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US Patent: 4,982,612
Torque Wrench with Measurements Independent of Hand-Hold Position
Patentee:
Nancy C. Rittmann (exact or similar names) - Racine, WI

USPTO Classifications:
73/862.23, 73/862.26

Tool Categories:
wrenches : torque wrenches

Assignees:
Snap-On Tools Corp. - Kenosha, WI

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Oct. 03, 1988
Granted: Jan. 08, 1991

Patent Pictures:
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Snap-On Tools Company History
Description:
Emrich & Dithmar - patent attorneys

Abstract

A torque measuring wrench includes a deflection beam provided with a socket head at one end and having a region of reduced cross-sectional area. Four strain gauges are mounted on the beam and connected in a measuring bridge, with one gauge disposed at the region of reduced cross-sectional area and the other gauges disposed closer to the ratchet head. A tubular handle is connected to the othe end of the beam and encloses battery-powered control circuit including indicating means. The torque wrench measurements are independent of the position along the handle at which the force is applied by the user.

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