Continuously variable transmission
US7811187B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 2005 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | May 12, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/66263
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A continuously variable transmission has a primary pulley having a primary movable sheave that is capable of moving to change a groove width of the primary pulley, and a secondary pulley having a secondary movable sheave that is capable of moving to change a groove width of the secondary pulley. Endless flexible members are engaged with the primary pulley and the secondary pulley to transmit torque therebetween. At least one of the pulleys has a thrust applying mechanism that is capable of applying spring force and first fluid pressure force to the movable sheave of the pulley so as to narrow the groove width thereof and generating second fluid pressure force opposite to the spring force and the first fluid pressure force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.