(under subclass 905) Device wherein the working fluid* path to, through, and from the runner* is predominantly parallel to the runner's axis of rotation.
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4.3, for a rotary pump* or motor* with means for controlling casing* or flow guiding means in response to natural fluid current force, which pump or motor includes an axial flow runner.
4.5, for a rotary pump* or motor* with means for controlling casing* or flow guiding means in response to natural fluid current direction, which pump or motor includes an axial flow runner.
