US PATENT SUBCLASS 137 / 248
.~ Seal for relatively movable valving parts

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

247  DF  WITH LIQUID VALVES OR LIQUID TRAP SEALS {3}
248.~ Seal for relatively movable valving parts {1}
249  DF  .~.~> Horizontally moving valve {1}

DEFINITION

Classification: 137/248

(under subclass 247) Apparatus in which the liquid is used to seal a gap between relatively movable valving parts of a valve in at least one position of the valve, the liquid pool comprising in effect the seat for the movable valve element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

246+, for liquid sealing at a valve interface where the liquid is supplied to seal the crack and is washed away when the valve is opened.