US PATENT SUBCLASS 251 / 19
.~.~ Auxiliary pilot valve overrides a first pilot valve

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

12  DF  FLUID ACTUATED OR RETARDED {12}
15  DF  .~ Compulsory cut-off after flow period {6}
19.~.~ Auxiliary pilot valve overrides a first pilot valve

DEFINITION

Classification: 251/19

(under subclass 15) Subject matter in which the main valve is opened by adjustment of a control or pilot valve in a servo actuating system for the main valve but is caused to start closing by a second control or pilot valve made effective by the opening of the main valve, irrespective of the adjustment of the first pilot valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29, for fluid actuated pilot valves with additional pilot valve control.