One-way wrench

Details One-way wrench One-way wrench

2005-02-15

2005-02-15

Ackun, Jr., Jacob K. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

Reexamination Certificate

active

06854362

ABSTRACT:
A one-way wrench includes a head, biasing means, a pawl and a gear. The head defines a circular space, a crescent space communicated with the circular space and a hole communicated with the crescent space. The biasing means includes a first spring and a weaker and longer second spring. The springs both include a first end put in the hole and a second end put in the crescent space. The pawl is movably put in the crescent space and includes an end abutted against the second end of the second spring and a toothed side. The gear is rotationally put in the circular space and includes a toothed periphery for engagement with the toothed side of the pawl.

REFERENCES:
patent: 6134990 (2000-10-01), Ling et al.
patent: 6446530 (2002-09-01), Chang

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