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ELECTRIC GEAR PUMP

  • US 20190323500A1
  • Filed: 12/14/2017
  • Published: 10/24/2019
  • Est. Priority Date: 12/22/2016
  • Status: Abandoned Application
First Claim
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1. An electric gear pump (4) comprising:

  • a gerotor (9) configured to rotate about an axis of rotation (A), the gerotor comprising an external spur rotor (21) and an internal spur rotor (22) arranged outside the external spur rotor (21);

    a stator (25) having electrical windings (26) arranged outside the internal spur rotor (22);

    at least one magnet (23) at least partially housed in the internal spur rotor (22) in such a way as to cause the gerotor (9) to rotate when the electrical windings (26) of the stator (25) are supplied with current;

    wherein;

    the internal spur rotor (22) comprises a cylindrical external surface (29) centered on the axis of rotation (A);

    the magnet (23) comprises an external surface (30) separated from the external surface of the internal spur rotor (22); and

    the external surface (30) of the magnet (23) is shaped in such a way as to define a constant radial distance (d) between the magnet (23) and the corresponding portion of the external surface (29) of the internal spur rotor (22).

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