Patent ID: 6085521
Filing Date: 2000-07-11
Classification: F16D,F16H

Abstract:
A continuously variable transmission, comprising:a housing having input and output shafts journaled therein for rotation about a central axis;drive structure on outer ends of said input and output shafts for torque coupling to a driver and a driven device, respectively;an axial piston pump in said housing coupled to said input shaft, and an axial piston motor in said housing coupled to said output shaft by an output coupling;said motor includes a swash plate driven in a nutating motion by axial pistons in said motor;said output coupling including a central boss on said motor swash plate engaged with a concave surface on said output shaft for providing a torque coupling between said motor swash plate and said output shaft for driving said output shaft from said motor swash plate;said axial piston pump and said axial piston motor arranged coaxially and concentrically with respect to each other;fluid passages connecting said axial piston pump and said axial piston motor whereby fluid pressurized by said pump drives said motor, and fluid displaced by said motor recirculates to said pump during suction phases of said pump.