US PATENT SUBCLASS 137 / 196
.~.~.~.~.~.~ With pressure balanced outlet 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}
177  DF  .~.~ Discriminating outlet for liquid {4}
183  DF  .~.~.~ With fluid responsive valve {3}
187  DF  .~.~.~.~ Level responsive {2}
192  DF  .~.~.~.~.~ Float {4}
196.~.~.~.~.~.~ With pressure balanced outlet valve

DEFINITION

Classification: 137/196

(under subclass 192) Separating traps wherein a plurality of coacting liquid outlet valves are arranged to act in opposition or a single outlet valve is provided with opposed surfaces to cancel out the effect of internal pressure on the valve.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

281+, for balanced valves of general utility and see the search notes thereto.