US PATENT SUBCLASS 209 / 725
.~.~.~ Rotational hydrodynamic extraction (e.g., unidirectional hydrocyclone, vortical, whirlpool, 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.~.~.~ Rotational hydrodynamic extraction (e.g., unidirectional hydrocyclone, vortical, whirlpool, etc.) {2}
726  DF  .~.~.~.~> Including condition responsive control
727  DF  .~.~.~.~> Including oppositely directed axial flows around evacuated core (e.g., hydrocyclone having reverse free-vortexes formed, etc.) {5}

DEFINITION

Classification: 209/725

Rotational hydrodynamic extraction (e.g., unidirectional hydrocyclone, vortical, whirlpool, etc.):

(under subclass 208) Methods and apparatus wherein a liquid suspension of material is caused to circulate about an axis creating sufficient centrifugal or centripetal forces to promote deposition of entrained or suspended material into respective grades or classes of solids.

(1) Note. Gravitational sedimentation from a circularly moving liquid suspension of material is included herein.

(2) Note. See (1) Note in Class 209 subclass 155.

SEE OR SEARCH THIS CLASS, SUBCLASS:

12.1+, for a combination of diverse types of separating operations including a liquid suspension separating operation.

208, for gravitational sedimentation from a linearly flowing liquid suspension of material.

210, wherein a mechanical deflector promotes the circulation of the liquid suspension. 422+, for methods and apparatus wherein one or more materials of liquid suspension of materials settles as a layer or layers. See (2) Note in Class 209 subclass 132.

710+, for analogous subject matter involving gaseous suspension separations including plural, individual and distinct, interconnected separating means. See (1) Note in Class 209 subclass 155.

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

SEE OR SEARCH CLASS

95, Gas Separation: Processes,

267+, for analogous methods for indiscriminate removal of solids from gaseous suspension. See (3) Note in Class 209 subclass 132.

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

132,.

210, Liquid Purification or Separation,

787+, for processes 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.

494, Imperforate Bowl: Centrifugal Separators, appropriate subclasses wherein centrifugal force is generated by rapid rotation of a vessel containing liquid suspension.