Pawl mechanism of a ratchet wrench

Details Pawl mechanism of a ratchet wrench Pawl mechanism of a ratchet wrench

2006-05-23

2006-05-23

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S063200

Reexamination Certificate

active

07047842

ABSTRACT:
A pawl mechanism of a ratchet wrench, including a wrench main body, a pawl, a ratchet wheel and a shift member. Four engaging recesses are formed on a bottom of a first recess of the wrench main body. A first engaging channel and a second engaging channel are respectively formed on two sides of the pawl corresponding to two of the four engaging recesses of the wrench main body. A spring and a steel ball are disposed in each of the engaging channels, whereby the steel balls can be located in the corresponding engaging recesses of the wrench main body.

REFERENCES:
patent: 3250157 (1966-05-01), Badger
patent: 3733936 (1973-05-01), Flynn
patent: 5913954 (1999-06-01), Arnold et al.
patent: 5957009 (1999-09-01), McCann
patent: 6134991 (2000-10-01), Chaconas
patent: 6164167 (2000-12-01), Chen
patent: 6516692 (2003-02-01), Hsien
patent: 6868759 (2005-03-01), Tuan-Mu
patent: 2002/0194965 (2002-12-01), Chen
patent: 2003/0079572 (2003-05-01), Ho

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