US PATENT SUBCLASS 137 / 199
.~.~.~ Fluid sensing valve

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

154  DF  DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7}
171  DF  .~ Fluid separating traps or vents {5}
197  DF  .~.~ Discriminating outlet for gas {2}
199.~.~.~ Fluid sensing valve {2}
200  DF  .~.~.~.~> With vaporized liquid stop {1}
202  DF  .~.~.~.~> Float responsive

DEFINITION

Classification: 137/199

(under subclass 197) Separating traps wherein the discrimination is obtained by an outlet valve which is responsive to a fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

183+, for fluid responsive valves comprising discriminating outlets for liquids.

455+, for line condition change responsive valves of general types, and see the search notes to subclass 455.