Patent ID: 7192254

Claim:
A radial fan having an axial fan blade configuration, comprising: a substantially cylindrical hub which comprises a hollow with a spindle at a center of said hollow, a curved guiding part located along the edge of a first end surface of said hub, and an extending part directly connected to an edge of a second end surface of said hub; a first set of blades having a plurality of first blades extending outwardly from a side surface of said hub; and a second set of blades having a plurality of second blades located on said extending part, wherein said second set of blades is located around an outside of said first set of blades and said second set of blades includes a ring connected to said plurality of second blades; and wherein each of the plurality of second blades is spaced apart an equal distance from an adjacent second blade of the plurality of second blades forming an equally spaced gap there between, wherein said plurality of first blades are spaced apart from said extending part, said ring, and said plurality of second blades.