Motor-driven, spring-returned rotary actuator

Details Motor-driven, spring-returned rotary actuator Motor-driven, spring-returned rotary actuator

1993-02-18

1994-05-10

Herrmann, Allan D.

Motors: spring, weight, or animal powered

Spring

With winding means

251 69, 251 77, 454257, 464160, F03G 108, F24F 700

Patent

active

053100212

ABSTRACT:
An electric motor acts through a gear train to rotate an output shaft in one direction while a torsion spring rotates the shaft in the opposite direction when the motor is de-energized. When the output shaft stops abruptly at a limit position after being rotated by the spring, a lost-motion drive connection permits the output gear of the drive train to rotate relative to the shaft in order to dissipate kinetic energy through the gear train and to avoid impact loading of the gear train and the motor.

REFERENCES:
patent: 3113639 (1963-12-01), Koplar et al.
patent: 3114216 (1963-12-01), Crawford et al.
patent: 3186514 (1965-06-01), Wallqvist
patent: 3359680 (1967-12-01), Lindsay
patent: 3610369 (1971-10-01), Rodgers
patent: 4581987 (1986-04-01), Ulicny
patent: 4595081 (1986-06-01), Parsons
patent: 4741508 (1988-05-01), Fukamachi

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