US PATENT SUBCLASS 137 / 625.49
.~.~.~ Combined disk or plug and gate or piston

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}
625.48  DF  .~.~ Reciprocating valve unit {2}
625.49.~.~.~ Combined disk or plug and gate or piston

DEFINITION

Classification: 137/625.49

(under subclass 625.48) Devices wherein the valve unit comprises a disk or plug for closing one port and a gate or piston for closing another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

625.17, for similar structure wherein the operation is by selective reciprocation or rotation.