US PATENT SUBCLASS 209 / 274
.~ Concave and convex sifters

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

233  DF  SIFTING {16}
274.~ Concave and convex sifters {3}
275  DF  .~.~> Reciprocating {1}
279  DF  .~.~> Rotating {1}
281  DF  .~.~> Stationary {2}

DEFINITION

Classification: 209/274

(under subclass 233) Sifting devices curved concavely or convexly on the surfaces to which material is delivered and having both reciprocating and rotating motion, or not coming under the subclasses indented hereunder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

309, for reciprocating and rotating horizontal or inclined plane sifters.