Patent ID: 6416300
Filing Date: 2002-07-09
Classification: F04D

Abstract:
A cooling fan structure comprising:a fixed base seat on which a stator assembly is mounted, a central section of said base seat having an anti-abrasion first contact section, said base seat having a first annular section positioned substantially parallel to said central section, said first annular section having a first air bearing annular face; and, a vane assembly rotationally driven by said stator assembly, said vane assembly having a magnetic section, a central portion, multiple vanes, and a second annular section, said central portion having an anti-abrasion second contact section, said second annular section corresponding to said first annular section and having a second air bearing annular face, wherein said first contact section and said second contact section contact one another at a single point with a gap formed between said first air bearing annular face of said first annular section and said second air bearing annular face of said second annular section, said gap having a width between 5 and 40 micrometers, said gap serving as an air film to achieve an air bearing effect when said vane assembly rotates.