US PATENT SUBCLASS 209 / 730
.~.~.~.~.~ Including auxiliary fluid (e.g., air or gas core, dilution water, elutriation liquid, 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}
730.~.~.~.~.~ Including auxiliary fluid (e.g., air or gas core, dilution water, elutriation liquid, etc.) {1}
731  DF  .~.~.~.~.~.~> Adjacent or subsequent to underflow discharge (e.g., dilution water, elutriation liquid, sedimentation chamber, sump, etc.)

DEFINITION

Classification: 209/730

Including auxiliary fluid (e.g., air or gas core, dilution water, elutriation liquid, etc.):

(under subclass 727) Methods and apparatus provided with a secondary fluid to facilitate the deposition of a select fraction of the liquid suspension.

(1) Note. The secondary fluid may be either gaseous or liquid.

(2) Note. The secondary fluid must be provided to enable or enhance the hydrodynamic extraction rather than merely operate as an input carrier fluid or as an output conveyance fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

724, for grading deposition of a liquid suspension employing a circularly flowing liquid separation agent. See (2) note thereunder.

SEE OR SEARCH CLASS

96, Gas Separation: Apparatus, 243+, for gas separation apparatus having gas and liquid contact means and subclasses 372+ for gas separation apparatus including inlet means for diverse gas or solid for gas treatment.

210, Liquid Purification or Separation,

787+, for process and subclasses 512.1+ for apparatus employing cyclonic or centrifugal force effects for indiscriminately removing solids from a liquid suspension. See (3) Note in Class 209 subclass 132.