Continuously-variable-ratios transmissions
US5895337A · kind A · utility
82Cited by
14References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1997 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | Aug 8, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H15/38
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A variator for a continuously-variable-ratio transmission (CVT) of the half-toroidal traction roller type in which a ratio change results when a roller exercises a first freedom of movement by rotating about a first or precession axis. In addition, the roller mounting has a further freedom of movement about a second or tilt axis. The precession axis is inclined at an angle ("the castor angle") to a plane lying normal to the axis of the races and each equilibrium value of the ratio angle correlates with a unique angular orientation of the roller about the tilt axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.