Mechanical return fail-safe actuator for damper, valve, elevator

Details Mechanical return fail-safe actuator for damper, valve, elevator Mechanical return fail-safe actuator for damper, valve, elevator

1999-02-19

2000-08-08

Masih, Karen

Electricity: motive power systems

Having rotor element biased against rotation

318478, 318160, 318563, 307 66, 307117, 364184, A02K 710

Patent

active

061006556

ABSTRACT:
The electrically powered actuator includes a capacitor for supplying supplemental electrical power to a motor in response to a loss of power to the motor from a main power source in order to enable the motor to overcome the magnetic resistance of the motor and a frictional resistance of a gear train in order to bias a positioning device into a retracted fail-safe position. The supplemental electrical power supplied to the motor supplements the biasing force of a spring or the like for biasing the positioning device from an extended position into the retracted fail-safe position. The capacitor is connected to the electrical circuit of the motor so as to be charged during normal operation of the motor and for delivering a pulse of reverse polarity power to the motor in response to a loss of power to the motor from the main source of power.

REFERENCES:
patent: 4129811 (1978-12-01), Pearson
patent: 4353271 (1982-10-01), Pieczulewski
patent: 4613798 (1986-09-01), Baumann
patent: 4637296 (1987-01-01), Hirosaki et al.
patent: 4677355 (1987-06-01), Baumann
patent: 5144153 (1992-09-01), Scheppmann, II
patent: 5249858 (1993-10-01), Nusser
patent: 5422808 (1995-06-01), Catanese, Jr. et al.
patent: 5525963 (1996-06-01), Purssey
patent: 5576581 (1996-11-01), Iannuzzi et al.
patent: 5744876 (1998-04-01), Fangio
patent: 5744923 (1998-04-01), Strauss et al.

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