US PATENT SUBCLASS 251 / 359
.~ Seats

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

356  DF  VALVE {5}
359.~ Seats {3}
360  DF  .~.~> Removable {3}
364  DF  .~.~> Head engaging gasket
365  DF  .~.~> Retained by seat deformation

DEFINITION

Classification: 251/359

(under subclass 356) Subject matter comprising the normally stationary valving element with which the head or movable element cooperates.

SEE OR SEARCH THIS CLASS, SUBCLASS:

328, for gate valve seats.

SEE OR SEARCH CLASS

137, Fluid Handling,

513.3+, for seats of direct response valves with leak passages.