US PATENT SUBCLASS 209 / 732
.~.~.~.~.~ Including specific overflow discharge feature (e.g., adjustable vortex finder, shape, size, etc.)

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

132  DF  FLUID SUSPENSION {2}
155  DF  .~ Liquid {5}
208  DF  .~.~ Grading deposition {4}
725  DF  .~.~.~ Rotational hydrodynamic extraction (e.g., unidirectional hydrocyclone, vortical, whirlpool, etc.) {2}
727  DF  .~.~.~.~ Including oppositely directed axial flows around evacuated core (e.g., hydrocyclone having reverse free-vortexes formed, etc.) {5}
732.~.~.~.~.~ Including specific overflow discharge feature (e.g., adjustable vortex finder, shape, size, etc.)

DEFINITION

Classification: 209/732

Including specific overflow discharge feature (e.g., adjustable vortex finder, shape, size, etc.):

(under subclass 727) Methods and apparatus having details of the passage formation for egress of lighter or smaller material carried in an inner spiraling current.

(1) Note. A mere recitation of an overflow discharge without further attribute is not proper for classification in this subclass. However, the mere naming of a further attribute is sufficient to attain classification in this subclass; e.g., a named "vortex finder" is not proper for classification in this subclass whereas a named "adjustable vortex finder" is properly classified in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

721, for analogous subject matter involving gaseous suspension separation. See (1) Note in Class 209 subclass 155.

SEE OR SEARCH CLASS

55, Gas Separation, appropriate subclasses, for analogous subject matter for indiscriminate removal of solids from a gaseous suspension. See (3) Note in Class 209

132,.

210, Liquid Purification or Separation, appropriate subclasses, for indiscriminate removal of solids from a liquid suspension. See (3) Note in Class 209 132,.