Ratchet wrench having two driving torques

Details Ratchet wrench having two driving torques Ratchet wrench having two driving torques

2007-09-11

2007-09-11

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S062000

Reexamination Certificate

active

11642100

ABSTRACT:
A ratchet wrench includes a tubular member having an inner gear formed in a head, a rotor rotatably received in the head and having a compartment aligned with the inner gear for receiving a stronger latching device, two ratchet wheels rotatably received in the head, two weaker latching devices disposed in the rotor and each having a spring-biased pawl for engaging with the ratchet wheels and for controlling the driving direction of the rotor by the ratchet wheels. A drive shaft is rotatably received in the tubular member and includes a driving gear for engaging with the ratchet wheels and for controlling the driving direction of the rotor by the ratchet wheels.

REFERENCES:
patent: 1873472 (1932-08-01), Pfauser
patent: 4939961 (1990-07-01), Lee
patent: 5058463 (1991-10-01), Wannop
patent: 5960680 (1999-10-01), Chen et al.
patent: 6070499 (2000-06-01), Wisbey
patent: 6220123 (2001-04-01), Chen
patent: 6311584 (2001-11-01), Chu
patent: 6457386 (2002-10-01), Chiang

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