US PATENT SUBCLASS 137 / 289
.~ Balanced valve

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

272  DF  HYDRANT TYPE {15}
289.~ Balanced valve

DEFINITION

Classification: 137/289

(under subclass 272) Apparatus in which the valve is balanced, i.e., has opposed surfaces of equal or nearly equal area exposed to the line fluid pressure.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

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