US PATENT SUBCLASS 209 / 491
.~.~.~ Automatic control

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

422  DF  STRATIFIERS {6}
484  DF  .~ Elements {9}
490  DF  .~.~ Discharging {4}
491.~.~.~ Automatic control

DEFINITION

Classification: 209/491

(under subclass 490) Apparatus and methods for automatically controlling the discharge from stratifiers, other than automatically-controlled ports or valves.