US PATENT SUBCLASS 137 / 625.25
.~.~.~ Reciprocating valve

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}
625.2  DF  .~.~ Supply and exhaust {4}
625.25.~.~.~ Reciprocating valve {3}
625.26  DF  .~.~.~.~> Combined disk or plug and gate or piston
625.27  DF  .~.~.~.~> Plural disk or plug
625.67  DF  .~.~.~.~> Piston valve {2}

DEFINITION

Classification: 137/625.25

(under subclass 625.2) Devices wherein the valve unit reciprocates rectilinearly.