US PATENT SUBCLASS 137 / 246.2
.~.~.~ Seating

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

237  DF  WITH CLEANER, LUBRICATION ADDED TO FLUID OR LIQUID SEALING AT VALVE INTERFACE {2}
246  DF  .~ Liquid supplied at valve interface {8}
246.15  DF  .~.~ Screw feed {3}
246.2.~.~.~ Seating

DEFINITION

Classification: 137/246.2

(under subclass 246.15) Valves wherein the lubrication pressure aids in seating of the valve.