US PATENT SUBCLASS 210 / 531
.~.~.~ Elevatable scrapers

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

513  DF  GRAVITATIONAL SEPARATOR {6}
523  DF  .~ Mechanical constituent mover {5}
528  DF  .~.~ Horizontally rotating scraper {3}
531.~.~.~ Elevatable scrapers

DEFINITION

Classification: 210/531

(under subclass 528) Apparatus in which the scraper is elevatable.