US PATENT SUBCLASS 494 / 78
.~.~.~ And at least one element having other-than-circular periphery

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

43  DF  ROTATABLE BOWL {16}
76  DF  .~ Including plurality of axially-extending, tubular elements located within vertically-oriented bowl {1}
77  DF  .~.~ Each element concentric with axis of bowl {1}
78.~.~.~ And at least one element having other-than-circular periphery

DEFINITION

Classification: 494/78

And at least one element having other-than-circular periphery:

(under subclass 77) Apparatus wherein one or more of the elements describes, in horizontal section, something other than a mere circle.

(1) Note. The formation of the sidewall of an element in such a manner as to show, in plan, a periphery which comprises peaks and valleys, or the like, often is done for the purpose of increasing the surface area of the element.