Single pivot front derailleur
US9919765B2 · kind B2 · utility
20Cited by
25References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Mar 31, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M2009/007
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Embodiments of a front derailleur gear shifting system including various unique chain guides attached to and operating from a single pivot point. This derailleur system provides a simple, yet, elegant and robust improvement in shifting technique over conventional, lateral motion front derailleurs. Embodiments of open and closed annulus chain guides having specially shaped lifting and pulling surfaces for acting upon a bicycle chain during shifting are also disclosed. Additionally, as an optional enhancement, a dual-sided chain catcher that prevents unintended over-shifts in either direction is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.