Patent ID: 8192183

Claim:
Pump, in particular a slurry pump, comprising a rotor driven so as to rotate in a case, wherein the rotor is constructed as a polygonal prismatic body in which at least the connecting lines of the corners of the base surfaces form an equilateral polygon, and which performs a rotational movement about an orbiting centre axis, with the prismatic body having longitudinal edges touching a longitudinal inner wall surface of the case, wherein the longitudinal wall of the case includes at least one supply opening for supplying the material to be conveyed and one discharge opening for discharging the material to be conveyed, the supply opening having a start and an end, the discharge opening having a start and an end, wherein, with the rotor in a first position, the end of the supply opening and the start of the discharge opening are offset from one another by an angle equal to the central angle of the equilateral polygon in relation to the centre axis of the rotor, and wherein, with the rotor in a second position, the end of the discharge opening and the start of the supply opening are offset from one another by an angle equal to the central angle of the equilateral polygon in relation to the centre axis of the rotor.