Patent ID: 8647087

Claim:
A hydraulic system comprising: a hydraulic motor including a housing section including a working fluid inlet port and a working fluid outlet port; a gerotor set connected with the housing section including a rotor and a stator, the rotor rotating and orbiting within the stator as fluid flows through the motor between the working fluid inlet port and the working fluid outlet port; a drive link connected to the rotor; an output shaft connected to the drive link; and an end plate connected to the housing section closing one end of the housing section, the end plate including a cooling fluid inlet port, a cooling fluid outlet port and a groove formed on an inner surface of the end plate, the groove being isolated from the working fluid inlet port and the working fluid outlet port within the motor such that cooling fluid entering the groove through the cooling fluid inlet port and exiting through the cooling fluid outlet port does not enter through the working fluid inlet port or exit through the working fluid outlet port as the cooling fluid travels through the motor; a pump including a pump inlet and a pump outlet; fluid lines connecting the pump to the hydraulic motor for driving and for cooling the hydraulic motor; and an oil cooler connected with at least one of the fluid lines.