US PATENT SUBCLASS 251 / 30.01
.~.~ Electrically actuated pilot 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.~.~ Electrically actuated pilot valve {1}
30.02  DF  .~.~.~> Main valve biased closed by fluid pressure {2}

DEFINITION

Classification: 251/30.01

Electrically actuated pilot valve:

(under subclass 25) Subject matter in which the auxiliary or pilot valve controlling the valve is operated by electrical energy.

SEE OR SEARCH THIS CLASS, SUBCLASS:

32, for electrically released trip pilot valves.

129.01+, for electrical actuators for main valves, and see the search notes to subclass 129.

SEE OR SEARCH CLASS

137, Fluid Handling,

596.16, for an electrically actuated pilot valves for supply and exhaust valves, and subclass 625.64 for an electrically actuated pilot valve for a supply and exhaust multiway valve unit.