US PATENT SUBCLASS 251 / 171
.~.~ Packing presed by gland

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

157  DF  WITH MEANS TO INCREASE HEAD AND SEAT CONTACT PRESSURE {8}
170  DF  .~ Seat pressed to valve {3}
171.~.~ Packing presed by gland

DEFINITION

Classification: 251/171

(under subclass 170) Subject matter comprising compressible packing constituting a valve seat which is compressed by a packing gland-like element.

SEE OR SEARCH CLASS

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

637+, for a static contact seal for other than an internal combustion engine, or a pipe, conduit, or cable having a particular associated mounting or retaining means.