(under subclass 198) Apparatus wherein the working members direct the fluid from opposed axial sides to either an axially inward or outward direction.
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184, for an impeller comprising a radially extending plate intermediate the ends of a working surface, the working fluid entering or leaving the working surface on both sides of the plate in opposed axial directions.
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415, Rotary Kinetic Fluid Motors or Pumps,
93+, for a rotary kinetic energy pump or motor comprising means to direct the working fluid to or from the impeller in axially opposed paths, usually for the purpose of end balancing the impeller.
