Patent ID: 7381036

Claim:
A motor-pump unit for a medium comprising: first and second internal gearwheel pumps, each of said first and second internal gearwheel pumps having a pinion, an internal geared wheel eccentrically disposed therein, and a pinion shaft held by side disks, said pinions being identical to the other, said first and second internal gearwheel pumps being axially aligned; an electric motor operably connected to at least one of said first and second internal gearwheel pumps, said electric motor having a rotor with a U-shape in an axial cross-sectional view and concentrically surrounding said at least one of said first and second internal gearwheel pumps, said rotor having an internal toothing disposed on a web of said U-shape in a region of a rotational axis of said rotor, said internal toothing meshing with said pinion shaft of each of said first and second internal gearwheel pumps; and a housing enclosing said electric motor and said first and second internal gearwheel pumps, wherein the motor-pump unit has a single suction connection and first and second pressure connections.