公开(公告)号：EP2969731A4

公开(公告)日：2016-11-16

申请号：EP14763817

申请日：2014-03-17

申请人： WICK WERKS LLC

发明人： WICKLIFFE CHRISTOPHER A ,  GOATES ELDON L

IPC分类号： B62M9/1342 ,  B62M9/134 ,  B62M9/1344 ,  B62M9/136

CPC分类号： B62M9/134 ,  B62M9/1342 ,  B62M9/1344 ,  B62M9/135 ,  B62M9/136

摘要： 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.