Infinitely variable, geared hydrostatic power transmission mechanism

Claim 1

IN A POWER TRANSMISSION MECHANISM, A POWER INPUT SHAFT, A POWER OUTPUT SHAFT, A COUNTERSHAFT, A PLANETARY GEAR UNIT COMPRISING A RING GEAR MEMBER, A SUN GEAR MEMBER, A CARRIER MEMBER, PLANET GEARS ROTATABLY JOURNALED ON SAID CARRIER MEMBER IN MESHING ENGAGEMENT WITH SAID SUN AND RING GEAR MEMBERS, A FIRST TORQUE DELIVERY GEAR CONNECTED TO SAID RING GEAR MEMBER, A SECOND TORQUE DELIVERY GEAR MOUNTED ABOUT THE AXIS OF SAID POWER OUTPUT SHAFT, SAID TORQUE DELIVERY GEARS BEING IN DRIVING RELATIONSHIP, MEANS FOR CONNECTING SAID SECOND TORQUE DELIVERY GEAR TO SAID POWER OUTPUT SHAFT, A PAIR OF VARIABLE DISPLACEMENT HYDROSTATIC UNITS DISPOSED IN A COMMON, CLOSED HYDROSTATIC CIRCUIT, ONE OF SAID HYDROSTATIC UNITS BEING DRIVABLY CONNECTED TO SAID POWER INPUT SHAFT, THE OTHER OF SAID UNITS BEING CONNECTED TO SAID COUNTERSHAFT, WITH THE ENTIRE DISCHARGE FLUID OF ONE HYDROSTATIC UNIT CIRCULATIN THROUGH THE OTHE RHYDROSTIC UNIT THROUGHOUT THE SPEED RATIO RANGE, SAID SUN GEAR MEMBER BEING CONNECTED TO SAID COUNTERSHAFT, A POWER INPUT GEAR CONNECTED TO SAID POWER INPUT SHAFT, MEANS FOR CONNECTING DRIVABLY SAID CARRIER MEMBER AND SAID POWER INPUT GEAR, AND MEANS FOR VARYING THE RELATIVE DISPLACEMENT OF SAID HYDROSTATIC UNITS WHEREBY THE SPEED OF SAID SUN GEAR MEMBER CAN BE VARIED.