Actuator having timer-controlled power switching device

Details Actuator having timer-controlled power switching device Actuator having timer-controlled power switching device

1999-04-29

2000-07-04

Nappi, Robert E.

Electricity: motive power systems

Braking

310 83, H02K 710

Patent

active

060843659

ABSTRACT:
An electromechanical actuator is adapted to be connected to an external device for displacing the external device to a predetermined position and maintaining the external device at that position. The actuator includes a housing which holds a drive motor for driving the external device to the predetermined position when the motor is energized and a brake mechanism for maintaining the external device at the predetermined position when the brake mechanism is activated. A switching device generates switching signals for energizing the motor to drive the external device to the predetermined position and for de-energizing the motor and activating the brake mechanism when a predetermined time has passed from a moment the drive motor is energized, to maintain the external device at the predetermined position.

REFERENCES:
patent: 3575621 (1971-04-01), Voland
patent: 3598214 (1971-08-01), Harris
patent: 4557317 (1985-12-01), Harmon, Jr.

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