High efficiency cooling fan
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United States of America Patent
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Dec 25, 2012
Grant Date -
Sep 18, 2008
app pub date -
Mar 3, 2008
filing date -
Mar 5, 2007
priority date (Note) -
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Abstract
A cooling fan includes an impeller which comprises a plurality of radially extending blades, each of which includes a blade hub, a blade tip and a blade midspan approximately midway between the hub and the tip. In addition, each blade includes a camber of between about 60° and 90° at the blade hub, between about 15° and 40° at the blade midspan and between about 15° and 40° at the blade tip.
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