US PATENT SUBCLASS 210 / 271
.~.~ Surface traversing type

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

263  DF  PARTICULATE MATERIAL TYPE SEPARATOR, E.G., ION EXCHANGE OR SAND BED {13}
269  DF  .~ With rehabilitation means {6}
271.~.~ Surface traversing type {2}
272  DF  .~.~.~> Rotating on stationary axis
273  DF  .~.~.~> Moving fluid distributor

DEFINITION

Classification: 210/271

(under subclass 269) Apparatus having rehabilitation means which moves in a path parallel to and above the upper bed surface with or without parts projecting into the bed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

270, for apparatus having moving means to pick up and redeposit the particles of the separating medium.