Patent ID: 6162144
Filing Date: 2000-12-19
Classification: F16H

Abstract:
A traction transmission and control comprising:a traction drive having spaced discs, a traction roller disposed between and in frictional engagement with said discs, first piston means for enforcing a normal force between said discs and said traction roller, and second piston means for enforcing a traction force between said discs and said roller;a traction fluid disposed between said discs and said traction roller and having a variable coefficient of traction;a source of fluid pressure;first control valve means for supplying fluid at a first pressure level from said source to said first and second piston means to establish a normal force at said first piston means and a traction Force at said second piston means;second control valve means receiving fluid from said first control valve means for delivering fluid at a variable pressure level to said second piston means to cause a variation of said traction force at said second piston means in accordance with the coefficient of traction of said traction fluid.