US PATENT SUBCLASS 209 / 454-- .~.~.~.~ Constant current

US PATENT SUBCLASS 209 / 454
.~.~.~.~ Constant current

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	.~.~ Stationary bed {3}
*	DD	.~.~.~ Permeable {2}
454		.~.~.~.~ Constant current

DEFINITION

Classification: 209/454

(under subclass 422) Apparatus including stationary

perforated or permeable supports to which material is delivered and through which constant currents of liquid are sent so that the heaviest constituents of the material may settle as a stratum while the lighter either form overlying strata or are carried away by the liquid.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation, appropriate subclasses, particularly

162, for fixed strainers in a flume stream, and subclasses 409+ for fluid cleaning of fixed strainers.