US PATENT SUBCLASS 137 / 246.19
.~.~.~ Jacking

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}
246.19.~.~.~ Jacking

DEFINITION

Classification: 137/246.19

(under subclass 246.15) Valves wherein the lubrication pressure lifts the valve from its seat.

SEE OR SEARCH THIS CLASS, SUBCLASS:

246.18, for "jacking" with a check valve in the lubrication system.