Centrifugal fans and impellers thereof

Details Centrifugal fans and impellers thereof Centrifugal fans and impellers thereof

2006-11-06

2009-11-10

Edgar, Richard (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Radially extending web or end plate

C416S203000, C029S889400

Reexamination Certificate

active

07614851

ABSTRACT:
A centrifugal fan is provided. A hub covers a driving device. An impeller surrounds the hub and includes a first blade set and a second blade set. The first blade set surrounds the hub and includes a first combining portion, a second combining portion, and a plurality of first blades. The first and second combining portions are respectively connected to the first blades. The second blade set includes a third combining portion, a fourth combining portion, and a plurality of second blades. The third and fourth combining portions are respectively connected to the second blades. The first blade set is assembled with the second blade set by assembling the first combining portion with the third combining portion and assembling the second combining portion with the fourth combining portion.

REFERENCES:
patent: 1156118 (1915-10-01), Warg
patent: 3285187 (1966-11-01), Anderson, Jr
patent: 5013215 (1991-05-01), Diehl
patent: 5611668 (1997-03-01), Yapp et al.
patent: 6508628 (2003-01-01), Amr
patent: 7390163 (2008-06-01), Clauson

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