Automatic transmission for vehicles in general
US4928555A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Oct 28, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19167
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In order to provide an automatic transmission for vehicles, having a wide range of transmission ratio, a first transmission unit is provided, with a transmission ratio variable with continuity, connected on its inlet side with a driving shaft, and at least a second transmission unit and a third transmission unit are provided, each with a fixed transmsision ratio, which is different from each other, with each of them being connected, on its inlet side, with said first transmission unit, and on its outlet side, with a driven shaft of the vehicle, which they supply with motion, alternatively to each other; the second transmission unit and the third transmission unit are connected with the first transmission unit by means of two respective automatic couplings, which engage at different actuation speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.