CRANK ARM ASSEMBLY AND RELATED CRANK ARM AND ELEMENT FOR TRANSMITTING TORQUE FROM THE CRANK ARM TO A BICYCLE CHAIN
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United States of America Patent
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Issued Date -
Dec 25, 2008
app pub date -
Apr 25, 2008
filing date -
Jun 19, 2007
priority date (Note) -
Abandoned
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Abstract
A crank arm assembly for a bicycle, comprising a crank arm and an element for transferring torque from the crank arm to a bicycle chain. The crank arm (and the element for transferring torque respectively comprise first and second front coupling means provided with respective matching profiles adapted to be coupled together to transfer torque from the crank arm to the element for transferring torque. In particular, the first and second means for transferring torque comprise respective front toothings, preferably Hirth toothings.
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