Speed change gear for automatic transmission
US6790155B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2003 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Jul 16, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/201
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A speed change gear for an automatic transmission includes: 1) an input portion for inputting a rotation from a power source; 2) an output portion disposed substantially coaxially with the input portion; 3) three planetary gear sets for providing a plurality of power conductive paths to an area defined between the input portion and the output portion; and 4) a first clutch, a second clutch, a third clutch, a first brake and a second brake selectively connected and disconnected in such a manner that the three planetary gear sets change a rotation from the input portion at a corresponding gear change ratio by selecting one of the power conductive paths. The three planetary gear sets is constituted of a speed reduction planetary gear set for continuously reducing the inputted rotation and outputting the thus reduced rotation, a double sun gear planetary gear set, and a single pinion planetary gear set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.