Patent ID: 8776935

Claim:
A vehicle drive comprising: an internal combustion engine, serving as the power source driving a first shaft, a hydraulic motor, a hydraulic pump, a second shaft drivable by the hydraulic motor, at least one self engaging bi-directional overrunning clutch mechanically connecting the first shaft to the second shaft, wherein the self engaging bi-directional overrunning clutch is mounted around said first shaft and engages said second shaft such that torque from the first shaft can be transmitted to said second shaft, a transmission, a drive line, a rear end differential with two inputs, axles, wheels, and wherein, with the transmission in neutral, the engine drives the hydraulic pump which supplies fluid to the hydraulic motor, which drives through the self engaging bi-directional overrunning clutch into a first input of the differential to drive the axles which drive the wheels, wherein, when a higher speed is desired, the transmission is shifted from neutral, so as to drive the drive line, said drive line connected to a second input of the differential, said drive line driving the differential which drives the axles which drive the wheels, wherein the drive line drives the differential faster than the hydraulic motor, overrunning the hydraulic motor because of the self engaging bi-directional overrunning clutch and driving the axles which drive the wheels.