US PATENT SUBCLASS 137 / 188
.~.~.~.~.~ Weight or pressure

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}
177  DF  .~.~ Discriminating outlet for liquid {4}
183  DF  .~.~.~ With fluid responsive valve {3}
187  DF  .~.~.~.~ Level responsive {2}
188.~.~.~.~.~ Weight or pressure {1}
189  DF  .~.~.~.~.~.~> Gravitating vessel {1}

DEFINITION

Classification: 137/188

(under subclass 187) Separating traps wherein the valve is responsive to the weight or pressure of accumulated liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

403+, for control devices responsive to the weight of accumulated liquid, and see the search notes to subclass 403.