Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Radially extending web or end plate
Reexamination Certificate
2008-07-15
2008-07-15
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Radially extending web or end plate
Reexamination Certificate
active
07399161
ABSTRACT:
A centrifugal fan includes a hub and an impeller. The impeller is composed of a plurality of blades mounted around an outer circumference of the hub. The paraxial side of the blade forms a backward leaning structure, while the non-paraxial side thereof forms a forward leaning structure. A chamfer structure also can be formed at a paraxial side of each blade to enlarge the air inlet of the fan. Each blade further includes a protrusion, which is located at a side opposite to the inlet and extends toward a center of the hub, to increase the airflow rate through the fan motor. The centrifugal fan further includes an anti-decompression cap connected to an inlet side of the impeller to prevent an axial flow of the intake air from decompression.
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Huang Wen-Shi
Kao Yu-Chien
Lin Kuo-Cheng
Lin Tsu-liang
Delta Electronics , Inc.
Hanan Devin
Look Edward K.
Muncy Geissler Olds & Lowe, PLLC
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