US PATENT SUBCLASS 209 / 291
.~.~.~.~.~.~ Nested

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

233  DF  SIFTING {16}
*  DD  .~ Drum sifters {2}
*  DD  .~.~ Horizontal and inclined {4}
288  DF  .~.~.~ Rotating {3}
289  DF  .~.~.~.~ Multiple {2}
290  DF  .~.~.~.~.~ Concentric {1}
291.~.~.~.~.~.~ Nested

DEFINITION

Classification: 209/291

(under subclass 290) Series of rotating cylindrical or drum sifters on common horizontal or inclined axes the series being nested or mounted one within the other.