US PATENT SUBCLASS 251 / 61.5
.~.~.~ Actuator wall between valve and coaxial spring biasing means

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}
61.5.~.~.~ Actuator wall between valve and coaxial spring biasing means

DEFINITION

Classification: 251/61.5

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