US PATENT SUBCLASS 137 / 596.14
.~.~ Pilot-actuated

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

561 R  DF  SYSTEMS {32}
596  DF  .~ Supply and exhaust {4}
596.14.~.~ Pilot-actuated {2}
596.15  DF  .~.~.~> Common to plural valve motor chambers
596.16  DF  .~.~.~> Electric

DEFINITION

Classification: 137/596.14

(under subclass 596) Device in which the valves are actuated by fluid pressure motive means controlled by an auxiliary or pilot valve.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

25+, for pilot valve controlled fluid actuated valves.