Linear to rotary drive system for bicycles and similar vehicles
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United States of America Patent
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Jul 10, 2012
Grant Date -
N/A
app pub date -
Jan 11, 2010
filing date -
Jan 11, 2010
priority date (Note) -
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Abstract
A drive system for a bicycle includes first and second drive sprockets, with respective one-way clutches. The drive sprockets are mounted on opposite ends of the bike's drive shaft. First and second idler pulleys are mounted on an upper pulley shaft. The upper pulley shaft mounts on the bike's frame above the rotary drive shaft and at a right angle thereto. A chain is mounted on the drive sprockets and the idler pulleys. A first pedal is attached to the chain between the first drive sprocket and the first idler pulley. A second pedal is attached to the chain between the second linear drive sprocket and the first linear driven idler pulley. First and second linear chain guides are mounted on opposite sides of the frame and disposed next to the chain for guiding portions of the chain and the pedals as they are moved up and down on the bicycle.
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