Automatic mechanically controlled continuously-variable-ratio drive
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United States of America Patent
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Feb 6, 2007
Grant Date -
Apr 29, 2004
app pub date -
Oct 22, 2003
filing date -
Oct 25, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A continuously-variable-ratio drive, having an input shaft; a flywheel integral with the input shaft; a drive pulley idle with respect to the input shaft and defined by two half-pulleys defining a groove of variable size for a V belt; and a centrifugal control assembly. The control assembly has a centrifugal actuating device which intervenes above a first threshold value of the angular speed of the input shaft to connect the drive pulley angularly to the flywheel by means of a friction clutch; and a speed adjusting device which is active over a second threshold value of the angular speed of the input shaft to adjust the size of the groove of the drive pulley and therefore the work diameter of the belt.
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