Torque wrench

Details Torque wrench Torque wrench

1979-06-18

1981-03-24

Woodiel, Donald O.

Measuring and testing

Brake testing

Single wheel rotating and resistance measuring means

73DIG4, G01L 524

Patent

active

042572630

ABSTRACT:
The present invention is directed to a torque wrench wherein a head comprises an engaging member capable of being coupled, antirotationally, with a screw or the like. A handle lever is movable within limits relative to the engaging member and a load sensor is provided between the engaging member and the handle lever and controls an indicating means. The load sensor according to the present invention is a piezoelectric member fitted with electrodes connected with the input of an electric amplifier which is fed by a battery housed in the handle lever. The electric amplifier controls an electronic indicator which indicates the torque applied to a screw or the like.

REFERENCES:
patent: 3813933 (1974-06-01), Weiss et al.
patent: 4073187 (1978-02-01), Avdeef

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