Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing having tangential inlet or outlet
Reexamination Certificate
2011-08-30
2011-08-30
Look, Edward (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing having tangential inlet or outlet
C415S182100, C415S208100
Reexamination Certificate
active
08007232
ABSTRACT:
A centrifugal fan includes a fan frame (20) and an impeller (40) received in the fan frame. The impeller includes a hub (41) having a circular top wall (410) and a cylindrical side wall (412) extending downwardly from a rim of the circular top wall, a plurality of blades (42) extending radially from the side wall of the hub and a blade ring (44). The blade ring includes an annular top plate (441), a cylindrical sidewall (442) extending downwardly from an outer periphery of the top plate, and a flange (443) extending outwardly from a bottom of the cylindrical sidewall. The blade ring is arranged on top surfaces of the blades received in an air inlet (24a) defined in a top surface of the fan frame, and the top plate of the blade ring and the top surface of the fan frame are coplanar with each other.
REFERENCES:
patent: 7318703 (2008-01-01), Schober et al.
patent: 1241248 (2000-01-01), None
patent: 2508028 (2002-08-01), None
patent: 2697361 (2005-05-01), None
Hwang Ching-Bai
Zhang Jie
Zhao Zhi-Hui
Altis Law Group, Inc.
Foxconn Technology Co., Ltd.
Fu Zhun Precision Industry (Shen Zhen) Co. Ltd.
Look Edward
White Dwayne J
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