Epicyclic gearboxes for transmission mechanisms

Claim 1

EPICYCLIC GEARBOX WITH COAXIAL INPUT AND OUTPUT SHAFTS DISPOSED ON THE SAME SIDE OF THE GEARBOX, FOR VEHICLES COMPRISING A TRANSMISSION WHEREIN THE GEARBOX PROPER IS ON THE SIDE OPPOSITE TO THE ENGINE IN RELATION TO THE FINAL REDUCTION GEARING AND THE DIFFERENTIAL, SAID GEARBOX COMPRISING A FIRST PLANETARY GEAR TRAIN, A SECOND PLANETARY GEAR TRAIN, A THIRD PLANETARY GEAR TRAIN, A FIRST BRAKE MEANS CONNECTED TO THE SECOND GEAR TRAIN FOR PROVIDING THE REVERSE DRIVE, A SECOND BRAKE MEANS FOR YIELDING THE FIRST SPEED RATIO DRIVE, A THIRD BRAKE MEANS FOR YIELDING THE SECOND SPEED RATIO DRIVE, SAID BRAKE MEANS EACH HAVING A ROTATABLE ELEMENT, A SINGLE CLUTCH MEANS FOR YIELDING THE DIRECT DRIVE AND HAVING A DRIVEN ELEMENT AND A DRIVING ELEMENT, SAID FIRST AND SECOND PLANETARY GEAR TRAINS HAVING A COMMON PLANET-CARRIER COUPLED TO SAID OUTPUT SHAFT, TO THE ANNULUS GEAR OF SAID THIRD PLANETARY GEAR TRAIN AND TO THE DRIVEN ELEMENT OF SAID CLUTCH MEANS, THE DRIVING ELEMENT OF WHICH IS COUPLED TO SAID INPUT SHAFT AND TO THE ANNULUS GEAR OF SAID FIRST PLANETARY GEAR TRAIN, THE SUN GEAR OF THE LATTER BEING COUPLED