Ratchet wrench having exact limit effect

Details Ratchet wrench having exact limit effect Ratchet wrench having exact limit effect

2005-11-01

2005-11-01

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S063000

Reexamination Certificate

active

06959626

ABSTRACT:
A ratchet wrench includes a handle, a drive head, a ratchet wheel, a control knob, and a substantially C-shaped limit spring. Thus, the control knob is rigidly and stably positioned in the receiving chamber of the drive head by the limit spring, thereby facilitating a user operating the control knob. In addition, the ratchet wrench only needs to provide a limit spring to position the control knob rigidly and stably, so that the ratchet wrench has a simplified construction, thereby decreasing costs of fabrication.

REFERENCES:
patent: 4561329 (1985-12-01), Lack
patent: 4562757 (1986-01-01), Furey
patent: 6513409 (2003-02-01), Lee
patent: 2005/0011314 (2005-01-01), Chen

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