US PATENT SUBCLASS 210 / 389
.~.~.~ Longitudinally moving prefilt 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}
388  DF  .~.~ Vibrating or longitudinally reciprocating {1}
389.~.~.~ Longitudinally moving prefilt type

DEFINITION

Classification: 210/389

(under subclass 388) Apparatus in which the prefilt is fed in at one point of a filter medium, usually one end, and moves along it.