Bicycle transmission having infinitely variable drive ratio
US4842569A · kind A · utility
9Cited by
9References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Nov 16, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H9/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A torque transmission apparatus having an infinitely variable gear ratio particularly suited for use as a bicycle transmission. The apparatus may be mounted on conventional bicycles and replaces the usual derailleur mechanism. A novel means is used to effect the gear changes which requires less force than previous devices. All force transmitting components of the apparatus are mechanically engaged without relying on friction which eliminates any possibility of slippage within the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.