Bicycle sprocket
US6340338B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Sep 13, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M9/122
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A sprocket assembly for a bicycle is provides with at least one large sprocket and at least one small sprocket. The large sprocket is modified to allow a bicycle chain to move smoothly from the large sprocket to the small sprocket during an up shift operation. The large sprocket basically has a sprocket body with a first axial side and a second axial side, and a plurality of circumferentially spaced teeth extending radially and outwardly from an outer periphery of the sprocket body. The teeth of the sprocket include a plurality of up shift teeth. The up shift teeth has at least a first up shift tooth, a second up shift tooth located adjacent the first up shift tooth and a third up shift tooth located adjacent the second up shift tooth. The first, second and third up shift teeth are dimensioned to maintain alignment of a bicycle chain to prevent an up shift of the chain when an outer link plate of the bicycle chain meshes with the second up shift tooth, and to permit an up shift the bicycle chain when an inner link plate meshes with the second up shift tooth along a first up shift path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.