Patent ID: 8215110

Claim:
A drive apparatus comprising: a prime mover having an output shaft; a housing; an input shaft extending from the housing and drivingly engaged to the output shaft; a rotatable pump cylinder block engaged to and driven by the input shaft; a rotatable motor cylinder block engaged to and driving a motor output shaft; and a hydraulic mounting member disposed in the housing, the hydraulic mounting member comprising: a first member having a first hydraulic porting system formed therein, the first member further comprising a first running surface for the pump cylinder block, a first bottom surface formed generally opposite the first running surface and having a plurality of first extensions protruding therefrom, each first extension having a passage open to the first hydraulic porting system; and a first mounting flange having a plurality of first openings formed therein for connection to the first hydraulic porting system; and a second member separably connected to the first member and having a second hydraulic porting system formed therein, the second member further comprising a second running surface for the motor cylinder block, a second mounting flange having a plurality of second openings formed therein for connection to the second hydraulic porting system, wherein the second openings are shaped to receive the first extensions of the first member to connect the first and second hydraulic porting systems to form a closed hydraulic circuit.