Power screwdriver

Details Power screwdriver Power screwdriver

1985-05-10

1987-03-10

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

7386231, 7386235, 173 12, B25B 23145

Patent

active

046482822

ABSTRACT:
A power screwdriver or nutsetter has an output shaft provided with a torque measuring transducer and a shaft rotation angle transducer mounted thereon. Tool output torque or final turning of a screw or nut can be measured directly and transmitted to a control unit through a shaft mounted slipring assembly. In one embodiment a bevel gear drive is connected to the output shaft and a force measuring transducer is mounted between the shaft and the tool housing for measuring gear reaction forces corresponding to tool output torque.

REFERENCES:
patent: 3596718 (1971-08-01), Fish et al.
patent: 4084429 (1978-04-01), Boland
patent: 4104778 (1978-08-01), Vliet
patent: 4162639 (1979-07-01), Gill
patent: 4544039 (1985-10-01), Crane

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