Power-assist system and method for bicycles
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United States of America Patent
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Dec 20, 2005
Grant Date -
Jul 4, 2002
app pub date -
Dec 28, 2001
filing date -
Dec 29, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A power-assist system for a bicycle by which the bicycle can be operated in various modes. There is a pedal-alone mode, a power-assist mode, a combined pedaling and power-assist mode, and a coasting mode. An overriding clutch is positioned between the pedal section and the sprocket, and a second overriding clutch is positioned between a speed reducing gear section, driven by a motor, and a power-assist shaft located in the crank housing.
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