Reversible rotary actuator with spring return

Details Reversible rotary actuator with spring return Reversible rotary actuator with spring return

1984-09-10

1986-06-17

Herrmann, Allan D.

Motors: spring, weight, or animal powered

Spring

With winding means

25112911, F03G 108

Patent

active

045950814

ABSTRACT:
The output shaft of a rotary actuator is rotated in one direction by an electric motor and is returned in the opposite direction by a spring which is wound during driving of the shaft by the motor. The motor drives the output shaft and winds the return spring by way of a speed-reducing, torque amplifying gear train. To enable the use of a lighter return spring and the use of a gear train effecting greater torque amplification from the motor to the output shaft, intermediate gears in the drive train apply winding torque to the return spring differentially of the drive torque applied to the output shaft.

REFERENCES:
patent: 2503563 (1950-04-01), Ray
patent: 3137475 (1964-06-01), Schoenecker et al.
patent: 4085345 (1978-04-01), Bullat
patent: 4203573 (1980-05-01), Boss
patent: 4533800 (1985-08-01), Parsons

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