Some cone CVT layouts use two rollers.[23][24] In 1903, William Evans and Paul Knauf used for the patent on a constantly variable transmission working with two parallel conical rollers pointing in opposite directions and related by belts that would be slid alongside the cones to vary the transmission ratio. They https://gearboxcvt08630.bloggosite.com/39463346/5-simple-techniques-for-gearbox-cvt