Axial fan

Details Axial fan Axial fan

2005-07-05

2008-09-09

Edgar, Richard (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Cantilever blade

C416SDIG004

Reexamination Certificate

active

07422420

ABSTRACT:
An axial fan (1) rotating in a plane (XY) about an axis (2) comprises a central hub (3), a plurality of blades (4), which have a root (5) and a tip (6), the blades (4) being delimited by a convex leading edge (7) and by a concave trailing edge (8), their projections in the fan rotation plane each being formed by circular arc segments; the blades (4) are made from sections with aerodynamic profiles, each with decreasing length and more curved from the perimeter to the hub.

REFERENCES:
patent: 6554574 (2003-04-01), Spaggiari
patent: 6558123 (2003-05-01), Spaggiari
patent: 7273354 (2007-09-01), Spaggiari
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patent: 0 704 626 (1996-04-01), None
patent: 0 945 625 (1999-09-01), None

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