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Magnetic anchoring apparatus with quadrangular pole arrangement

  • US 4,507,635 A
  • Filed: 11/15/1983
  • Issued: 03/26/1985
  • Est. Priority Date: 11/16/1982
  • Status: Expired due to Term
First Claim
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1. Magnetic anchoring apparatus, comprising in combination:

  • an external ferromagnetic crown provided with a base plate and lateral walls;

    at least one group of four pole pieces defining pairs of corresponding poles of an anchoring surface, said pole pieces presenting their longitudinal axes arranged at right angles to the base plate and in correspondence with the apexes of a square;

    the apparatus comprises moreover a plurality of permanent magnets for feeding the aforesaid poles, interposed between the pole pieces and, respectively, between the latter and the ferromagnetic crown, the arrangement of the magnets, for each pole piece, being such as to have a main magnet, axially aligned with the pole piece, which provides a first magnetic flux value, as well as laterally arranged secondary magnets which surround the pole piece, and whose axes of magnetization are arranged perpendicular to the axis of the pole piece itself, said secondary magnets together providing a magnetic flux substantially equal to the flux of the main magnet.

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