Patent ID: 7331411

Claim:
A hydraulic motor comprising a rotor, said rotor having a plurality of vanes in slots, said rotor being free turning inside a track ring, thereby forming a plurality of hollow chambers separated by a plurality of internal cams of said track ring, the surface of said internal cams having a running clearance to the outer surface of said rotor, whereby a running clearance is formed between said rotor and the internal cams; and wherein said rotor is comprised of a single component with integral shaft, said shaft having a hollow center, said hollow center forming a main oil gallery that connects the non-drive end of said shaft to the center of said rotor, whereby a path is created for oil to flow through said main oil gallery to a plurality of distribution galleries of said rotor, the distribution galleries delivering oil to the chambers, whereby said main oil gallery eliminates the need for inlet ports, thereby increasing the displacement angle for said vanes to travel through said chambers while being driven by the throughput of said oil, thereby providing increased power output over a conventional hydraulic motor.