Torque adjustable screwdriver having a torque indicator

Details Torque adjustable screwdriver having a torque indicator Torque adjustable screwdriver having a torque indicator

2007-07-11

2009-02-03

Thomas, David B (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

C081S474000

Reexamination Certificate

active

07484442

ABSTRACT:
A torque adjustable screwdriver having a torque indicator comprises a holding portion including a handle, a spring and a stopper which are received in the handle. An operation unit has a ratchet unit, a rotary rod, an exposed post, and a screwdriver head. The rotary rod is installed within the handle and passes through the spring and the stopper. The ratchet unit has an approximate cylinder shape and one end surface of the ratchet unit is formed as a sawteeth surface. In assembly, the rotary rod is engaged to the teeth of the enlarged end of the rotary rod. A setting unit includes a driving rod, a rotary unit, a resisting unit, and an adjusting cover. The rotary unit is a hollow cylinder with outer threads at one end. An inner side of the rotary unit has the outer threads being formed with teeth.

REFERENCES:
patent: 6095020 (2000-08-01), Rinner
patent: 6640674 (2003-11-01), Rinner et al.
patent: 7013769 (2006-03-01), Chen

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