Power transmission mechanism

Claim 1

A POWER TRANSMISSION MECHANISM COMPRISING A HYDRODYNAMIC UNIT AND A SIMPLE PLANETARY GEAR UNIT, SAID HYDRODYNAMIC UNIT COMPRISING AN IMPELLER, A PRIMARY TURBINE AND A SECONDARY TURBINE DISPOSED IN TOROIDAL FLUID FLOW RELATIONSHIP, SAID GEAR UNIT COMPRISING A SUN GEAR, A RING GEAR, A CARRIER AND PLANET GEARS JOURNALED ON SAID CARRIER IN MESHING ENGAGEMENT WITH SAID SUN AND RING GEARS, FIRST FRICTION CLUTCH MEANS FOR COUPLING TOGETHER SAID PRIMARY TURBINE AND SAID SUN GEAR, A RELEASABLE REACTION BRAKE, FIRST OVERRUNING BRAKE MEANS FOR ANCHORING SAID SUN GEAR AGAINST SAID REACTION BRAKE WHILE ACCOMMODATING ROTATION OF SAID SUN GEAR IN THE OPPOSITE DIRECTION, SECOND FRICTION CLUTCH MEANS FOR COUPLING TOGETHER SAID IMPELLER AND SAID RING GEAR, MEANS FOR DRIVABLY CONNECTING SAID IMPELLER TO A PRIME MOVER, SAID CARRIER BEING CONNECTED TO A DRIVEN MEMBER, SECOND OVERRUNNING BRAKE MEANS FOR INHIBITING ROTATION OF SAID RING GEAR IN ONE DIRECTION WHILE ACCOMMODATING ROTATION THEREOF IN THE OPPOSITE DIRECTION, SAID SECONDARY TURBINE BEING DRIVABLY CONNECTED TO SAID SUN GEAR, AND MEANS FOR SELECTIVELY BRAKING SAID PRIMARY TURBINE AND SAID RING GEAR TO ACCOMMODATE REVERSE TORQUE DELIVERY FROM SAID SECONDARY TURBINE TO SAID SUN GEAR.