Clutching device of an automatic transmission
US10760621B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 3, 2018 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Feb 2, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2063/303
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A clutching device of an automatic transmission includes: a clutch drum connected with a first rotation element, a clutch connected with the clutch drum and also a second rotation element, and a piston unit to operate the clutch. In particular, the piston unit includes: a first piston forming a first sealed space with the first rotation element and the clutch drum and moving toward the clutch to directly press the clutch by a hydraulic pressure supplied to the first space, a second piston forming a second sealed space with the first piston and the first rotation element, a spring retainer arranged on the first rotation element and forming a third sealed space with the first and second pistons and the first rotation element, a first return spring disposed between the first and second pistons, and a second return spring disposed between the spring retainer and the second piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.