Patent ID: 7942777

Claim:
A continuously variable automatic transmission for a vehicle for changing over between a lowest torque to a highest torque provided by the transmission, in a gradual and variable way without steps or shifts, in such a way an output speed and torque can be gradually changed, comprising: one planetary gear mechanism, having a sun gear, an internal gear, a plurality of planet gears and a planet carrier; an input shaft connected at one end to a prime mover and at the other end thereof to said sun gear which is never connected rotatably with a turbine output shaft of a hydraulic torque converter, said input shaft is also connected with a pump of a torque converter; an intermediate shaft connected at one end to the turbine output shaft of said hydraulic torque converter and at the other end with the carrier of said planetary gear mechanism; a permanent engaged one way brake, allowing said internal gear of said planetary gear assembly for being rotated free in the same direction of that of said input shaft when the torque provided by said hydraulic torque converter is enough for moving the vehicle; and an output shaft connected at one end to the carrier of said planetary gear mechanism and at the other end to the driving wheels of the vehicle.