Spring-based mechanism for saving labor of a bicycle rider
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United States of America Patent
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Mar 9, 2010
Grant Date -
Apr 23, 2009
app pub date -
Oct 18, 2007
filing date -
Oct 18, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A spring-based mechanism for saving labor of a bicycle rider is disclosed and in one embodiment includes an axle operatively connected to a chain wheel and a first set of bearings via a gear assembly; a housing for mounting a shaft therein wherein the first set of bearings is provided at one end of the shaft; a second set of bearings provided at the other end of the shaft; a spring in the housing and having one end attached to one end of the shaft and the other end attached to the other end of the housing; and a clutch provided externally of the other end of the housing, the clutch being operatively connected to the second set of bearings and including a lock lever. The mechanism can store elastic force by counterclockwise pedaling and release the stored energy by disengaging a clutch from the mechanism when riding uphill.
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