US PATENT SUBCLASS 251 / 61.2
.~.~ Coaxial actuator, seat and valve


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

12  DF  FLUID ACTUATED OR RETARDED {12}
61  DF  .~ Flexible wall expansible chamber reciprocating valve actuator {2}
61.2.~.~ Coaxial actuator, seat and valve {3}
61.3  DF  .~.~.~> Valve between coaxial spring biasing means and actuator
61.4  DF  .~.~.~> Coaxial spring biasing means between valve and actuator
61.5  DF  .~.~.~> Actuator wall between valve and coaxial spring biasing means


DEFINITION

Classification: 251/61.2

(under subclass 61) Subject matter in which the movable control member, the seat or port for such member and the flexible wall working member are positioned and aligned along the same axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

63.5+, for a valve having a coaxial valve actuator comprising an expansible chamber device having a cylinder with a relatively movable piston therein.