US PATENT SUBCLASS 137 / 246.12
.~.~ Line pressure feed

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}
246.12.~.~ Line pressure feed

DEFINITION

Classification: 137/246.12

(under subclass 246) Valves wherein line pressure is used to feed the sealing liquid.