includes a lever, a handle and a toothed wheel. The lever includes a space defined therein and a plurality of teeth formed on the wall of the space. The handle includes a space defined therein and a plurality of teeth formed on the wall of the space. The toothed wheel is movable in the spaces between a first position and a second position. The teeth of the toothed wheel are engaged with the teeth of the handle and the teeth of the lever so that the handle and the lever are pivoted by a common angular speed in the first position of the toothed wheel. The teeth of the toothed wheel are only engaged with the teeth of the handle or the lever so that the handle and the lever are pivoted by different angular speed in the second position of the toothed wheel.

REFERENCES:
patent: 2607253 (1952-08-01), Gearhart
patent: 5419221 (1995-05-01), Cole
patent: 5941141 (1999-08-01), Whitley
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patent: 6101907 (2000-08-01), McGovern et al.
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patent: 6752048 (2004-06-01), Chiang
patent: 6840141 (2005-01-01), Cole
patent: 6928904 (2005-08-01), Hsien
patent: 6993998 (2006-02-01), Kao et al.
patent: 2005/0016332 (2005-01-01), Hu
patent: 2006/0137491 (2006-06-01), Chen

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