Extension structure for tool

Details Extension structure for tool Extension structure for tool

2006-03-21

2006-03-21

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle or shank

C081S177100, C081S177200, C081S489000, C403S325000

Reexamination Certificate

active

07013766

ABSTRACT:
An extension structure for a tool includes a main body, a drive rod movably mounted in the main body, an elastic member mounted in the main body and urged between the main body and the drive rod, and a rotation control member rotatably mounted on the main body and rested on the drive rod, so that the drive rod is moved in the main body by rotation of the rotation control member. Thus, the extension structure is assembled easily and quickly and has a rigid construction without detachment.

REFERENCES:
patent: 5386747 (1995-02-01), Grover
patent: 5390571 (1995-02-01), Fox et al.
patent: 5531140 (1996-07-01), Chow
patent: 6003414 (1999-12-01), Hsieh
patent: 6199457 (2001-03-01), Hoff et al.
patent: 6327941 (2001-12-01), Cheng
patent: 6523441 (2003-02-01), Lee

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