Patent ID: 7886534

Claim:
An integrated hydrostatic transmission comprising: an end block having a pump mount surface; a nose cup connected to the end block and having a motor mount surface; a pump element mounted to the pump mount surface of the end block and surrounded by an external pump housing; and a motor module including a housing portion and a motor element mounted to the motor mount surface of the nose cup, the motor element having an output shaft extending through the housing portion of the motor module to an exterior of the transmission for connection to a wheel; wherein the end block and nose cup include supply and return passageways for connecting the pump element to the motor element in a closed loop; wherein the end block has an exposed surface across which air can circulate to dissipate heat generated by the hydrostatic transmission; and wherein the nose cup includes a tubular portion for receiving and at least partially enclosing the motor element, the nose cup and housing portion of the motor module together enclose the motor element when the motor module is mounted to the nose cup.