US PATENT SUBCLASS 137 / 808
.~ Means to cause rotational flow of fluid (e.g., vortex generator)

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

803  DF  FLOW AFFECTED BY FLUID CONTACT, ENERGY FIELD OR COANDA EFFECT (E.G., PURE FLUID DEVICE OR SYSTEM) {11}
808.~ Means to cause rotational flow of fluid (e.g., vortex generator) {4}
809  DF  .~.~> Plural vortex generators
810  DF  .~.~> Vortex generator as control for system
811  DF  .~.~> Vortex generator in interaction chamber of device
812  DF  .~.~> By tangential input to axial output (e.g., vortex amplifier) {1}

DEFINITION

Classification: 137/808

(under subclass 803) Device or system provided with means to compel any of the streams of fluid to turn about an axis in a generally circular (i.e., "vortex") path.

(1) Note. The "means to compel" referred to above is usually a circular or elliptical interior wall of a chamber through which the fluid stream passes, but may also comprise a helical or spiral passage for the fluid.