US PATENT SUBCLASS 137 / 614.17
.~.~.~ Also carries head of other 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}
614.16  DF  .~.~ One valve head provides seat for other head {1}
614.17.~.~.~ Also carries head of other valve

DEFINITION

Classification: 137/614.17

(under subclass 614.16) Systems in which a valve comprising a head and seat is carried by and movable with the head of another valve.