US PATENT SUBCLASS 210 / 391
.~.~ With cleaning means

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

348  DF  FILTER {25}
359  DF  .~ Movable medium {12}
391.~.~ With cleaning means {5}
392  DF  .~.~.~> Fixed position or attached valve blocking means
393  DF  .~.~.~> Backwash or blowback and additional cleaner
394  DF  .~.~.~> Discharging inside, e.g., internal-type drum
395  DF  .~.~.~> With filter-driven valve means
396  DF  .~.~.~> Solid cleaner, e.g., scraper {1}

DEFINITION

Classification: 210/391

(under subclass 359) Apparatus having means for removing residue.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107, for flow, fluid pressure or material level responsive cleaning movement of a filter medium.

158, for a movable flume stream type strainer with cleaning means.

216+, for moving filter medium and means for adding a treating material.

369+, for a centrifugal extractor with residue removing means. 386, for rolls or confining members which may act as residue removers.

399, for a movable casing which may clean by merely reversing the casing position.

407, for residue remover for a fixed filter medium and see the search notes.

SEE OR SEARCH CLASS

162, Paper Making and Fiber Liberation,

274+, for paper making apparatus having means to clean or condition a porous or foraminous member.