Vacuum actuator with fail-safe system

Details Vacuum actuator with fail-safe system Vacuum actuator with fail-safe system

1984-10-10

1985-09-17

Maslousky, Paul E.

Motors: expansible chamber type

Working member position responsive motive fluid control

91 49, 91376R, 91459, 92 94, F15B 13044, F15B 910, F01B 1900

Patent

active

045413240

ABSTRACT:
A vacuum responsive switch for detecting a failure in creation of a control vacuum within the control diaphragm chamber. A solenoid valve is provided which functions to equalize pressure within one of a power diaphragm chamber and a leak chamber with the other when vacuum represented by a signal from the vacuum responsive switch is lower than a predetermined value.

REFERENCES:
patent: 3448659 (1969-06-01), Beatenbough et al.
patent: 4189981 (1980-02-01), Ludwig
patent: 4388856 (1983-06-01), Cook

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