US PATENT SUBCLASS 210 / 424
.~.~.~ Multi-way valve

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

348  DF  FILTER {25}
418  DF  .~ With flow controller for material being treated {5}
420  DF  .~.~ Selective directive flow relative to filter {4}
424.~.~.~ Multi-way valve {1}
425  DF  .~.~.~.~> Backwash {1}

DEFINITION

Classification: 210/424

(under subclass 420) Apparatus including a multiway valve which may be adjusted to direct flow in different directions.