发明名称 |
Front derailleur with annular chain guide, bicycle and method of operation |
摘要 |
A front derailleur including an annular chain guide for engagement and disengagement of a bicycle chain with multiple chain rings of a crankset. The annular chain guide may be positioned by linear guide rods. The annular chain guide may have an inner lifting surface and an outer pulling surface for engaging diametrically opposed corners of a chain when viewed in cross-section. The annular chain guide may have an opening defined by a polygon having at least five sides. The motion of the annular chain guide during a up-shift, i.e., displacement of the chain from a smaller chain ring to a next larger chain ring includes an upward, outward and rearward linear motion relative to a bicycle frame including upward force exerted by the annular chain guide against the chain. The motion of the annular chain guide during a down-shift is exactly opposite whereby the annular chain guide exerts a pulling down force against the chain.
|
申请公布号 |
US7025698(B2) |
申请公布日期 |
2006.04.11 |
申请号 |
US20020201849 |
申请日期 |
2002.07.23 |
申请人 |
WICKLIFFE CHRISTOPHER ALAN |
发明人 |
WICKLIFFE CHRISTOPHER ALAN |
分类号 |
F16H59/00;B62M9/134;B62M9/1342;B62M9/1346;B62M9/1348;B62M9/136;B62M9/137;F16H7/18;F16H7/22 |
主分类号 |
F16H59/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|