Abstract: A light weight fluid energy converting device utilizing a fluid motor as supporting drive hub for a wheel or other driving attachments; the motor being of the reverse positioned vane type comprising a cylindrical rotor means enclosing a fluid channeled cammed stator actuating means, all supported on a basic stationary spindle by frictionless bearing means; one large end of the spindle being adapted to cycle a powering fluid in and out of the motor with an exterior controlled generating source; the motor housing, power ring, vanes, seal plates and stator body being constructed of light weight strong plastic materials easily adaptable for rapid mass production by known injection molding processes; the use of tubular metal coring assembly inserts embedded in the plastic mass serving as fluid flow channels and as stress relief reinforcing elements.

Abstract: A hydraulic wheel, more specifically a hydraulic energy converting device, having an inner stator provided with a peripheral camming surface and a rotor, enclosing the stator, and being rotatably mounted relative thereto; the rotor being adapted to cooperate with the camming surface of the stator to define a plurality of liquid-tight working chambers between the camming surface and the stator. Each working chamber has an inlet at one end and an outlet at the other end, the stator having a pressurized liquid distribution system to distribute pressurized liquid from an outer source to the respective inlet of each working chamber and a liquid collection system, independent of the distribution system, adapted to collect liquid from the respective outlet of each working chamber and direct it to the said outer source.