US PATENT SUBCLASS 209 / 158
.~.~ Vertical current

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

132  DF  FLUID SUSPENSION {2}
155  DF  .~ Liquid {5}
158.~.~ Vertical current {2}
159  DF  .~.~.~> With agitation
160  DF  .~.~.~> Expanding {1}

DEFINITION

Classification: 209/158

(under subclass 155) Methods and means vertically flowing liquid is employed to assort material.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation,

792+, for processes of rehabilitating a particulate bed filter; subclass 108 for flow, fluid pressure or material level backwash control for filter beds, and subclasses 269+ (particularly subclasses 275+) for particulate material type separators with rehabilitation means.