Step-change transmission having charge and variable displacement pumps
US8322252B2 · kind B2 · utility
0Cited by
19References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2007 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Feb 28, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19149
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission is provided for a mobile machine. The transmission may have a plurality of available gear combinations selectively engaged to produce multiple stepped output ratios. The transmission may also have a first fluid pump and a second fluid pump. The first fluid pump may be configured to pressurize a first flow of fluid. The second fluid pump may have variable displacement to pressurize a second flow of fluid. At least one of the first and second flows of fluid may be directed to cause selective engagement of the plurality of available gear combinations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.