Bicycle multiple chainwheel
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 28, 1992
Grant Date -
N/A
app pub date -
Jul 2, 1990
filing date -
Feb 15, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bicycle multiple chainwheel is provided which is mounted on a pedal crank for transmitting a rider's pedalling force to a rear gear through a chain. The chainwheel has the following configuration to prevent a chain from being locked to a diametrically larger sprocket or from prematurely disengaging from the larger sprocket before completely shifting to a diametrically smaller sprocket. The larger sprocket has circumferentially asymmetric teeth located in at least one of diametrically opposite angular regions which contain a diametrical line of the larger sprocket extending along crank arms of the pedal crank, each of the asymmetric teeth being offset relative to a corresponding pitch center in the forward rotational direction of the chainwheel in comparison with the other normal teeth of the larger sprocket.
First Claim
Other Claims data not available
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 25 Citation Count
- F16H Class
- 0 % this patent is cited more than
- 33 Age