US PATENT SUBCLASS 137 / 167
.~.~.~.~ Gas condensing type

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

154  DF  DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7}
156  DF  .~ Gas pressure discharge of liquids feed traps (e.g., to boiler) {3}
159  DF  .~.~ Gas pressure controlled by amount of liquid in trap {3}
165  DF  .~.~.~ Float responsive {3}
167.~.~.~.~ Gas condensing type

DEFINITION

Classification: 137/167

(under subclass 165) Feed-traps which are not provided with a gas outlet, as the gas applied to discharge the trap is in the form of a readily condensed vapor such as steam which condenses to eliminate the gas pressure after discharge to allow subsequent filling of the trap.