US PATENT SUBCLASS 209 / 733-- .~.~.~.~.~ Including specific underflow discharge feature (e.g., apex construction, secondary vortex chamber, etc.)

US PATENT SUBCLASS 209 / 733
.~.~.~.~.~ Including specific underflow discharge feature (e.g., apex construction, secondary vortex chamber, 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}
733		.~.~.~.~.~ Including specific underflow discharge feature (e.g., apex construction, secondary vortex chamber, etc.)

DEFINITION

Classification: 209/733

Including specific underflow discharge feature (e.g., apex construction, secondary vortex chamber, etc.):

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

(1) Note. A mere recitation of an underflow discharge without any further attribute is not proper for classification in this subclass.

(2) Note. The inclusion of secondary fluid acting upon the underflow discharge is not proper for classification in this subclass but rather belongs in subclass 731.

SEE OR SEARCH THIS CLASS, SUBCLASS:

731, see (2) Note above.

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,.