Multiple-speed hub
US3995503A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1975 |
| Grant date | Dec 7, 1976 |
| Priority date | — |
| Expiry date | May 15, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M11/16
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The transmission ratio of a multiple-speed hub for a bicycle or like vehicle may be changed by axially shifting the ring gear of a planetary gear transmission in the hub shell against the restraint of a return spring. A pawl on the ring gear and/or ratchet teeth on the hub shell have cooperating engagement faces which are obliquely inclined relative to the hub axis in such a manner that the driving force transmitted by the pawl to the ring gear has an axial component in the direction of the return spring action, thereby further axially securing the ring gear in at least one speed position of the hub, minimizing avoidable clearances, and reducing wear of the gear elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.