Abstract: A material mover assembly, comprising a chamber having an inlet and an outlet; a first paddle and a second paddle; and a gear assembly, wherein the first paddle is positioned in and configured to rotate circumferentially in the chamber, the second paddle is positioned in and configured to rotate circumferentially in the chamber, the gear assembly comprises an input drive shaft, a first output drive shaft, and a second output drive shaft, the first output drive shaft and the second output drive shaft are coaxial and concentric, the first output drive shaft is coupled to and configured to drive the first paddle, and the second output drive shaft is coupled to and configured to drive the second paddle, and a relative motion of the first paddle and the second paddle causes material to be pulled into the chamber via the inlet and pushed out of the chamber via the outlet in a forward direction.

Abstract: A material mover assembly, comprising a chamber having an inlet and an outlet; a first paddle; and a second paddle, wherein the first paddle is positioned in and configured to rotate circumferentially in the chamber, the second paddle is positioned in and configured to rotate circumferentially in the chamber, or is configured to be inserted into and retracted out of the chamber, and wherein relative motion of the first paddle and the second paddle causes material to be pulled into the chamber via the inlet and pushed out of the chamber via the outlet in a forward direction. A material mover assembly may be reversible in pumping direction and further may be used as an energy generator in either direction.