T-shaped ratchet wrench

Details T-shaped ratchet wrench T-shaped ratchet wrench

2007-01-02

2007-01-02

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S177200

Reexamination Certificate

active

11176905

ABSTRACT:
A T-shaped ratchet wrench having a main body and a force-applying auxiliary arm. The main body includes a cross shaft and a working shaft. A ratchet driving mechanism having a change-over selector is disposed within an intersection position of both shafts. Each end of the cross shaft having an annular groove, and the working shaft has a polygonal head for inserting into a sleeve. Furthermore, the working shaft includes an annular groove in close vicinity to the cross shaft. The force-applying auxiliary arm includes an internal hole for mounting on either end of the working shaft or the cross shaft of the main body. The force-applying auxiliary arm has one end with an engaging socket and another end with a handle portion.

REFERENCES:
patent: 5797300 (1998-08-01), Fairbanks
patent: 5943924 (1999-08-01), Jarvis
patent: 6240809 (2001-06-01), Sasarak
patent: 6263766 (2001-07-01), Jarvis
patent: 6286395 (2001-09-01), Frazier
patent: 6336382 (2002-01-01), Cerda
patent: 6408721 (2002-06-01), Lee
patent: 6938521 (2005-09-01), Skeens
patent: 2001/0020403 (2001-09-01), Jarrett
patent: 2002/0088311 (2002-07-01), Cerda
patent: 2003/0188605 (2003-10-01), Chang

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