Wrench capable of switching sense of rotation

Details Wrench capable of switching sense of rotation Wrench capable of switching sense of rotation

2008-01-29

2008-01-29

Thomas, David B (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S063000

Reexamination Certificate

active

07322263

ABSTRACT:
A wrench capable of switching sense of rotation comprises a handle, a head portion formed on one end of the handle and a switch mounted on the head portion of the handle. The head portion further comprises a ratchet wheel, a claw piece and an inverting piece. The switch further comprises two driving pieces downwardly extended from two lateral sides thereof. As either side of the switch is pressed down, the associated driving piece will be pushed against the inverting piece with a sloppy wall thereof, so as to restrict the rotation of the ratchet in one angular direction.

REFERENCES:
patent: 3970155 (1976-07-01), Otto
patent: 4125016 (1978-11-01), Lehoczky et al.
patent: 4280379 (1981-07-01), Chow
patent: 4336728 (1982-06-01), Deibert
patent: 4762032 (1988-08-01), Chow
patent: 6167788 (2001-01-01), Schonberger et al.
patent: 6886428 (2005-05-01), Hsien
patent: 2005/0257651 (2005-11-01), Chen

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