US PATENT SUBCLASS 251 / 244
.~.~.~.~ Co-axial with valve stem

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

213  DF  MECHANICAL MOVEMENT ACTUATOR {10}
231  DF  .~ Lever {5}
236  DF  .~.~ Biased {3}
242  DF  .~.~.~ Spring {2}
244.~.~.~.~ Co-axial with valve stem {2}
245  DF  .~.~.~.~.~> Spring stop on valve stem
246  DF  .~.~.~.~.~> Spring abuts valve stem guide

DEFINITION

Classification: 251/244

(under subclass 242) Apparatus wherein the spring is co-axial with the valve stem.