Friction gearing continuously variable transmission
US6390945B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2001 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Apr 13, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H15/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Continuously variable transmission consists of two rolling friction planetaries with a transversely mounted disk interposed between wheels of the planetaries. Varying the position of the disk varies the speed ratio. Transmitted forces urge an idler wheel into a converging space between the internal ring and the wheel in contact with the disk so as to establish contact forces as a function of transmitted torque. Ratio change is made easy by temporarily moving the disk laterally and utilizing the resultant change in contact position to establish a velocity vector which urges the disk toward a new position using only the power being transmitted. Well-known gear systems are used to extend the ratio range. Well-known tractants, or friction enhancing lubricants are used as lubricants to prevent wear yet maximize capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.