Traction-drive transmission
US4098146A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1976 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Sep 10, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H37/084
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention contemplates an improved mechanical traction drive providing a single control whereby a desired range of speed ratios between input and output shafts is selectively available, without requiring clutch connection to the power source, such as an internal-combustion engine. The transmission involves a combination of completely mechanical friction-roller and meshing-gear planetary systems which are connected at all times, whether the single control is operated to call for a forward drive, a stop or a reverse drive of the output shaft. For the particular disclosed form, provision is made for automatic downshifting reaction to increasing load, the major axial-reaction forces are self-contained by rotating mechanism, thus (a) avoiding substantial axial force components on main-bearings of the mechanism, and (b) reducing to very small magnitudes the requisite force for selective control actuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.