Patent ID: 6893230

Claim:
A heat-dissipation fan, comprising: a. a rotor, further comprising a permanent magnet surrounding the center of said rotor, a case surrounding said magnet, a plurality of fan blades radiating outwardly from said case, and a hollow tubular bearing, fixedly and concentrically mounted to said rotor; b. a base member of said fan, further comprising a case in which said fan is mounted, a stator coil wound around the center of said base member which generates magnetic forces when said fan is in operation, a means for energizing said coil when said fan is in operation and a hollow turbular bearing fixedly mounted to said fan base, said bearing mounted in such a position on said fan base, so as to form a linear tubular opening when said fan rotor is placed next to said fan base for normal fan operation; c. a cylindrical axial tube of sufficient length to fit through the bearing mounted to said rotor and the bearing mounted to said fan base, with sufficient excess length to allow the end of said axial tube to protrude form said fan base when the other end of said axial tube is placed loosely against the bearing mounted to said fan rotor; and d. a retaining ring placed around said axial tube at the end of said axial tube which protrudes from said fan base.