US PATENT SUBCLASS 494 / 71
.~.~.~.~ And the plurality divided vertically into two or more, physically separate or functionally distinct groups

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

43  DF  ROTATABLE BOWL {16}
67  DF  .~ Including structure located within vertically-oriented bowl and extending outwardly from central region (e.g., axis) thereof {2}
68  DF  .~.~ Comprising plurality of elements, each concentrically encircling axis of bowl and spaced therealong {2}
70  DF  .~.~.~ Each extending away from region with significant downward, as well as significant outward, component (e.g., nested cones) {3}
71.~.~.~.~ And the plurality divided vertically into two or more, physically separate or functionally distinct groups

DEFINITION

Classification: 494/71

And the plurality divided vertically into two or more, physically separate or functionally distinct groups:

(under subclass 70) Apparatus wherein the plurality of elements comprise at least two groups of elements, one above another, and wherein the manner in which the groups can be differentiated may lie either (a) in the fact that one group is spaced from another group or (b) in the fact that one group plays a somewhat different role (e.g., is utilized at a different time) in the separating function than does another group.