Clutch device for automatic transmission
US7566287B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2005 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Aug 23, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2021/0692
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A clutch device for an automatic transmission, including a clutch drum supporting frictional coupling elements, a clutch piston disposed radially outwardly of the clutch drum, and a rotary speed sensor disposed radially outwardly of the clutch piston to detect a rotating speed of the clutch piston. The clutch piston has an inner spline for engagement with an outer spline of the clutch drum to prevent relative rotation between the clutch piston and the clutch drum, and further has a plurality of recesses formed in an outer circumferential surface thereof and corresponding to respective teeth of the inner spline, and a plurality of oil holes formed therethrough at an axial position of the clutch device at which the rotary speed sensor is located. The recesses and the oil holes are equally spaced apart from each other in a circumferential direction of the clutch piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.