US PATENT SUBCLASS 251 / 30.04
.~.~.~.~.~ Pilot valve movably mounted within or around main valve


Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

12  DF  FLUID ACTUATED OR RETARDED {12}
25  DF  .~ Pilot or servo type motor {8}
30.01  DF  .~.~ Electrically actuated pilot valve {1}
30.02  DF  .~.~.~ Main valve biased closed by fluid pressure {2}
30.03  DF  .~.~.~.~ Venting passage within movable main valve {1}
30.04.~.~.~.~.~ Pilot valve movably mounted within or around main valve


DEFINITION

Classification: 251/30.04

Pilot valve movably mounted within or around main valve:

(under subclass 30.03) Subject matter in which movement of the pilot valve is limited by the movable portion of the main valve, the pilot valve being either contained or guided by the movable portion of the main valve.