Patent ID: 6854777

Claim:
A magnetic lifting machine comprising: a pair of polarity plates ( 10 ) disposed to be opposite each other to form side walls of the machine and having a non-magnetic medium ( 11 ) in the longitudinal center thereof and magnetic members ( 12 ) on both sides of the non-magnetic medium ( 11 ); a cylindrical rotor ( 20 ) axially supported to be rotatable between the polarity plates ( 10 ); a pair of neodymium magnets ( 30 ) inserted in the rotor ( 20 ) and having N/S magnetic poles opposite to each other; a pair of fixed magnets ( 50 ) in the vicinity of the rotor ( 20 ); a shaft ( 90 ) supporting the rotor ( 20 ); and thin anti-exfoliation plates ( 40 , 41 , 42 or 43 ) made of non-magnetic material and fitted to both sides of the rotor ( 20 ) to prevent the neodymium magnets ( 30 ) coated with antioxidant film from being exfoliated.