Patent ID: 7597172

Claim:
A power transfer apparatus for a vehicle comprising a housing having an axis; a power input shaft at one axial end of the housing that is connectable to a prime mover of the vehicle for receiving power from the prime mover; an output drive shaft at an opposite axial end of the housing that is connectable to one or more wheels of the vehicle for transfer of power to the one or more wheels; a primary hydraulic pump mounted to an axial end of the housing; a hydraulic motor mounted to an axial end of the housing; a transmission assembly contained within the housing, the transmission assembly including a pump coupling for coupling the primary hydraulic pump to the power input shaft, and a motor coupling for coupling the hydraulic motor to the output drive shaft; and a secondary hydraulic pump mounted to an axial end of the housing, and the transmission assembly includes a secondary pump coupling for coupling the secondary hydraulic pump to the power input shaft.