Rotary device which obtains mechanical power from kinetic or potential energy in a flowing, unconfined, and natural working fluid* such as a wind or water stream (i.e., "motor"* device).
SEE OR SEARCH THIS CLASS, SUBCLASS:
2.1+, for a natural fluid current motor device with means for controlling a casing or other flow guiding means in response to natural fluid current force or direction.
7, for a natural fluid current motor device comprising a float supported or buoyant runner.
