Rotary pump having a drive shaft releasably connected to the rotor

A pump for fluids or fluid-like media, comprising a housing, an inlet, an outlet, a pump operating media conveying chamber with a pump duct, an intake chamber, a conveying region, an outlet chamber, a rotor which has a rotor shaft, a drive having a drive shaft which is releasably connected to the rotor and having connecting boundary faces attached with a fastening device, the rotor having a pump element with a cylindrical external peripheral face and rotating in the pump duct and with undulating boundary faces extending radially from the rotor shaft, wherein the pump duct is cylindrical at least in the conveying region and is provided at least in the conveying region with a pump duct end face against which the greatest radial points of the pump element relative to an axis of rotation of the rotor and drive shafts rest in a sealed manner, and a shut-off element displaceable axially with respect to the rotational axis of the rotor within the pump operating chamber, the shut-off element sealing off the pump duct between the inlet and the outlet and comprising opposing sealing faces which reset in a sealed manner against the undulating boundary faces of the pump element during rotation of the rotor follow the undulating movement of the boundary faces of the pump element during the rotation of the rotor, and a seal which seals off the pump operating media conveying chamber from the housing, and wherein the fastening device connects the rotor shaft and the drive shaft outside the pump operating media conveying chamber, is resistant to centrifugal force and absorbs at least axial forces and the connecting boundary faces relative to the drive side, are outboard of the seal to maintain safe hygienic conditions in the pump operating media conveying chamber.