Centrifugal fan

Details Centrifugal fan Centrifugal fan

2007-05-15

2007-05-15

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Axially opposed working fluid paths to or from runner

Pump impeller means

C415S203000, C415S206000

Reexamination Certificate

active

10907275

ABSTRACT:
A centrifugal fan comprises an impeller, a motor which is connected and rotates the impeller and a housing which has an intake and an air blowing port for housing the impeller. The impeller has a plurality of blades arranged on a circumference. The intake opens opposed to the right end (in FIG.1) of the impeller. The air blowing port opens opposed to a side of the impeller. A gap enlarged portion, in which the distance between the outer circumference of the impeller and the inner face of the housing starts to increase at a point where the distance between the outer circumferential of the impeller and the surface of a nose portion is smallest therein, the nose portion being a region of the vicinity of an edge portion of the air blowing port, the edge portion being the closest side to the outer circumference of the impeller.

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patent: 2003-307196 (2003-10-01), None
patent: 2005-002918 (2005-01-01), None

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