US PATENT SUBCLASS 210 / 278
.~.~.~.~ Multi-way valve unit

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

263  DF  PARTICULATE MATERIAL TYPE SEPARATOR, E.G., ION EXCHANGE OR SAND BED {13}
269  DF  .~ With rehabilitation means {6}
275  DF  .~.~ Backwash or blowback means {3}
277  DF  .~.~.~ Flow controller external of closed casing {1}
278.~.~.~.~ Multi-way valve unit

DEFINITION

Classification: 210/278

(under subclass 277) Apparatus in which a single valve controls communication with three or more flow lines.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424+, for a filter with a multiway valve.

SEE OR SEARCH CLASS

137, Fluid Handling,

625+, for multiway valves, per se.