Friction engagement device of automatic transmission
US7370744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2005 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Jul 11, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H63/3026
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a friction engagement device of an automatic transmission, a brake piston is actuated by an oil pressure and a friction disc is pressed by the brake piston. The friction engagement device of an automatic transmission includes an oil pressure chamber extending in an annular shape and a main oil pressure supply path and a secondary oil pressure supply path each extending separately to supply oil to the oil pressure chamber. Each of the main oil pressure supply path and secondary oil pressure supply path connects to the oil pressure chamber in a position different from each other in a circumferential direction of the oil pressure chamber. With a construction as such, a friction engagement device of an automatic transmission is provided which prevents a load to the friction disc from locally increasing and attains a smooth speed-changing operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.