CYLINDRICAL PERMANENT MAGNETIC COUPLING DEVICE
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United States of America Patent
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Issued Date -
Mar 12, 2015
app pub date -
Aug 1, 2014
filing date -
Sep 6, 2013
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Abstract
A cylindrical permanent magnetic coupling device includes a conductor rotor and a permanent magnet rotor. The conductor rotor includes a bottom and a sidewall surrounding the bottom for defining a cavity, in which the cavity includes at least two different inner diameters. The permanent magnet rotor is arranged in the cavity for providing at least two different air gaps between the conductor rotor and the permanent magnet rotor.
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