Patent ID: 6840879
Filing Date: 2005-01-11
Classification: B60K,F16H,Y10T

Abstract:
1. A hydraulic motor assembly having an external casing, the motor assembly comprising: a motor housing forming an internal volume and having an external surface forming part of the external casing; a port block engaged to the motor housing and having a motor running surface formed thereon and hydraulic porting formed therein; at least one pressure relief valve located in the hydraulic porting; a hydraulic motor mounted on the motor running surface; a motor shaft mounted in the housing and engaged to the hydraulic motor; an axle mounted in and extending out of one end of the housing, wherein the axle is driven by the motor shaft; a ring gear having a gear surface formed on an internal surface thereof; and a gear train engaged to the motor shaft, wherein at least part of the wear train runs on the gear surface.