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Permanent magnetic retaining device to move, affix or carry ferromagnetic parts or loads with electronic switching of the magnetic flux to release the carried load

  • US 4,965,695 A
  • Filed: 05/20/1988
  • Issued: 10/23/1990
  • Est. Priority Date: 05/22/1987
  • Status: Expired due to Fees
First Claim
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1. A permanent magnet retaining device to move, affix or carry ferromagnetic parts or loads comprising:

  • a central iron core;

    a pair of magnet blocks enclosing said central iron core;

    a plurality of iron shoes connected to said magnet blocks and functioning to secure said magnet blocks;

    a plurality of reinforcing plates connected to said magnet blocks;

    two lateral poles connected respectively to said pair of magnet blocks and spaced away from said central iron core;

    a sliding cover situated above both of said poles and having a lifter eyelet;

    a pair of guide pins on which said sliding cover moves;

    a plurality of mechanical force gauges respectively located adjacent to said guide pins;

    an overcover surrounding said two lateral poles;

    an electronic control circuit situated in a side wall of said overcover;

    a sensor located remotely from said electronic control circuit, said sensor functioning to receive information from said plurality of mechanical force gauges and functioning to transmit information to said electronic control circuit; and

    at least one compensator coil, one of said at least one compensator coils being situated on top of one of said two lateral poles.

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