Patent ID: 6736610
Filing Date: 2004-05-18
Classification: A01M,B05B

Abstract:
A blower fan, in particular for blowing apparatuses, comprising:a support element (13) presenting a first face (13a) and a second face (13b) mutually opposite to said first face (13a), said first and second faces (13a, 13b) being respectively invested at least by a first and a second air flows (10, 11) coming from mutually opposite directions, said support element (13) being radially delimited at a predetermined maximum radial distance; a first blade series emerging from said first face (13a) or from said second face (13b); a second blade series emerging from said first face (13a) or from said second face (13b); at least one air passage (13c) provided in the support element (13) and defined at a perimetral edge (15b) located in the support element (13) at a radial distance inferior than said predetermined maximum radial distance, said at least one air passage (13c) being adapted to direct at least said first air flow (10) investing said first face (13a) at least partly through said support element (13); and a third blade series emerging from at least one of said first face (13a) and said second face (13b), said third blade series being geometrically different from at least one of said first blade series and said second blade series.