Reinforcement structure for wrench head

Details Reinforcement structure for wrench head Reinforcement structure for wrench head

2006-01-03

2006-01-03

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S058000, C081S060000, C192S043100

Reexamination Certificate

active

06981434

ABSTRACT:
A wrench includes a head with an engaging wheel rotatably received in a through hole in the head and a recess is defined in an inner periphery of the through hole so as to receive two pawls therein. A recessed area is defined in a surface of the head and a bridge portion is located between the through hole and the recessed area. A space is defined in an underside of the bridge portion and in communication with the through hole. Each pawl has a protrusion and the space allows the protrusions of the pawl to be inserted in the recess without any orientation adjustment. A control member is rotatably received in the recessed area and has a concavity for retaining the two protrusions therein.

REFERENCES:
patent: 6457388 (2002-10-01), Chen
patent: 6789449 (2004-09-01), Liu
patent: 6857339 (2005-02-01), Chen

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