Patent ID: 7014583
Filing Date: 2006-03-21
Classification: F16H

Abstract:
1. A continuously variable belt-drive transmission for a motor vehicle, in which a belt-drive ( 4 ) runs between primary and secondary pairs of cone pulleys ( 2 , 3 , 6 , 7 ) with the primary pair of cone pulleys ( 2 , 3 ) mounted on an input shaft ( 1 ) and the secondary pair of cone pulleys ( 6 , 7 ) mount on an output shaft ( 5 ), and one pulley of each of the primary and secondary pairs of cone pulleys ( 2 , 3 , 6 , 7 ) being a fixed pulley ( 2 , 6 ) and the other pulley being an axially displaceable adjusting pulley ( 3 , 7 ), each pulley having tapered friction surfaces ( 25 to 28 ), and a first contact pressure device ( 9 ) being provided for axial displacement of the primary adjusting pulley ( 3 ), and a second contact pressure device ( 10 ) being provided for axial displacement of the secondary adjusting pulley ( 7 ); wherein a first pressure chamber (