Abstract: The invention relates to a cutting tool pertaining to a centrifugal pump for liquids loaded with solids. Said cutting tool comprises a rotating cutting body comprising at least one opening forming a cutting edge and through which the liquid flows, the lateral surface of the cutting body facing the rotationally fixed opposite surface that also comprises at least one opening through which the liquid flows. The lateral surface of the cutting body, facing the opposite surface, is curved in a convex manner, and the opposite surface is curved in a correspondingly concave manner.

Abstract: The invention relates to a cutting tool pertaining to a centrifugal pump for liquids loaded with solids. Said cutting tool comprises a rotating cutting body comprising at least one opening forming a cutting edge and through which the liquid flows, the lateral surface of the cutting body facing the rotationally fixed opposite surface that also comprises at least one opening through which the liquid flows. The lateral surface of the cutting body, facing the opposite surface, is curved in a convex manner, and the opposite surface is curved in a correspondingly concave manner.

Abstract: An impeller for a submersible radial pump has an impeller disk which is formed with a pair of blades on a side thereof opposite the boss. The leading end of one of the blades is thicker than the leading end of the other blade to reduce the possibility that pieces of fabric or the like will hang up on the blades in operation of the pump.

Abstract: A centrifugal pump having a single-blade rotor whose central suction mouth, remote from the driving shaft, is in alignment with the inlet opening, the inlet opening forming an annular collar which so projects into the inside of the rotor that the inner end of the rotor blade forms a narrow gap with the outer surface of the collar.

Abstract: A submersible motor-driven pump which has a jacket for the motor casing through which a coolant flows, the jacket receiving a pipe with a bent inlet for discharging the coolant and which lies against the motor casing and extends the full height of the jacket from the partition between the motor casing and the pump below the motor to the top of the jacket.

Abstract: The invention relates to a device for attaching and connecting a multicore electric cable to the motor of a pump, more particularly a submersible motor-driven pump, having a tubular connecting casing, wherein the connecting casing is attached, more particularly screwed in an outwardly open aperture in the motor casing and/or in the pump bearing support and has internally a water-tight transverse wall which is disposed transversely of the longitudinal axis of the connecting casing and in which conductive pins are cast which project axis-parallel on both sides of the transverse wall and onto which on both sides bushes are fitted which are connected on the motor side to leads of the motor and on the outside to cores of a connecting cable.