US PATENT SUBCLASS 137 / 888
.~.~ Combining by aspiration

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

561 R  DF  SYSTEMS {32}
602  DF  .~ Multiple inlet with single outlet {4}
888.~.~ Combining by aspiration {5}
889  DF  .~.~.~> Combining of three or more diverse fluids
890  DF  .~.~.~> Plural motivating fluid jets
891  DF  .~.~.~> Flow control by varying position of a fluid inlet relative to entrainment chamber
892  DF  .~.~.~> With selectively operated flow control means in inlet {1}
895  DF  .~.~.~> With condition responsive valve

DEFINITION

Classification: 137/888

Combining by aspiration:

(under subclass 602) System in which a fluid flowing from a first inlet flow line causes or facilitates the flow of a fluid from a second inlet flow line so that the fluids are combined prior to leaving the single outlet or exhaust passage, the fluid flowing from the first inlet flow line serves as the motivating or aspirating fluid while the fluid in the second inlet flow line serves as the aspirated fluid;

whereby, the motivating or aspirating fluid imparts energy to the aspirated fluid by the action of entrainment.

(1) Note. In regard to the classification of an aspirator between Class 417, Pumps, and this class (137), subclasses 888+, and aspirator in which the disclosed function is to mix or combine together two or more fluids is classified in Class 137, whereas an aspirator in which the sole disclosed function is to pump one fluid by means of entrainment with another is classified in Class 417. In the case of dual disclosed functions, if an aspirator has a disclosed function of pumping one fluid by entraining it with another and a disclosed function of mixing or combining together two or more fluids to produce a mixture, the classification is in Class 137.

SEE OR SEARCH THIS CLASS, SUBCLASS:

101.11, 205.5, and 564.5, for mixing or combining of fluids in which one fluid is added to another by means of differential pressure existing along a main line which has a shunt line leading to a reservoir containing a fluid to be added to the main line downstream of the shunt line; many of these devices may include an aspirating effect.

268, for devices including a holder for solid, flaky, or pulverized material to be dissolved or entrained.

896+, for mixing or combining of plural fluids by means other than aspiration.

SEE OR SEARCH CLASS 222, Dispensing,

129+, for dispensers comprising plural sources which may also have a common discharge, and particularly indented subclasses 145.1+ for dispensers comprising plural sources having a common discharge.

239, Fluid Sprinkling, Spraying, and Diffusing,

310+, 335+, 337+, and 398+ for spraying devices having additional means to promote mixing of a plurality of different streams.

261, Gas and Liquid Contact Apparatus, appropriate subclasses for apparatus for mixing a liquid with a gas.

366, Agitating, appropriate subclasses for devices adapted to promote mixing of plural fluent materials by means other than aspiration.

417, Pumps, appropriate subclasses for aspirators having a sole disclosed function of pumping of one fluid by entrainment with another, and see Note (1) above.