US PATENT SUBCLASS 494 / 52
.~.~ Rotatably driven coaxially with bowl, but differing as to direction or speed

Current as of: June, 1999
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494 /   HD   IMPERFORATE BOWL: CENTRIFUGAL SEPARATORS

43  DF  ROTATABLE BOWL {16}
50  DF  .~ Including driven material-moving means therein {2}
52.~.~ Rotatably driven coaxially with bowl, but differing as to direction or speed {2}
53  DF  .~.~.~> Including element having helical blade {1}
55  DF  .~.~.~> Including plurality of discrete pushing or scraping elements moving proximate to material collecting surface of bowl

DEFINITION

Classification: 494/52

Rotatably driven coaxially with bowl but differing as to direction or speed:

(under subclass 50) Apparatus wherein the driven means is one which is rotated about an axis, and wherein that axis coincides with the axis of rotation of the member, and further wherein the means is driven in a direction, or at a speed, which differs from the direction, or the speed, of the member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44, for a separator wherein the rotatable bowl comprises a plurality of bowls which are located partly or wholly within one another and wherein at least one of the bowls may be driven relative to at least one other bowl; also, see the reference to this subclass (52) appearing in (2) Note thereof.