US PATENT SUBCLASS 137 / 614.18
.~.~ One valve head carries other valve head

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}
614.18.~.~ One valve head carries other valve head

DEFINITION

Classification: 137/614.18

(under subclass 613) Systems in which the head portion of one valve is carried by and movable with the head of another valve.