US PATENT SUBCLASS 137 / 166
.~.~.~.~ Liquid control valve positively actuated

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}
166.~.~.~.~ Liquid control valve positively actuated

DEFINITION

Classification: 137/166

(under subclass 165) Feed-traps wherein a valve in the liquid flow line to or from the trap is actuated by a distinct positively acting mechanism in conjunction with the float control of the gas inlet.

(1) Note. Self actuating valves such as check valves are not "positively" actuated.

(2) Note. See the class definition, section 3 for search notes on automatic valves combined with other actuating means.