US PATENT SUBCLASS 251 / 41
.~.~.~ Remote pilot valve actuation

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}
41.~.~.~ Remote pilot valve actuation

DEFINITION

Classification: 251/41

(under subclass 33) Subject matter in which the pilot valve or an actuator therefor is located elsewhere than on or immediately adjacent the main valve unit, thus allowing operation of the main valve from a station more accessible than is available at the location of the main valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

57, for fluid link or column actuators for valves.

131, for remote control of electrically actuated valves.

293, for valves having an extension for the actuator.

294, for valves having a flexible actuator.

295, for pedal actuated valves.