Variable speed drive for a continuously variable transmission
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United States of America Patent
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-
Jul 7, 2009
Grant Date -
Jan 24, 2008
app pub date -
Jul 12, 2007
filing date -
Jan 15, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A variable speed drive for a continuously variable transmission includes a first transmission element that is rotatable about a first rotational axis and has a convexly-curved transmission surface that is rotationally symmetrical about a first rotational axis. A second transmission element is rotatable about a second rotational axis and has a concavely-curved transmission surface that is rotationally symmetrical about a second rotational axis parallel to the first rotational axis. The curved transmission surfaces face each other and a rigid transmission ring is positioned between and in contact with the curved transmission surfaces to transmit torque therebetween. The position of the ring on the curved surfaces is adjustable to vary the transmission ratio. The transmission surfaces are parallel to each other at least within the adjustment range of the transmission ring.
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