Some cone CVT patterns use two rollers.[23][24] In 1903, William Evans and Paul Knauf applied to get a patent with a continually variable transmission using two parallel conical rollers pointing in opposite directions and linked by belts that might be slid alongside the cones to fluctuate the transmission ratio. Action: https://edgarbffip.activoblog.com/34815767/everything-about-gearbox-cvt