DUAL PULLEY CHAIN GUIDE AND GUARD
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United States of America Patent
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Issued Date -
Jun 7, 2012
app pub date -
Dec 2, 2011
filing date -
Dec 2, 2010
priority date (Note) -
Abandoned
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Abstract
A chain guide having a mounting bracket mounted to the bottom bracket shell with multiple coaxial pulleys, each of which is in substantially planar alignment with one chainring of a crank with two or more chainrings. Each pulley cog engages the bicycle chain when the chain is on a corresponding chainring. One of the pulley cogs can be replaced by a roller mounted to the bracket coaxially with the first pulley cog and in substantially planar alignment with the corresponding chainring.
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