Title: Torque limiting wrench

Abstract: A power tool having an adjustable torque-limiting coupling and a shut-off means, the coupling (or clutch) consisting of a driving member, a co-axial driven member and a coupling assembly comprising a tapered helical spring and means for adjusting the position of the spring on the driving and driven members, and the shut-off means sensing relative movement between the driving and driven members, and effecting shut-off.

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Inventors: Thackston, Clyde David (Columbia, SC, US)

Application Number: 534236
Filing Date: 1974-12-19
Publication_date: 1976-05-11
Assignee: Rockwell International Corporation (Pittsburgh, PA)
Primary Class(es): 192/150 173/181, 464/40
Other Classes:
US Patent Ref:

2626029	Jan, 1953	Gutterman	192/56.
3195704	Jul, 1965	Linsker	192/150.
3298481	Jan, 1967	Schaedler et al.	192/150.
3370680	Feb, 1968	Bangerter et al.	192/56.
3537275	Nov, 1970	Smith	192/41.

Other Refs:
Primary Examiner: Herrmann, Allan D.
Assistant Examiner:
Attorney: