US PATENT SUBCLASS 251 / 47
.~.~ With separate dashpot or choked fluid retarder


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}
47.~.~ With separate dashpot or choked fluid retarder


DEFINITION

Classification: 251/47

(under subclass 25) Subject matter in which an expansible fluid chamber other than the servo motor has a fluid restricting flow passage in communication therewith and is associated with either the main or pilot valves to resist or retard their motions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

36, for servo operated valves having separable dashpot chambers, in which the servo mechanism is of the choked pressure type.

48+, for dashpot or fluid controlled retarders or timers for valves which do not have pilot or servo mechanisms.