Power-screwdriver device with variable torque adjustment

Details Power-screwdriver device with variable torque adjustment Power-screwdriver device with variable torque adjustment

1985-09-09

1987-06-09

Kazenske, E. R.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81479, 7386232, B23Q 500

Patent

active

046713646

ABSTRACT:
A power-screwdriver device with variable torque adjustment consists essentially of a drive mechanism, transmission, and cutoff mechanism. In order to provide a power screwdriver that is strong and inexpensive and in which the torque can be controlled with no need for a torque clutch, there is a bearing site on a transmission shaft. The bearing allows the shaft to move radially. There is a sensor that emits a motor-cutoff signal when the shaft does move radially. The radial deviation is employed as a measure of torque. The measure is adjusted with an adjusting device.

REFERENCES:
patent: 2663209 (1953-12-01), Gummere et al.
patent: 3448610 (1969-06-01), Westbrook
patent: 3832897 (1974-09-01), Schenck
patent: 4185701 (1980-01-01), Boys
patent: 4485682 (1984-12-01), Stroczel et al.
patent: 4509375 (1985-04-01), Davis

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