Electric-powered spring-return actuating device

Details Electric-powered spring-return actuating device Electric-powered spring-return actuating device

1985-04-01

1986-09-23

Shoop, Jr., William M.

Electricity: motive power systems

Having rotor element biased against rotation

By resilient biasing means

318 9, 318 40, 318 54, 251 25, 25112911, F16K 3144

Patent

active

046137980

ABSTRACT:
Electric-powered actuating device usable for the positioning control of valves and the like, featuring a motor, mechanical and spring means capable of driving said valve or other attached devices into a predetermined safety position in case of electrical signal or power failure; said actuating device having electrical amplifying means capable of providing pulsed current to drive said motor in one direction, a direct current to hold the motor in a selected position or, no power, to allow the mechanical and spring means to reverse the motor direction.

REFERENCES:
patent: 3743182 (1973-07-01), Harmon et al.
patent: 3955792 (1976-05-01), Cho
patent: 4097786 (1978-06-01), Lund
patent: 4099704 (1978-07-01), Okumura et al.

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