Control system for providing dual vacuum levels

Details Control system for providing dual vacuum levels Control system for providing dual vacuum levels

1996-06-19

1998-09-22

Ferensic, Denise L.

Valves and valve actuation

Electrically actuated valve

Including solenoid

25112901, 25112916, 137 82, 361160, F16K 3102

Patent

active

058103295

ABSTRACT:
A solenoid-type control system is disclosed, particularly for operating the locking hubs of a four-wheel drive vehicle. A solenoid valve assembly or mechanism has a coil member, a tubular member for directing air flow, and a valve mechanism at one end of the tubular member. A control circuit determines the level of energizing signal to the coil member which in turn controls the valve mechanism and the air flow passing through the tubular member. A switch mechanism has a moveable terminal which is operated by the level of energizing electrical signal.

REFERENCES:
patent: 3203447 (1965-08-01), Bremner et al.
patent: 3709253 (1973-01-01), Spangenberg
patent: 3921670 (1975-11-01), Clippard, Jr. et al.
patent: 4755958 (1988-07-01), Mizuhara
patent: 5027846 (1991-07-01), Baron

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