Continuously-variable-ratio-transmissions
US5564998A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1995 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | May 17, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2037/104
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A continously-variable-ratio transmission ("CVT"), for instance of the toroidal-race rolling-traction type, capable of geared neutral and of operating in at least two regimes and including a ratio-varying component ("variator"), a power-recircuiting epicyclic, a final drive shaft connectable with the variator by way of one of two alternative driven shafts and an input epicyclic the input of which is connectable to a prime mover and the two outputs of which are connected to the two alternative driven shafts respectively. One of the regimes includes a "geared neutral" condition, and the power-recirculating epicyclic is associated with clutches whereby power is recirculated through it in that regime. In the remaining one or more regimes no power is recirculated within that epicylic, but drive reaches the CVT output by way of appropriate clutches and whichever of the two driven shafts will rise in speed as that regime proceeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.