Sprocket With 1.5 Order, and Multiples Thereof, Vibration Canceling Profile and Synchronous Drive Employing Such a Sprocket
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United States of America Patent
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Issued Date -
Aug 21, 2008
app pub date -
Oct 21, 2005
filing date -
Oct 22, 2004
priority date (Note) -
Abandoned
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Abstract
A vibration canceling rotor and a synchronous drive employing such rotors is provided wherein 1.5 order vibrations in the synchronous drive can be reduced by employing the vibration canceling rotor on a rotating member of the synchronous drive that rotates at one half the speed of another rotating member of the drive. To cancel 1.5 order vibrations, the rotor has a three-lobed non-circular radial profile to engage the continuous-loop elongate drive structure of the synchronous drive. To cancel 1.5 order and .sup.3rd order vibrations, the rotor has a six lobed non-circular radial profile overlaid on the three lobed profile to create a non-circular composite profile to engage the continuous-loop elongate drive structure. The continuous-loop elongate drive structure can be a chain or a toothed belt.
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