Cooling fan
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United States of America Patent
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Jan 1, 2013
Grant Date -
Mar 18, 2010
app pub date -
Dec 5, 2007
filing date -
Dec 11, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A cooling fan of the present invention includes: a bottomed cylindrical boss portion; and a plurality of blades provided on an outer circumferential surface of the boss portion, the blades radiating in a radial direction, in which a ring member for connecting the blades with each other is provided on a side radially inner from tips of the blades. According to the present invention, it is possible to provide a cooling fan capable of preventing the worsening of the noise characteristic and also of enhancing the versatility even if the blades are made thinner.
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