US PATENT SUBCLASS 251 / 46
.~.~.~.~ Diaphragm or bellows motor element

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}
43  DF  .~.~.~ Main valve biased open by line pressure {2}
46.~.~.~.~ Diaphragm or bellows motor element

DEFINITION

Classification: 251/46

(under subclass 43) Subject matter in which the servo-motor is of the type using a flexible wall or membrane that is deflected by the applied servo pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61+, for diaphragm or bellows type fluid pressure valve actuators not of the servo type.

SEE OR SEARCH CLASS

92, Expansible Chamber Devices,

34+, for a bellows type expansible chamber device, and subclasses 90+ for a flexible wall type expansible chamber device.