US PATENT SUBCLASS 137 / 625.35
.~.~.~.~.~ With internal passage

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}
625.28  DF  .~.~ Dividing into parallel flow paths with recombining {4}
625.33  DF  .~.~.~ Reciprocating {2}
625.34  DF  .~.~.~.~ Spool {2}
625.35.~.~.~.~.~ With internal passage

DEFINITION

Classification: 137/625.35

(under subclass 625.34) Devices wherein one flow path is through the longitudinal axis of the spool, e.g., a hollow spool with flow therethrough.