Fan impeller and heat dissipating device incorporating the same
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United States of America Patent
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Aug 17, 2010
Grant Date -
Dec 17, 2009
app pub date -
Dec 1, 2008
filing date -
Jun 13, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A heat dissipation device (1) includes an electric fan (20) and a heat sink (10). The fan includes a fan impeller (40) which includes a hub (41) and a plurality of blades (42) extending radially and outwardly from the hub (41). The hub (41) includes an upper portion (417) and a bottom portion (413). An air inlet (411) is formed near the upper portion (417) and an air outlet (412) is formed near the bottom portion (413). The blades (42) have portions on the bottom portion of the hub which are extended toward a center of the air outlet for driving more air to the center of the air outlet (412), whereby more air can flow to a center of the heat sink.
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