Patent ID: 7105967
Filing Date: 2006-09-12
Classification: F04D,F16C,H02K

Abstract:
1. A heat-dissipating device, comprising: a rotor having an impeller and a shaft; a base for supporting said rotor; a magnetic portion coupled to said shaft and said base, comprising: a first magnetic portion comprising a first magnetic ring, a second magnetic ring and a third magnetic ring, wherein the first magnetic ring is axially aligned with the second magnetic ring for generating an axial magnetic force between the rings, and the third magnetic ring is radially aligned with the second magnetic ring for generating a radial magnetic force between the rings; and a second magnetic portion comprising a first magnetic ring, a second magnetic ring and a third magnetic ring, wherein the first magnetic ring is axially aligned with the second magnetic ring for generating an axial magnetic force between the rings, and the third magnetic ring is radially aligned with the second magnetic ring for generating a radial magnetic force between the rings; and a bearing portion coupled to said shaft and said base for supporting said shaft upon rotation of said shaft.