US PATENT SUBCLASS 277 / 502
.~.~ For valve stem in internal combustion engine

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

345  DF  SEAL BETWEEN RELATIVELY MOVABLE PARTS (I.E., DYNAMIC SEAL) {10}
500  DF  .~ Circumferential contact seal for other than piston {13}
502.~.~ For valve stem in internal combustion engine

DEFINITION

Classification: 277/502

For valve stem in internal combustion engine:

(under subclass 500) Dynamic, circumferential contact seal wherein the seal is at the joint or juncture between a reciprocating part (i.e., stem of a valve controls the flow of gas in an internal combustion engine) and a housing part (i.e., a guide for a valve in an internal combustion engine).

SEE OR SEARCH CLASS

123, Internal-Combustion Engines,

188.6, for a seal in combination with a valve stem of an intake, exhaust or fuel valve of an internal combustion engine having a stationary opening (i.e., seat) and moving closure (i.e., head).