Multi-speed transmission
US8968144B2 · kind B2 · utility
77Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2014 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Feb 21, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2097
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission gearing arrangement includes four simple planetary gear sets arranged in two planes to reduce axial length. Six shift elements, including two input clutches, two output clutches, and two brakes, are engaged in combinations of three to establish nine forward speed ratios and one reverse speed ratio. The two output clutches may be assembled into a module suitable for testing before installation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.