US PATENT SUBCLASS 251 / 363
.~.~.~ With seal

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

356  DF  VALVE {5}
359  DF  .~ Seats {3}
360  DF  .~.~ Removable {3}
363.~.~.~ With seal

DEFINITION

Classification: 251/363

(under subclass 360) Subject matter in which a separate element disposed between the seat and the seat-supporting body structure is provided to prevent leakage between the seat and said supporting structure.

SEE OR SEARCH CLASS

277, Seal for a Joint or Juncture, for a generic sealing means or process,

628+, for a static contact seal for other than an internal combustion engine, or a pipe, conduit, or cable.