Centrifugal fan and impeller thereof

Details Centrifugal fan and impeller thereof Centrifugal fan and impeller thereof

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

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