US PATENT SUBCLASS 251 / 61.4
.~.~.~ Coaxial spring biasing means between valve and actuator

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  DF  .~.~ Coaxial actuator, seat and valve {3}
61.4.~.~.~ Coaxial spring biasing means between valve and actuator

DEFINITION

Classification: 251/61.4

(under subclass 61.2) Subject matter in which the flexible wall or control member is biased by spring means concentric with the axis of the control member and positioned between the flexible wall and the control member, the spring means acting between a fixed member and the flexible wall or control member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

63.6, for a valve and coaxial piston and cylinder expansible chamber valve actuator with a coaxial spring biasing means positioned between the valve and actuator.