Variable speed transmission
US4873879A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1987 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Sep 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19167
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A continuously variable transmission including a driving shaft connected to an engine output member and a driven shaft. The shafts are interconnected by a stepless variable coupling. A bidirectional gear drive mechanism connects the driven shaft to a differential mechanism having two output shafts extending therefrom. The drive mechanism includes a two gear forward and a three gear reverse drive path, each of which is controlled by a fluid-actuated starting clutch mechanism. Each gear path is adapted to drive a transfer gear which continually intermeshes with a ring gear of the differential defining another gear mesh. By such construction, the output shafts and the engine output memeber may rotate in the same direction during a forward drive mode of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.