US PATENT SUBCLASS 209 / 301
.~.~.~ Reciprocating and rotating

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  .~.~ Vertical {4}
301.~.~.~ Reciprocating and rotating

DEFINITION

Classification: 209/301

(under subclass 233) Cylindrical or drum sifters having vertical axes and having means for both reciprocating and rotating them.