US PATENT SUBCLASS 251 / 322-- .~.~.~.~ Spring stop on valve stem

US PATENT SUBCLASS 251 / 322
.~.~.~.~ Spring stop on valve stem

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}
322		.~.~.~.~ Spring stop on valve stem

DEFINITION

Classification: 251/322

(under subclass 321) Valves wherein a stop (e.g., a collar) for the spring is provided on the valve stem.