US PATENT SUBCLASS 137 / 625.13
.~.~.~ With subsequent closing of first port


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

561 R  DF  SYSTEMS {32}
625  DF  .~ Multi-way valve unit {12}
625.12  DF  .~.~ Sequentially progressive opening or closing of plural ports {1}
625.13.~.~.~ With subsequent closing of first port {2}
625.14  DF  .~.~.~.~> Flow combining with flow dividing
625.15  DF  .~.~.~.~> Rotary {1}


DEFINITION

Classification: 137/625.13

(under subclass 625.12) Devices in which the first opened port is subsequently closed by continued movement of the valve unit.