Gear box with gears shiftable under load
US5078249A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1990 |
| Grant date | Jan 7, 1992 |
| Priority date | — |
| Expiry date | Aug 30, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19279
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gearbox comprising two shafts (20, 27) with their axes parallel to one another and at least two pairs of gear wheels each pair comprising a wheel (38) on one of the shafts permanently in mesh with a wheel (45) on the other shaft, the wheels (45) on one of the shafts being connectable to the shaft by friction clutches, and actuating means disposed between adjacent friction clutches to selectively engage one or other of them; the actuating means comprising two pressure rings (2) and an adjusting ring (1) disposed between them, adjusting rings (5) for causing relative angular movement between the adjusting ring and pressure rings, and opposed pairs of grooves (21, 22) in the facing surfaces of the adjusting ring and pressure rings. Angular movement of the adjusting ring in one direction relative to the pressure rings causes axial movement of one pressure ring to operate on its adjacent friction clutch, while angular movement of the adjusting ring in the other direction causes axial movement of the other pressure ring to operate on the other friction coupling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.