Ratchet tool

Details Ratchet tool Ratchet tool

1998-09-15

2000-04-11

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 60, 81 584, B25B 1346

Patent

active

060476176

ABSTRACT:
A ratchet tool includes a housing having a pair of protrusions oppositely extended inward of a chamber for forming two pairs of parallel channels. A gear is rotatably received in the chamber of the housing and has a driving shaft extended outward of the housing. Two pairs of pawls are slidably engaged in the channels and biased to engage with the gear for allowing the housing to drive the gear. The gear may be selectively driven in an active direction or in a reverse direction when one pair or the other pair of the pawls are disengaged from the gear.

REFERENCES:
patent: 3958469 (1976-05-01), Meese
patent: 5404773 (1995-04-01), Norville
patent: 5685204 (1997-11-01), Braun
patent: 5806381 (1998-09-01), Lin
patent: 5878635 (1999-03-01), Hsieh
patent: 5884537 (1999-03-01), Chen
patent: 5910196 (1999-06-01), Huang

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