Toroidal-type continuously variable transmission for automobiles
US6524212B2 · kind B2 · utility
24Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2001 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Apr 5, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H57/049
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A toroidal-type continuously variable transmission (CVT), including rolling elements having traction surfaces cooperating with each other to transmit a power between the rolling elements via a traction oil film formed between the traction surfaces. The traction surfaces have the microstructure that is defined with respect to a thickness of the traction oil film formed when the temperature of the traction portion of the traction surface is high, to thereby exhibit high traction coefficient even in the high-temperature operating condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.