Double chainring drivetrain
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United States of America Patent
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Dec 10, 2013
Grant Date -
Nov 8, 2012
app pub date -
May 2, 2011
filing date -
May 2, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A double chainring drivetrain system for bicycles that allows riders to apply force directly to a pair of chainrings, one on either side of the bottom bracket. The double chainring drivetrain system has two crank arms, each connected to a peripheral rim portion of the chainrings, and two drive chains. A hub on the rear wheel has two sprockets such that the two drive chains extend between the chainrings and the rear sprockets for transfer of applied rotational forces from the pedals on either side of the bicycle through the two chainrings to the rear sprockets on hub of the rear wheel.
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