Patent ID: 8919116

Claim:
A hydraulic drive apparatus, comprising a housing and a hydraulic motor cylinder block disposed in the housing; a motor shaft engaged to and driven by the motor cylinder block, the motor shaft having a first axis of rotation; an opening formed in the housing; a bushing disposed in the opening and having a cam face formed thereon; a brake shaft having a second axis of rotation, the brake shaft extending through the bushing and having a proximal end disposed external to the housing and a distal end disposed adjacent to the motor cylinder block, the distal end having a disengaged position where it is not engaged to the motor cylinder block and an engaged position where it contacts the motor cylinder block to provide a braking force thereto; and a mating structure engaged to the brake shaft and disposed adjacent to the cam face, whereby rotation of the brake shaft causes the mating structure to engage the cam face and force the brake shaft to move axially along the second axis of rotation from the disengaged position to the engaged position.