Lockable torque-limiting driver

Details Lockable torque-limiting driver Lockable torque-limiting driver

2009-07-17

2011-11-08

Shakeri, Hadi (Department: 3727)

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

C081S467000, C081S480000

Reexamination Certificate

active

08051751

ABSTRACT:
A lockable torque-limiting driver includes a body and a sleeve received in a sleeve chamber of the body and secured therein by recesses inside the body. The sleeve is provided with projecting edges on the outer wall to be respectively fitted in the recesses of the body, plural recessed grooves at the inner wall for fixing an upper cam, and female threads at the inner wall to be screwed with the male threads of a torque-limiting member, further disposed with plural positioning serrations at topside and a center chamber inside. The upper cam and a lower cam respectively have one-way serrations to be mutually engaged. The torque-limiting member is fixed with positioning projections to be actuated to move on the positioning serrations of the sleeve and give out sounds by which a user can know a torque limiting extent desired.

REFERENCES:
patent: 2797564 (1957-07-01), Bonneau et al.
patent: 4238978 (1980-12-01), Leone
patent: 7013769 (2006-03-01), Chen
patent: 7150212 (2006-12-01), Lee
patent: 7197968 (2007-04-01), Bubel
patent: 7272999 (2007-09-01), Cutler et al.
patent: 7487700 (2009-02-01), Cutler et al.

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