US PATENT SUBCLASS 210 / 395
.~.~.~ With filter-driven valve 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  DF  .~.~ With cleaning means {5}
395.~.~.~ With filter-driven valve means

DEFINITION

Classification: 210/395

(under subclass 391) Apparatus in which flow of fluids is controlled by valve means actuated by the moving medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

142, for valves connected to a moving filter medium in combination with programming means.

390, for filter medium supported by and movable with a valve member.

392, for a fixed member operating valves attached to a moving filter unit.