Single coil vacuum/vent valve

Details Single coil vacuum/vent valve Single coil vacuum/vent valve

F - Mech Eng,Light,Heat,Weapons

15

B

137/43.1

F15B 13/044 (2006.01)

Patent

CA 1214377

ABSTRACT A no-flow vacuum control signal valve (10, 60) employing a single solenoid coil (34, 116) having a stationary ferromagnetic core (40, 68) and moveable permanent magnet armatures (46, 48, 100, 108) disposed adjacent the opposite ends of said core. The permanent magnet armatures function as individual valve poppets for individually opening and closing a vacuum vent port (18, 96) and a vacuum source port (28, 88) communicating with a valving chamber (14, 78, 80). A spring (50, 52, 104, 112) biases each poppet closed such that no fluid flows when the coil is not energized. Upon pulsing with current of one polarity of the coil, the vent port remains closed and the vacuum source port is opened. Upon pulsing of the coil with current of reverse polarity, the vent port is opened and the vacuum source port remainss closed. The valving chamber has a third fluid signal port (32, 98) adopted for connection thereto for control signal output.

444585

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