Wrench having a ratchet wheel

Details Wrench having a ratchet wheel Wrench having a ratchet wheel

2005-03-08

2005-03-08

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S058000, C192S04100R

Reexamination Certificate

active

06862955

ABSTRACT:
A wrench comprises an enclosed box portion comprising an opening having an upper groove, an internal crescent cavity adjacent a handle and being in communication with the opening, a positioning mechanism including a ring disposed in the opening and a spring urged against a wall of the cavity, a pawl in the cavity leaned against the wall of the cavity, a ring member having an annular recess, a flexible C-ring put on the recess, and a ratchet wheel in the opening and having an upper portion with the ring member fitted therearound so that the C-ring can be disposed in both the recess and the groove. Counterclockwise rotating the wrench will transfer exerted force to projections on an inner wall of the opening since the pawl is prevented from rotating about the ratchet wheel. Clockwise rotating the wrench will disable the projections for enabling an angle adjustment of exerted force.

REFERENCES:
patent: 5636557 (1997-06-01), Ma
patent: 6382051 (2002-05-01), Chang
patent: 6748825 (2004-06-01), Hsu
patent: 20030213342 (2003-11-01), Wu

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