Abstract: A rotary disc pump for pumping fluid materials, comprises a housing having a front and a back wall forming a chamber with a generally coaxial inlet in the front wall and a generally tangential outlet, an impeller is mounted co-axially within the chamber and comprises a shaft mounted in the back wall of said housing and having an outer end extending from the housing and an inner end within the chamber, at least a first circular which is disc mounted on the inner end of the shaft, and at least a second disc which is mounted in axially spaced relation to the first disc and has an opening in the center thereof, arid a conical member which extends co-axially of the shaft from the first disc toward the second disc.

Abstract: A mixing apparatus for mixing delicate materials, has a rotor extending into a vessel for containing a quantity of material to be mixed, a support associated with the vessel, the mixing rotor mounted on the support for positioning in the vessel, the rotor comprising a rotatable shaft, a plurality of disc packs made up of a plurality of circular discs, each disc having an aperture in a center thereof, and means for mounting the discs on the shaft in axially spaced relation for enabling liquid to flow into the center of the discs and outward between the discs, and a motor drivingly connected to the rotor for rotating the rotor.

Abstract: A rotary disc pump comprises an outer housing with an inner cylindrical rotor chamber having an inlet at one end and an outlet at its outer periphery. A rotor assembly in the chamber comprises at least two parallel spaced discs disposed co-axially in the chamber and connected together for rotation about their center axis. The inner opposing faces of the discs are spaced a predetermined distance apart, and a series of raised ribs or vanes are provided on at least one of the opposing faces, with the vane height being less than the disc spacing to leave a clearance between the opposing disc surfaces.

Abstract: A pump for pumping a slurry includes a rotary pump having a plain disc impeller disposed in a cylindrical chamber of a housing with an inlet coaxial of the impeller into the housing and a substantially square outlet from the periphery of the chamber, with the rotor arranged to provide a substantially unobstructed passage between the inlet past the rotor to the outlet of the pump.

Abstract: A pump for pumping fragile articles including fish and glasses without damage includes a rotary pump having a plain disc impeller disposed in a substantially cylindrical chamber of a housing with an inlet into, or coaxial of, the impeller into the housing and an outlet from the periphery of the chamber, with the rotor arranged to provide a substantially unobstructed passage between the inlet past the rotor to the outlet of the pump. The method includes pumping fragile articles in a fluid medium by means of a disc impeller pump having an unobstructed passageway between the inlet and outlet of the pump.

Abstract: A pump for pumping fragile articles including fish and glasses without damage includes a rotary pump having a plain disc impeller disposed in a substantially cylindrical chamber of a housing with an inlet into, or coaxial of, the impeller into the housing and an outlet from the periphery of the chamber, with the rotor arranged to provide a substantially unobstructed passage between the inlet past the rotor to the outlet of the pump. The method includes pumping fragile articles in a fluid medium by means of a disc impeller pump having an unobstructed passageway between the inlet and outlet of the pump.

Abstract: A pump for pumping large solid articles includes a rotary pump having a plain disc impeller disposed in a substantially cylindrical chamber of a housing with an inlet coaxial of the impeller into the housing and an outlet from the periphery of the chamber with a rotor arranged to provide a substantially unobstructed passage between the inlet past the discs of the rotor to the outlet of the pump. The impeller includes pairs of discs spaced close together for providing increased fluid pressure and pairs spaced apart a distance for providing a passage for the solid articles. The articles are pumped in a fluid medium, such as water, through the pump and maintained suspended during transport from the inlet to the outlet of the system.