Method of formation of impeller with shape defined by plurality of lines and such impeller
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United States of America Patent
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Aug 16, 2016
Grant Date -
Jul 10, 2014
app pub date -
Jan 3, 2014
filing date -
Jan 9, 2013
priority date (Note) -
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Abstract
An impeller (10) where each of the blades (34) includes a first part (14) which is positioned at a base end side of the hub (5) and a second part (24) which is positioned at a distal end side of the hub, the first part being formed by connecting a first hub surface curve (12) which extends along a hub surface of the hub and a first shroud surface curve (11) which extends along a shroud surface of the blade by a first group of lines (13), and the second part is formed by connecting a second hub surface curve (22) which extends along a hub surface of the hub and connects with the first hub surface curve and a second shroud surface curve (21) which extends along the shroud surface and connects with the first shroud surface curve by a second group of lines (23).
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