US PATENT SUBCLASS 137 / 630.17
.~.~.~ Simultaneously moved port controllers

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

561 R  DF  SYSTEMS {32}
628  DF  .~ Sequentially progressive opening or closing of plural valves {4}
630.16  DF  .~.~ With subsequent closing of first opened port {1}
630.17.~.~.~ Simultaneously moved port controllers

DEFINITION

Classification: 137/630.17

(under subclass 630.16) Systems in which the valves are so related to each other that motion of one is necessarily accompanied by motion of the other, or others.