US PATENT SUBCLASS 137 / 614.14
.~.~.~.~ Biased valve

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

561 R  DF  SYSTEMS {32}
613  DF  .~ Flow path with serial valves and/or closures {7}
614.11  DF  .~.~ Common actuator {3}
614.13  DF  .~.~.~ Alternately seating {1}
614.14.~.~.~.~ Biased valve

DEFINITION

Classification: 137/614.14

(under subclass 614.13) Systems in which at least one valve is biased by spring means, gravity or fluid pressure.