Patent ID: 6700264
Filing Date: 2004-03-02
Classification: H02K

Abstract:
A pump driving system of induction type, comprising:a first shaft rotatably mounted on a support housing; a second shaft rotatably mounted on a pump housing; a first magnetization body mounted on said first shaft and being integrally rotated with said first shaft; a nonmagnetically electrical-conducting body mounted on either said first [shaft] magnetization body or said second shaft; a seal cover provided at one end of said second shaft and having a circular plate portion that is made of electrical-insulated material; and means for providing and changing magnetic flux to pass through sad first magnetization body, said means being actuated by said first shaft to change the magnetic flux passing through said first magnetization body to have said nonmagnetically electrical-conducting body induced with an eddy current so as to rotate said second shaft by way of electromagnetic interaction of the eddy current and the magnetic field of the magnetic flux.