Patent ID: 6267058
Filing Date: 2001-07-31
Classification: B60V,B61B,B61C,B65G

Abstract:
A magnetically coupled drive apparatus comprising:a wall made of a non-metallic, nonmagnetic material; anda first magnetic coupler and a second magnetic coupler disposed on opposite sides of the wall, the first magnetic coupler being movable relative to the wall in a direction of movement, the second magnetic coupler being magnetically coupled with the first magnetic coupler to be moved by the first magnetic coupler, the first magnetic coupler including a first magnetic bar and a plurality of first magnetic blocks coupled to the first magnetic bar, the first magnetic blocks being disposed between the first magnetic bar and the wall, the first magnetic bar being opposite in polarity from the first magnetic blocks, the first magnetic blocks being arranged in series and being alternately spaced by a plurality of first nonmagnetic spacers in the direction of movement, the second magnetic coupler including a second magnetic bar and a plurality of second magnetic blocks coupled to the second magnetic bar, the second magnetic blocks being disposed between the second magnetic bar and the wall, the second magnetic bar being opposite in polarity from the second magnetic blocks, the second magnetic blocks being arranged in series and being alternately spaced by a plurality of second nonmagnetic spacers in the direction of movement, the second magnetic bar being the same in polarity as the first magnetic bar.