Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hirotaka Higashimori0
Date of Patent
April 14, 2009
0Patent Application Number
110852450
Date Filed
March 22, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
On a suction surface side of a blade in an impeller, a convex portion is formed to assume a curved line from a front edge portion to a throat portion substantially in the middle in a radial direction, and this convex portion is formed to be flat assuming a curved line from the throat portion toward a rear edge portion, whereby this convex portion is formed in a position where a relative inlet velocity of fluid into the impeller is Mach number Ma≅1.
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