Heat dissipation fan and rotor thereof
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United States of America Patent
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Oct 8, 2013
Grant Date -
Jul 28, 2011
app pub date -
Apr 1, 2010
filing date -
Jan 22, 2010
priority date (Note) -
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Abstract
A rotor includes a hub, rotary blades extending outwardly from the hub, and an annular wall surrounding the rotary blades. Each rotary blade includes a windward lateral surface and a leeward lateral surface at opposite sides thereof. The annular wall adjoins the outer ends of the rotary blades and is rotatable therewith. A perforation is defined in the annular wall between two neighboring rotary blades and adjacent to the leeward lateral surface of a leading rotary blade of the neighboring rotary blades.
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