Multiple speed shaft drive for a bicycle
US5622081A · kind A · utility
Inventor
Key dates
| Filing date | Dec 29, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Dec 29, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19353
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A multiple speed shaft drive for a bicycle, including: a forward disk having a plurality of concentrically disposed ring gears, wherein the forward disk is connected with the pedal crank of the bicycle; a rearward disk having a plurality of concentrically disposed ring gears, wherein the rearward disk is connected to the rear wheel hub; a forward drive shaft; a rearward drive shaft; a free wheel mechanism connecting the forward drive shaft to the rearward drive shaft; a forward pinion gear slidably mounted to the forward drive shaft; a rearward pinion gear slidably mounted to the rearward drive shaft; a forward gear shift mechanism for moving the forward pinion gear into gearing engagement with a selected ring gear of the forward disk; a rearward gear shift mechanism for moving the rearward pinion gear into gearing engagement with a selected ring gear of the rearward disk; and a clutch mechanism which automatically disengages the rearward hub from gearing engagement with the rearward pinion gear whenever a gear shift is made with a shift control operated by the cyclist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.