Hydraulic transmission
US4813234A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Jun 19, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/444
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic transmission, in particular for an automotive drive system including a combustion engine comprises at least a pair of hydrostatic pumps and at least a pair of hydrostatic motors each pump and/or motor having the same size or different size with a constant or adjustable through-put. Automatically actuated clutches are provided to connect the pumps to the engine and to connect the motors to a load. A variety of transmission ranges is obtained by activating selected ones of the individual pumps and motors by actuating corresponding clutches. Therefore, the combustion engine may be operated under conditions in which fuel comsumption is as low as possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.