US PATENT SUBCLASS 210 / 402
.~.~ Drum type

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

348  DF  FILTER {25}
359  DF  .~ Movable medium {12}
402.~.~ Drum type {2}
403  DF  .~.~.~> Internal feed
404  DF  .~.~.~> Annular segmented compartment

DEFINITION

Classification: 210/402

(under subclass 359) Apparatus in the shape of a drum.

SEE OR SEARCH THIS CLASS, SUBCLASS:

161, for a revolving flume stream type filter.

174, for a movable cylindrical filter having comminuting means.

210+, and 217, for a drum type separator having means to add a treating material.

326, for plural drums on parallel axes.

SEE OR SEARCH CLASS 162, Paper Making and Fiber Liberation,

323+, and 357 for cylinder mold type paper making machines.