Bicycle transmission
US7712566B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2008 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Aug 8, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20462
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A bicycle transmission assembly that is mountable to a bottom bracket shell of a bicycle frame. The bicycle transmission assembly includes an input crank assembly, an output chainring, a planetary gear mechanism, a control system and a mounting system. The input crank assembly is mounted to a rotatable crank axle mounted to the bottom bracket shell. The planetary gear mechanism is mounted to the bottom bracket shell and provides a plurality of transmission paths. The planetary gear mechanism includes a sun gear, a ring gear and a locking element operatively connecting the sun gear and the ring gear. The control system is operatively connected to the planetary gear mechanism for selecting one of the transmission paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.