Ratchet tool having improved driving shank

Details Ratchet tool having improved driving shank Ratchet tool having improved driving shank

2005-08-30

2005-08-30

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S060000, C081S438000

Reexamination Certificate

active

06935211

ABSTRACT:
A ratchet tool includes a seat rotatably secured to a housing and having a number of teeth, a driving stem is engaged in the seat and has an engaging hole to receive a tool member, two pawls are slidably engaged in the housing and biased to engage with the teeth of the seat. A device may selectively disengage the pawls from the teeth of the seat to control a rotational direction of the seat by the housing. The driving stem includes a narrower neck formed in the other end to form a head and to engage with and to drive tool elements. The provision of the narrower neck in the driving stem permits the driving stem to rotate relative to the tool elements.

REFERENCES:
patent: 1578114 (1926-03-01), Fegley
patent: 4781085 (1988-11-01), Fox, III
patent: 4962682 (1990-10-01), Rose et al.
patent: 5570616 (1996-11-01), Thompson et al.
patent: 5687820 (1997-11-01), Lin
patent: 5943924 (1999-08-01), Jarvis
patent: 5964132 (1999-10-01), Chen
patent: 6047802 (2000-04-01), Huang
patent: 6058812 (2000-05-01), Casel et al.
patent: 6151994 (2000-11-01), Shiao
patent: 6260452 (2001-07-01), Yu
patent: 6622597 (2003-09-01), Chen

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