Patent ID: 6386218
Filing Date: 2002-05-14
Classification: F16K,G05D,Y10T

Abstract:
A solenoid operated valve assembly for variable pressure bleed proportional control comprising:(a) a valve body having a valving bore with a valving spool moveably disposed therein and an inlet port communicating with said bore and a control pressure outlet port communicating with said bore and axially spaced from said inlet port, said bore having an end wall with an aperture therethrough and a valve seat formed about said aperture on the side of said wail opposite said bore; (b) an exhaust port communicating with said valve seat; (c) a solenoid coil attached to said body and having an armature moveably disposed therewith and operable for movement in response to electrical energization of said coil and including a valve member operable for contacting and sealing on said valve seat and blocking flow thereacross, wherein upon de-energization of said coil said valve member is biased to a position contacting and sealing said valve seat and upon energization of said coil progressively from Zero to One Hundred Percent (0-100%) of maximum current, said valve member is proportionately moved away from said valve seat and said spool is moved to a position blocking said inlet when said coil is energized in the range of about Eighty to One Hundred Percent (80-100%) of maximum coil energization.