Continuously variable hydrostatic transmission including 1:1 ratio lock-up clutch
US6062022A · kind A · utility
20Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Apr 20, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H39/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a continuously variable hydrostatic transmission including a hydraulic pump unit driven by an input shaft, a grounded hydraulic motor unit, and an intermediate, wedge-shaped swashplate for developing torque on an output shaft in response to pumped exchanges of hydraulic fluid between the pump and motor units through swashplate ports, a ratio controller is provided to vary transmission ratio by changing the swashplate angular orientation and to engage a lock-up clutch directly mechanically coupling the input shaft to the output shaft when a 1:1 transmission ratio is set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.