Planetary gear type transmission mechanism
US5194055A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1992 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Mar 18, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2007
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A planetary gear type transmission mechanism reduces frictional resistance at all forward speed ratio. The transmission mechanism includes an input shaft, an output shaft, a first planetary gear set, a second planetary gear set and a friction means. The friction means includes a plurality of friction elements for determining power transmission route through at least one of the first and second planetary gear sets for establishing a plurality of forward speed ratios. At any forward speed ratio all gear elements of the first and second planetary gear sets except for the gear elements integrally coupled with the output shaft rotate in the same direction as that of the input shaft at speed less than the input shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.