US PATENT SUBCLASS 210 / 213
.~.~.~ With coaxial rotary impeller or distributor

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}
210  DF  .~.~ To interior of moving filter, e.g., drum {5}
213.~.~.~ With coaxial rotary impeller or distributor

DEFINITION

Classification: 210/213

(under subclass 210) Apparatus in which the filter element is rotary and there is a rotary impeller or distributor for the treating material which is coaxial with the axis of rotation of the filter element.