US PATENT SUBCLASS 251 / 36
.~.~.~ With separate dashpot or choked fluid retarding chamber

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}
33  DF  .~.~ Choked pressure type servo motor {8}
36.~.~.~ With separate dashpot or choked fluid retarding chamber

DEFINITION

Classification: 251/36

(under subclass 33) Subject matter in which an expansible chamber, other than or in addition to the servo-motor chamber, is provided with a restricted passage to retard the rate of travel of the main valve.

(1) Note. The expansible chamber may receive fluid from the line or from a separate source, as in the closed fluid circuit dashpot.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47, for servo operated valves having separate dashpot chambers, in which the servo mechanism is other than of the choked pressure type.

48+, for nonfluid actuated valves having similar retarding means, especially subclasses 50+ for expansible chambers receiving fluid from the line and subclass 54 for closed circuit dashpots.