US PATENT SUBCLASS 251 / 149.6
.~.~.~ Motion opposed by valve spring

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

142  DF  WITH CORRELATED FLOW PATH {9}
149  DF  .~ Valve operated by joining flow path sections {1}
149.1  DF  .~.~ Joining motion includes linear valve operating component {5}
149.6.~.~.~ Motion opposed by valve spring {1}
149.7  DF  .~.~.~.~> Contact only, or friction, joint

DEFINITION

Classification: 251/149.6

(under subclass 149.1) Subject matter wherein the closing-element is spring biased and this spring opposes the linear component of motion.