发明名称 |
Apparatus for changing gear ratio in bicycles, especially in race bicycles |
摘要 |
Apparatus for changing bicycle gear ratios comprising pedals (1) to the shaft (3) of which a group of coaxial overdrive gears is fixed, with at least an overdrive gear (20) of larger diameter and at least an overdrive gear (2) of smaller diameter; a plurality of sprockets (4) of different diameter, pack-like disposed close to each other and mounted on the shaft (40) of the rear wheel; a roller chain for the transmission of motion from one of the overdrive gears (2; 20) to one of the sprockets (4); a mechanism for shifting the chain (5) from one to another of said sprockets (4), with a cyclist-operated lever-and-wire driving mechanism; and a mechanism for guiding the deviation of the chain (5) from one to the other of the overdrive gears (2; 20) in cooperation with the mechanism for shifting the chain (5) over the sprockets (4) of the rear wheel. The teeth of each overdrive gear exhibiting, in correspondence of a respective sector (M, N), reduced height and thickness with respect to the other teeth. The sectors (M, N) being angularly offset.
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申请公布号 |
US6022284(A) |
申请公布日期 |
2000.02.08 |
申请号 |
US19980149833 |
申请日期 |
1998.09.08 |
申请人 |
BARTOLOZZI, ATTILIO;BARTOLOZZI, ANDREA |
发明人 |
BARTOLOZZI, ATTILIO;BARTOLOZZI, ANDREA |
分类号 |
B62M9/10;(IPC1-7):F16H9/00;F16H7/22 |
主分类号 |
B62M9/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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