US PATENT SUBCLASS 251 / 39
.~.~.~.~ Controls inlet to choke chamber

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}
33  DF  .~.~ Choked pressure type servo motor {8}
38  DF  .~.~.~ Pilot valve seated in motor or valve element {2}
39.~.~.~.~ Controls inlet to choke chamber

DEFINITION

Classification: 251/39

(under subclass 38) Subject matter in which the pilot valve admits the higher pressure to the motor chamber and the choke establishes a restricted communication between the motor chamber and the lower pressure.

SEE OR SEARCH CLASS

137, Fluid Handling,

490, for fluid pressure servo type condition responsive valve in which the pilot valve is within the main valve head.