Some cone CVT styles use two rollers.[23][24] In 1903, William Evans and Paul Knauf utilized for the patent over a constantly variable transmission making use of two parallel conical rollers pointing in opposite Instructions and related by belts which could be slid alongside the cones to vary the transmission ratio. https://gearbox-cvt64196.vidublog.com/31798210/not-known-factual-statements-about-gearbox-cvt