Some cone CVT designs use two rollers.[23][24] In 1903, William Evans and Paul Knauf utilized to get a patent over a continuously variable transmission working with two parallel conical rollers pointing in opposite Instructions and linked by belts that can be slid together the cones to fluctuate the transmission ratio. https://gearbox-cvt76307.blogdiloz.com/31805267/the-2-minute-rule-for-gearbox-cvt