US PATENT SUBCLASS 137 / 246
.~ Liquid supplied at valve interface

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.~ Liquid supplied at valve interface {8}
246.11  DF  .~.~> Plural feed
246.12  DF  .~.~> Line pressure feed
246.13  DF  .~.~> Feed by or with actuation
246.14  DF  .~.~> Loss control
246.15  DF  .~.~> Screw feed {3}
246.21  DF  .~.~> Spring biased piston feed
246.22  DF  .~.~> External pressure
246.23  DF  .~.~> Gravity or capillary feed

DEFINITION

Classification: 137/246

(under subclass 237) Systems in which a separate fluid is applied between the valve and its seats to seal the valve against passage of the fluent material carried by the system.

(1) Note. The sealing material may be a lubricant.

SEE OR SEARCH THIS CLASS, SUBCLASS:

247+, for liquid valves and liquid trap seals.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

355, for lubrication in which the lubricant does not enter the flow path.