Modulating failsafe valve actuator using differential gearing

Details Modulating failsafe valve actuator using differential gearing Modulating failsafe valve actuator using differential gearing

1976-12-06

1978-09-19

Wyche, Benjamin W.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

251133, 185 40R, F16H 2702

Patent

active

041144651

ABSTRACT:
A power operated rotary valve actuator utilizing a differential drive and magnetic clutch to provide continuous valve positioning between full open and full closed positions. The valve drive motor operates through a differential drive and in conjunction with a single electric clutch provides sequential application of rotational torque to a stored energy spring and the valve shaft. The sequential torque application minimizes drive system torque requirements and insures that sufficient energy is available to return the valve to a preselected position at any time during normal operation.

REFERENCES:
patent: B429434 (1976-02-01), Burkhardt et al.
patent: 3279744 (1966-10-01), Fieldsen et al.
patent: 3309871 (1967-03-01), Kelly
patent: 3889924 (1975-06-01), Karpenko
patent: 3979968 (1976-09-01), Ceccherini

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