Low-noise, high-performance fan

Details Low-noise, high-performance fan Low-noise, high-performance fan

1998-12-21

2000-07-11

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416243, 416DIG2, 416DIG5, 415119, B63H 126

Patent

active

060863307

ABSTRACT:
The present invention provides a fan (100) that includes a hub (102) and a plurality of blades (104). The hub (102) has a blade attachment surface (106) that extends around the circumference of the hub (102). The blades (104) extend from the blade attachment surface (106). Each of the blades (104) has a blade tip (108) distal from the blade attachment surface (106) and a chord length (110) defined as the width of the blade (104). Each blade (104) includes a hub chord length (112) defined as the chord length of the blade (104) at the blade attachment surface (106) and a tip chord length defined as the chord length at the blade tip (108). The relationship of the chord length to the blade radius is defined as the area bounded by the following equations:

REFERENCES:
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patent: 5393199 (1995-02-01), Alizadeh
patent: 5564901 (1996-10-01), Moore
patent: 5577888 (1996-11-01), Capdevilla et al.
patent: 5681145 (1997-10-01), Neely et al.

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