Automatic transmission for four wheel drive automotive vehicles
US4480505A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1980 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Jul 24, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19084
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An automatic transmission for a four wheel drive automotive vehicle comprising a torque converter, an automatic transmission connected to a turbine shaft of the torque converter for transmitting the output of the engine to the front-wheel, a fluid operated clutch for transmitting the output to the rear-wheel, and a pressure oil control for operating the automatic transmission. The pressure oil control includes a pressure regulator valve to produce a line pressure according to the operational condition of the engine and a valve for the clutch. The valve means is adapted to operate the clutch by manual operation, such that the automatic transmission is changed to the four wheel drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.