Torque adjustable screw driver

Details Torque adjustable screw driver Torque adjustable screw driver

2006-03-21

2006-03-21

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

C081S467000, C081S475000, C081S476000

Reexamination Certificate

active

07013769

ABSTRACT:
A torque adjustable screw driver includes a handle and a shank connected to an end of the handle. Two disks are mounted to the shank and each have an inclined end surface. The two respective inclined end surfaces contact each other and one of which includes protrusions and the other has grooves which are sized to receive the protrusions. A sleeve is mounted to the shank and a spring is biased between the inner bottom of the sleeve and the two disks so that the two disks can be rotated from each other when the torque is large enough to make the two disks have relative rotational movement. The required torque can be adjusted by rotating one of the two disks to push the other disk to compress the spring.

REFERENCES:
patent: 5737982 (1998-04-01), Lin
patent: 5813298 (1998-09-01), Beattie
patent: 6339977 (2002-01-01), Lee et al.
patent: 6349625 (2002-02-01), Poganski
patent: 6912934 (2005-07-01), Liao
patent: 2005/0193870 (2005-09-01), Chen

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