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Electronically commutated motor driven apparatus

  • US 5,079,488 A
  • Filed: 08/22/1989
  • Issued: 01/07/1992
  • Est. Priority Date: 02/26/1988
  • Status: Expired due to Term
First Claim
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1. Apparatus for use in a cooling system to pump fluid through the cooling system, said apparatus comprising:

  • a housing having a continuous passage therethrough, the passage having an inlet and an outlet adapted to be connected in the cooling system;

    first means, located entirely within the passage in the housing and adapted to rotate within the passage in the housing, for moving fluid from the inlet to the outlet;

    means located entirely within the inlet and the outlet for supporting the first means for rotation about an axis coaxial with the inlet and the outlet;

    means for sensing the temperature of the fluid in the cooling system;

    second means secured to the exterior of the housing for applying an electromagnetic field through the housing to and around the first means thereby to rotate the first means and cause it to move fluid through the passage in the housing from the inlet to the outlet to pump fluid through the cooling system; and

    means, responsive to said temperature sensing means, for supplying electrical power to said second means.

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