MAGNET GEAR DEVICE
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United States of America Patent
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Issued Date -
Mar 11, 2021
app pub date -
Jun 29, 2020
filing date -
Sep 9, 2019
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Abstract
A magnet gear device includes a first magnet unit in which two or more magnetic poles are alternately arranged in a direction along a rotation axis and a circumferential direction with respect to the rotation axis, respectively; a second magnet unit in which two or more magnetic poles are alternately arranged in the direction along the rotation axis and the circumferential direction, respectively, wherein the second magnet unit is disposed radially outside the first magnet unit; and a pole piece unit including a plurality of pole pieces to form a magnetic flux path between the first magnet unit and the second magnet unit. Each of the plurality of pole pieces is formed to extend in a radial direction to allow each of both an inner end and an outer end thereof to overlap at least a portion of the first magnet unit and the second magnet unit.
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