US PATENT SUBCLASS 251 / 23
.~.~ Dashpot interconnects actuator and 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}
23.~.~ Dashpot interconnects actuator and valve

DEFINITION

Classification: 251/23

(under subclass 15) Subject matter in which a valve biased toward its closed position is opened by a force transmitted through a trapped body of fluid in a chamber having a restricted inflow or outflow opening and recloses under its bias when sufficient flow through the restricted opening has taken place.

SEE OR SEARCH THIS CLASS, SUBCLASS:

57, for fluid link or column actuators for valves.