Wave pump assembly

A wave pump assembly for pumping fluid medium comprising gaseous or liquid fluids or mixtures thereof with solids or the like, comprising a barrel defining an elongated cylindrical bore having an upstream end and an outlet end, drive shaft means journaled for rotation about the center axis of said bore, a positive displacement wave pump in said bore located between said upstream end and said outlet end, said pump having a stator frame provided with cylindrical outer surface portions engaging and conforming to the surface of said cylindrical bore and being supported against rotation in the bore, a rotor member having a helically contoured outer surface defining a plural turn helical thread formation of wide rounded form to orbit about the extended center axis of said drive shaft, means coupling said rotor member to the discharge end portion of said drive shaft to be driven thereby for rotation in the stator frame, a slide disc stack of a plurality of slidable sealing discs in face to face contact with each other extending along the major portion of the axial length of the stator frame, means supporting said discs for reciprocative sliding movement parallel to a first diametric plane of said cylindrical bore, said cylindrical bore having confronting surface portions facing the discs along the extent of said slide disc stack, the slide discs forming sealing discs having opposite outwardly convex cylindrically curved surface edge portions to be moved toward said confronting surface portions of said cylindrical bore into sealing engagement therewith and be withdrawn to a range of positions spaced from said bore surface portions towards the center axis thereof by said rotor member upon rotation of the latter, the discs having shaped center apertures receiving the rotor member therethrough and accommodating movement of the full diametric range of movement of the crests of said helical thread means in a second diametric direction perpendicular to said first diametric plane, the rotor and sealing slide discs and confronting surface of said bore forming a series of pumping pockets between the convex outer edge portions of the sealing discs and the surface of the bore which pumping pockets are moved longitudinally through the pump to force the fluid medium to move toward the discharge end of the positive displacement wave pump and the rotor and bounding surfaces of said apertures of the discs also forming pumping pockets to force the fluid medium to move through said apertures toward said discharge end.