Hand tool with a clutch device

Details Hand tool with a clutch device Hand tool with a clutch device

2007-08-28

2009-08-25

Thomas, David B (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

Reexamination Certificate

active

07578220

ABSTRACT:
A hand tool includes a handle a shank is inserted into an axial recess in the handle. Multiple first teeth extend inward from an inner periphery of the axial recess. Two plates extend axially from the top end of the handle and each plate includes a hook which has an inclined surface. A movable member is mounted to the top end of the handle and includes two extensions and each extension has a second inclined surface. A tubular member is mounted to the shank and multiple second teeth extend outward from the tubular member and are removably engaged with the first teeth. The two hooks removably hold the tubular member when a large torque is needed to be output, and the two hooks release the tubular member by pushing the movable member to move the two plates outward, the shank and the tubular member can be co-rotated with small torque.

REFERENCES:
patent: 5836223 (1998-11-01), Lin
patent: 6439086 (2002-08-01), Bahr
patent: 2008/0047404 (2008-02-01), Richter et al.
patent: 2008/0087142 (2008-04-01), Lin

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