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A pump for the drain outlet of washing machines having a synchronous electric motor with a permanent-magnet rotor which is associated, by a flange, with a dome which forms a chamber for the impeller, further having an impeller with radial vanes which protrude from a perforated disk provided with a p

A pump for the drain outlet of washing machines having a synchronous electric motor with a permanent-magnet rotor which is associated, by a flange, with a dome which forms a chamber for the impeller, further having an impeller with radial vanes which protrude from a perforated disk provided with a plurality of pressure-compensating vanes on a motor side of the disk, a dome which forms the chamber of the impeller, an intake duct which has an elliptical cross-section with a median axis which is parallel to an axis of the impeller but is axially offset on an opposite side with respect to a discharge duct, which also has an elliptical cross-section, with a radiused inlet which has the local internal configuration of the dome.

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[ What is claimed is:] [1.]1. A pump for the drain outlet of washing machines, comprising a synchronous electric motor with a permanent-magnet rotor which is associated, by means of a flange, with a dome which forms a chamber for an impeller, further comprising an impeller with radial vanes which pr

[ What is claimed is:] [1.]1. A pump for the drain outlet of washing machines, comprising a synchronous electric motor with a permanent-magnet rotor which is associated, by means of a flange, with a dome which forms a chamber for an impeller, further comprising an impeller with radial vanes which protrude from a perforated disk provided with a plurality of pressure-compensating vanes on a motor side of the disk, a dome which forms the chamber of the impeller, an intake duct which has an elliptical cross-section with a median axis which is parallel to an axis of the impeller but is axially offset on an opposite side with respect to a discharge duct, said discharge duct having an elliptical cross-section, with a radiused inlet which has the local internal configuration of said dome.