Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Patent
1980-09-18
1982-11-09
Richter, Sheldon J.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
123 4149, 165 51, 165121, 415DIG1, F28F 1306
Patent
active
043582451
ABSTRACT:
A low noise, axial flow fan particularly suited for use in a turbulent air flow such as the flow exiting an automobile radiator has a band that is secured to the outer ends of the fan blades. The blades are highly forwardly skewed and have an increasing blade angle as a function of blade radius over at least the outer portions of the blade. Each blade is secured to the band along its full width. In the preferred form, the band has a cross-sectional shape that acts as a nozzle to accelerate the airflow through the fan, each blade has a cambered, airfoil cross-section, and the entire fan is formed of an injection molded plastic as a single, integral structure.
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Bolt Beranek and Newman Inc.
Richter Sheldon J.
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