Wrench structure

Details Wrench structure Wrench structure

2005-02-22

2005-02-22

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S058000, C081S060000, C192S043100

Reexamination Certificate

active

06857339

ABSTRACT:
A wrench structure includes a drive head formed with a receiving chamber and having an end face formed with a direction control recess. The end face of the drive head is formed with a spacing portion. Thus, the spacing portion is continuously extended through the end face of the drive head and is not broken, so that the end face of the drive head is continuously extended through the drive head and is not broken, thereby preventing the stress from being concentrated on the portion between the receiving chamber and the direction control recess of the drive head, such that the structural strength of the drive head can be enhanced.

REFERENCES:
patent: 3436992 (1969-04-01), Over et al.
patent: 6279428 (2001-08-01), Huang
patent: 6516930 (2003-02-01), Chen
patent: 6575060 (2003-06-01), Tseng et al.
patent: 6691594 (2004-02-01), Chen

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