US PATENT SUBCLASS 209 / 438
.~.~.~.~.~ Annular

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

422  DF  STRATIFIERS {6}
*  DD  .~ With liquid treatment {3}
*  DD  .~.~ Movable bed {3}
*  DD  .~.~.~ Chutes and tables {4}
437  DF  .~.~.~.~ Reciprocating {5}
438.~.~.~.~.~ Annular {1}
439  DF  .~.~.~.~.~.~> Divergent or opposite travel

DEFINITION

Classification: 209/438

(under subclass 437) Chutes or tables of annular or circular form having reciprocating motion on which material having constituents differing in mass is treated with accompanying or added liquid, so that the heaviest constituents settle as a stratum while the lighter form an overlying stratum or are carried away by the liquid.

(1) Note. This subclass takes devices in which there is no definite travel of both the heaviest and the lighter along the surface of the chutes or tables or in which there is travel of both such heaviest and lighter constituents in the same direction. This subclass will also take devices in which the heaviest and the lighter settle as strata in successive zones in the direction of flow of liquid along the surfaces.