Magnetic fan clutch having plastic members

  • US 6,331,743 B1
  • Filed: 08/04/1999
  • Issued: 12/18/2001
  • Est. Priority Date: 08/29/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A magnetically driven fan clutch comprising:

  • a plastic mount connected to a stationary part of a vehicle and having a central hub for the clutch;

    a first rotatable plastic member mounted for rotation and carrying an energizable magnetic field;

    bearings on the central hub mounting the first rotatable plastic members for rotation about the central hub;

    a series of coils mounted on the first rotatable plastic member for connection to an electrical source to be energized to provide the energizable magnetic field;

    a slip ring carried by the stationary mount for providing electrical connection to the rotatable series of coils;

    a second rotatable driven plastic member mounted for rotation relative to the first rotatable member;

    magnetic elements on the driven plastic member to be magnetically coupled to the energizable magnetic field to rotate the driven plastic member; and

    plastic fan blades mounted on the driven plastic member for being driven by a magnetic clutch formed by the energizable magnetic field and the magnetic elements.

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