Patent ID: 8734386

Claim:
An electrical breast milk pump ( 1 ), comprising: an electric motor ( 27 ), a pump ( 29 ) driven by the electric motor ( 27 ), at least one suction cup ( 2 ), an outlet ( 5 ) for breast milk, connected to the suction cup ( 2 ) via a connection channel ( 4 ), a reservoir ( 24 ) for collecting breast milk, connected to the outlet, an outlet valve ( 6 ) disposed in the outlet ( 4 ), which closes when the difference between the pressure in the reservoir ( 24 ) and that in the suction cup ( 2 ) has a certain minimum value, and which opens when the value has fallen below the minimum, a floater valve chamber ( 11 ) which is connected to the connection channel ( 4 ) at the downside, and has a passage opening ( 13 ) at the topside, as well as a seal seat ( 14 ) surrounding the passage opening ( 13 ), a floater body ( 15 ), disposed in the floater valve chamber ( 11 ), which has a sealing body ( 16 ) at the topside which bears sealingly against the seal seat ( 14 ) when the floater body ( 15 ) floats up in the floater valve chamber ( 11 ), a suction line ( 31 ), connecting the passage opening ( 13 ) to the inlet ( 30 ) of the pump ( 29 ), an electrically activated first three-way valve ( 32 ), disposed in the suction line ( 31 ), a pressure line ( 35 ), connected to the connection channel and the outlet ( 34 ) of the pump ( 29 ), an electrically activated second three-way valve ( 36 ), disposed in the pressure line ( 35 ) a switch mechanism ( 40 ) for switching the electric motor ( 27 ) on and off, and an electronic control system ( 38 ), which is electrically connected to the switch mechanism ( 40 ), the electric motor ( 27 ) and the electrically activated first and second three-way valves ( 32 , 36 ), and which is configured to set the electric motor ( 27 ) into an operating mode or an idle mode depending on an activation of the switch mechanism ( 40 ), wherein in the operating mode, it operates the electric motor ( 27 ) and the electrically activated first and second three-way valves ( 32 , 36 ) in cycles, which comprise a suction phase, in which the electric motor ( 27 ) is switched on, the inlet ( 30 ) of the pump ( 29 ) is connected to the passage opening ( 14 ) via the suction line ( 31 ) and the first three-way valve ( 32 ) and the outlet ( 34 ) of the pump ( 29 ) is connected to the surroundings via the pressure line ( 35 ) and the second three-way valve ( 36 ), and which further comprise a pressure phase, in which the electric motor ( 27 ) is switched on, the inlet ( 30 ) of the pump ( 29 ) is connected to the surroundings via the suction line ( 31 ) and the first three-way valve ( 32 ) and the outlet ( 34 ) of the pump ( 29 ) is connected to the connection channel ( 4 ) via the pressure line ( 35 ) and the second three-way valve ( 36 ).