US PATENT SUBCLASS 210 / 217
.~.~.~ Drum

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

198.1  DF  WITH MEANS TO ADD TREATING MATERIAL {5}
209  DF  .~ Directly applied to separator {5}
216  DF  .~.~ Moving filter medium {1}
217.~.~.~ Drum

DEFINITION

Classification: 210/217

(under subclass 216) Apparatus in which the moving filter medium comprises a rotary drum.