Drive device for an actuator

Details Drive device for an actuator Drive device for an actuator

1996-03-13

1998-03-17

Marmor, Charles A.

Motors: spring, weight, or animal powered

Spring

With winding means

251 69, 25112911, F03G 108, F24F 1308

Patent

active

057276536

ABSTRACT:
A drive device for controlling the position of an actuator includes an electric motor for actuating the drive device. The motor is coupled to a gear mechanism and adapted to control the position of the actuator by selective operation thereof. A gear mechanism operatively coupled to the motor and to the actuator has a restoring spring and an auxiliary spring, each of which is tightenable to store energy therein by operation of the motor upon startup. In the event of a power loss to the motor, the gear mechanism operates to use the stored energy of the restoring spring to move the actuator to a preselected position. The stored energy of the auxiliary spring is used to counteract against moment of the motor at rest.

REFERENCES:
patent: 4273307 (1981-06-01), Malinski et al.
patent: 4581987 (1986-04-01), Ulicny
patent: 4595081 (1986-06-01), Parsons
patent: 4621789 (1986-11-01), Fukamachi
patent: 5205534 (1993-04-01), Giordani
patent: 5310021 (1994-05-01), Hightower
patent: 5518462 (1996-05-01), Yach

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