US PATENT SUBCLASS 210 / 292
.~.~ Hood or top protector type

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}
291  DF  .~ Particular liquid receiving means or foraminous bed retainer {2}
292.~.~ Hood or top protector type

DEFINITION

Classification: 210/292

(under subclass 291) Apparatus in which the liquid distributing means is provided with (1) an imperforate cap or hood extending around or over it, or (2) caps or hoods over openings in the distributor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

118, for a sand valve, i.e., nonclosing check valve associated with a sand bed.

456, for a filter with prefilt flow director or distributor.