Hydrostatic transmission controls to simulate gear drive
US7373776B2 · kind B2 · utility
5Cited by
13References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2005 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Jun 5, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/6616
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control apparatus is provided for a hydrostatic transmission to simulate a gear drive on a tractor. The hydrostatic transmission has a swashplate that is angularly movable to a plurality of positions, and a proportional valve that provides a control pressure to a servo piston to control the hydrostatic transmission swashplate position. A transmission control lever may be moved to a plurality of positions, each position providing a different voltage signal to a microcontroller. The microcontroller receives and converts a voltage signal to a coil current to actuate the proportional valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.