Pressure-medium actuated shifting arrangement
US4633987A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Apr 4, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19433
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Pressure-medium actuated shifting arrangement for a gear transmission, primarily for a multispeed transmission, in which the speed selection lever performs a movement in accordance with a double H shifting configuration. Within the reach of the driver, in a shift console another transmission shaft is mounted, which is displaced by the speed selection lever for path selection and twisted for gear shifting. The transmission shaft has also cams and valves cooperating with a pressure-medium source over the selection cylinder and shift cylinder mounted to the gear box which actuate a gear-shift-lever shaft, whereby not only the desired shift couplings are put into effect, but also feedback information about the shifting situation in the transmission perceptible by the driver is conveyed. Further safety valves are mounted on the gear-shift-lever shaft which allow the selection movement to take place only in the neutral position and multistep cams are located on the same shaft, which together with 3/2-way valves mounted radially displaceable as pistons arrest the two-position shift cylinder also in the median position. Over the piston assembly an optimal gear or an optimal path, in depend…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.