US PATENT SUBCLASS 251 / 245
.~.~.~.~.~ Spring stop on 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  DF  .~.~.~.~ Co-axial with valve stem {2}
245.~.~.~.~.~ Spring stop on valve stem

DEFINITION

Classification: 251/245

(under subclass 244) Apparatus wherein the spring abuts a stop (e.g., a collar) on the valve stem and thereby the valve head is pulled to its seat.