Automatic transmission
US8002663B2 · kind B2 · utility
5Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2008 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Apr 16, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2097
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An automatic transmission that includes two adjacent clutches. Two clutches each include a clutch drum, a piston that structures an operating oil chamber with a portion of the clutch drum used as a cylinder, a plurality of friction plates that engage with the clutch drum, a cancel oil chamber that is arranged on a back surface side of the piston and that cancels a centrifugal oil pressure acting on the operating oil chamber, and a return spring that is provided within the cancel oil chamber and that is structured between a cancel plate and a back surface of the piston and that biases the piston toward the operating oil chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.