US PATENT SUBCLASS 251 / 52
.~.~.~ Chamber fills on closing of main valve

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

12  DF  FLUID ACTUATED OR RETARDED {12}
48  DF  .~ Dashpot or fluid controlled retarder or timer {5}
50  DF  .~.~ Line pressure connected dashpot or choke chamber {2}
52.~.~.~ Chamber fills on closing of main valve

DEFINITION

Classification: 251/52

(under subclass 50) Subject matter in which fluid flows into the expansible chamber or dashpot during the closing movement of the valve.