Transmission

Claim 1

A TRANSMISSION ADAPTED TO PROVIDE A PLURALITY FORWARD DRIVE RATIOS, NEUTRAL AND REVERSE, COMPRISING AN ENGINE DRIVEN POWER INPUT SHAFT, A FINAL POWER DELIVERY SHAFT, A HYDRODYNAMIC TORQUE CONVERTER UNIT OF THE TYPE ADAPTED TO BE SELECTIVELY FILLED WITH AND EMPTIED OF WORKING FLUID AND HAVING AN IMPELLER DRIVEN BY SAID INPUT SHAFT, A TURBINE AND A REACTION MEMBER, A PLANETARY GEARING UNIT COMPRISING A PLANET CARRIER SUPPORTING A SHORT PLANET PINION GEAR AND A LONG PLANET PINION GEAR IN MESH WITH SAID SHORT PLANET PINION GEAR, A FIRST SUN GEAR DRIVEN BY SAID TURBINE AND IN MESH WITH SAID SHORT PINION GEAR, A REACTION SUN GEAR IN MESH WITH SAID LONG PLANET PINION GEAR, A RING GEAR IN MESH WITH SAID LONG PLANET PINION GEAR, MEANS CONNECTING SAID REACTION MEMBER OF SAID HYDRODYNAMIC UNIT TO SAID FINAL POWER DELIVERY SHAFT FOR ROTATION THEREWITH AS A UNIT INCLUDING SAID PLANET CARRIER, A FIRST BRAKE EFFECTIVE WHEN ENGAGED TO PREVENT ROTATION OF SAID REACTION SUN GEAR IN AT LEAST ONE DIRECTION, A CLUTCH EFFECTIVE WHEN ENGAGED TO CONNECT SAID RING GEAR TO SAID INPUT SHAFT FOR ROTATION THEREWITH, AND A SECOND BRAKE EFFECTIVE WHEN ENGAGED TO PREVENT ROTATION OF SAID RING GEAR, SAID HYDRODYNAMIC TORQUE CONVERTER UNIT BEING FILLED WITH FLUID DURING NEUTRAL, FORWARD FIRST GEAR, FORWARD DIRECT DRIVE AND REVERSE CONDITIONS OF OPERATION AND EMPTIED OF FLUID IN SECOND GEAR FORWARD DRIVE, SAID FIRST BRAKE BEING ENGAGED TO COMPLETE THE ESTABLISHMENT OF FIRST GEAR FORWARD DRIVE, SAID FIRST BRAKE AND SAID CLUTCH BEING ENGAGED TO ESTABLISH SECOND GEAR FORWARD DRIVE, SAID CLUTCH BEING ENGAGED TO ESTABLISH DIRECT DRIVEN WHEN SAID CONVERTER IS FILLED WITH FLUID, SAID SECOND BRAKE BEING ENGAGED TO ESTABLISH REVERSE DRIVE WHEN SAID TURBINE IS FILLED WITH FLUID AND ALL OF SAID BRAKES AND CLUTCHES BEING RELEASED TO ESTABLISH NEUTRAL CONDITION OF OPERATION, A FLUID PRESSURE SOURCE ADAPTED TO BE CONNECTED TO SAID CONVERTER, MEANS INCLUDING A VALVE OPERABLE TO ADMIT FLUID FROM SAID SOURCE TO SAID CONVERTER OR TO CONNECT SAID CONVERTER TO EXHAUST, AND MEANS FOR CONTROLLING THE ENGAGEMENT AND RELEASE OF SAID CLUTCH AND SAID BRAKES FOR CONTROLLING THE TRANSMISSION DRIVE RATIO.