Quiet clutch fan blade
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United States of America Patent
Stats
-
Jun 5, 1990
Grant Date -
N/A
app pub date -
Sep 15, 1989
filing date -
Sep 15, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A clutch fan has a new and unique blade design that results in quieter and more efficient operation. The blade design involves the leading edge having inner, intermediate, and outer regions such that the intermediate region is of increasing skew in the direction of rotation and the outer region is of decreasing skew. The pitch ratio increases as a function of increasing blade radius. Along the outer region, the blade increases in pitch on a defined curvature as a function of blade radius and angle to form a tip curl.
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Family
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Cited Art Landscape
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