US PATENT SUBCLASS 137 / 246.15
.~.~ Screw 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}
246.15.~.~ Screw feed {3}
246.16  DF  .~.~.~> With check valve {2}
246.19  DF  .~.~.~> Jacking
246.2  DF  .~.~.~> Seating

DEFINITION

Classification: 137/246.15

(under subclass 246) Valves having a screw means (e.g., screw fed plunger) for feeding the fluid.