US PATENT SUBCLASS 210 / 268
.~ Gravity flow of particles 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}
268.~ Gravity flow of particles type

DEFINITION

Classification: 210/268

(under subclass 263) Apparatus in which means is provided for removing particles from the bottom of the bed so that the bed of separating material as a whole moves downwardly by gravity.

SEE OR SEARCH THIS CLASS, SUBCLASS:

189, for apparatus wherein the particles are moved between plural containers or plural compartments in the same container.

270, for apparatus which is provided with moving means to pick up and redeposit the particles during rehabilitation.