Some cone CVT models use two rollers.[23][24] In 1903, William Evans and Paul Knauf utilized for your patent on a repeatedly variable transmission making use of two parallel conical rollers pointing in reverse directions and connected by belts that would be slid along the cones to fluctuate the transmission ratio. https://beckettqsrnm.bcbloggers.com/31963993/what-does-gearbox-cvt-mean