US PATENT SUBCLASS 137 / 625.6
.~.~.~ Pilot-actuated

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}
625.6.~.~.~ Pilot-actuated {3}
625.61  DF  .~.~.~.~> Variable orifice-type modulator {1}
625.63  DF  .~.~.~.~> Common to plural valve motor chambers
625.64  DF  .~.~.~.~> Electric

DEFINITION

Classification: 137/625.6

(under subclass 625.2) Device in which the valve unit is actuated by a 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.