US PATENT SUBCLASS 137 / 596.2
.~.~.~ Biased closed

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

561 R  DF  SYSTEMS {32}
596  DF  .~ Supply and exhaust {4}
596.1  DF  .~.~ Biased exhaust valve {1}
596.2.~.~.~ Biased closed

DEFINITION

Classification: 137/596.2

(under subclass 596.1) Devices in which the exhaust valve is biased to closed position.