Some cone CVT models use two rollers.[23][24] In 1903, William Evans and Paul Knauf applied to get a patent on the continually variable transmission working with two parallel conical rollers pointing in reverse Instructions and related by belts that could be slid together the cones to change the transmission ratio. https://landenlcobo.bligblogging.com/33273121/the-gearbox-cvt-diaries