Incrementally variable transmission
US4521207A · kind A · utility
17Cited by
24References
6Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Jan 10, 1983 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Jan 10, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M9/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An incrementally variable transmission, particularly suitable for a bicycle, having a variable sprocket which comprises: A drive flange and an indexing flange mounted on an axle with a pair of sprocket-segment-planets and at least a pair of idler-planets sandwiched between said flanges and forming a relatively rigid structure, the planets adapted to expand and contract in response to a relative rotation of the flanges and thereby increase and decrease, respectively, the effective diameter of the variable-sprocket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.