US PATENT SUBCLASS 251 / 323
.~.~.~.~ Spring abuts valve stem guide

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

318  DF  RECIPROCATING VALVE {7}
319  DF  .~ Push or pull operator {1}
320  DF  .~.~ Biased {1}
321  DF  .~.~.~ Spring {2}
323.~.~.~.~ Spring abuts valve stem guide

DEFINITION

Classification: 251/323

(under subclass 321) Valves wherein the spring abuts a guide for the valve stem.