US PATENT SUBCLASS 251 / 63.6
.~.~.~ 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}
62  DF  .~ Piston type expansible chamber reciprocating valve actuator {3}
63.5  DF  .~.~ Coaxial actuator, seat and valve {1}
63.6.~.~.~ Coaxial spring biasing means between valve and actuator

DEFINITION

Classification: 251/63.6

(under subclass 63.5) Subject matter in which the movable working member of the expansible chamber device or the control member is biased by spring means concentric with the axis of the control member and positioned between the movable working member and control member, the spring means acting between a fixed member and the working member or control member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61.4, for a valve and coaxial flexible wall expansible chamber valve actuator with a coaxial spring biasing means positioned between the valve and actuator.