Continuously variable planetary gear set
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United States of America Patent
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Apr 3, 2007
Grant Date -
Jun 23, 2005
app pub date -
Feb 3, 2005
filing date -
Aug 11, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A continuously variable planetary gear set is described having a generally tubular idler, a plurality of balls distributed radially about the idler, each ball having a tiltable axis about which it rotates, a rotatable input disc positioned adjacent to the balls and in contact with each of the balls, a rotatable output disc positioned adjacent to the balls opposite the input disc and in contact with each of the balls such that each of the balls makes three-point contact with the input disc, the output disc and the idler, and a rotatable cage adapted to maintain the axial and radial position of each of the balls, wherein the axes of the balls are oriented by the axial position of the idler.
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