Abstract: Method to assemble a water pump with an impeller driven by an electrical machine comprising a housing cap and a volute with an inlet and an outlet and a boot hosting a stator and a rotor of the electrical machine and an electronic board mounted at the side apart from the impeller and covered by the cap housing, the boot having a radial extending rim comprising at least slots defined by the following steps: connecting the volute to the boot by inserting axial hooks in the boot's slots, twisting the volute versus the boot to fix the axial hooks, inserting radial hooks of the cap housing in the same slots.

Abstract: A water pump with an impeller driven by an electrical machine comprising a housing cap and a volute with an inlet) and an outlet and a boot hosting a stator and a rotor of the electrical machine, wherein the rotor is mounted on a fixed shaft in the water pump having a bushing rotatable mounted on the shaft.

Abstract: Water pump with an impeller driven by an electrical machine comprising a housing cap and a volute with an input and an output and a boot hosting a stator and a rotor of the electrical machine and an electronic board mounted at the side apart from the impeller and covered by the cap housing, characterized in that the stator stack is over molded with a first plastic material and at least the stator stack, the wires and pins are over molded with a second plastic material to form a cylindrical ring boot and a heat sink that seals a cylindrical opening of the boot.

Abstract: An electric unit such as an electric water pump or an electric radiator fan for a motor vehicle with a plug-in connection comprises a region of the connections between contact tongues and stripped ends of the individual wires of the cable of the plug is sealed, and that a sufficient tightness can be ensured in relation to the ingress of moisture along the wires from the surroundings of the water pump through the plug into the housing. A plug and method for producing the plug for a plug-in connection on an electric unit includes a strain relief means, and a seal in the region of the electric contact between the contact tongues and the wire ends of the individual wires.

Abstract: A water pump with an impeller driven by an electrical machine comprising a housing cap and a volute with an inlet) and an outlet and a boot hosting a stator and a rotor of the electrical machine, wherein the rotor is mounted on a fixed shaft in the water pump having a bushing rotatable mounted on the shaft.

Abstract: Method to assemble a water pump with an impeller driven by an electrical machine comprising a housing cap and a volute with an inlet and an outlet and a boot hosting a stator and a rotor of the electrical machine and an electronic board mounted at the side apart from the impeller and covered by the cap housing, the boot having a radial extending rim comprising at least slots defined by the following steps: connecting the volute to the boot by inserting axial hooks in the boot's slots, twisting the volute versus the boot to fix the axial hooks, inserting radial hooks of the cap housing in the same slots.

Abstract: An electric unit such as an electric water pump or an electric radiator fan for a motor vehicle with a plug-in connection comprises a region of the connections between contact tongues and stripped ends of the individual wires of the cable of the plug is sealed, and that a sufficient tightness can be ensured in relation to the ingress of moisture along the wires from the surroundings of the water pump through the plug into the housing. A plug and method for producing the plug for a plug-in connection on an electric unit includes a strain relief means, and a seal in the region of the electric contact between the contact tongues and the wire ends of the individual wires.

Abstract: An electric water pump having a motor with an axially moveable rotor unit. A rotary pump member is fixed for axial movement with the rotor unit to vary its position within a pump chamber so as to vary the flow rate through the pump chamber.

Abstract: Water pump with an impeller driven by an electrical machine comprising a housing cap and a volute with an input and an output and a boot hosting a stator and a rotor of the electrical machine and an electronic board mounted at the side apart from the impeller and covered by the cap housing, characterized in that the stator stack is over molded with a first plastic material and at least the stator stack, the wires and pins are over molded with a second plastic material to form a cylindrical ring boot and a heat sink that seals a cylindrical opening of the boot.

Abstract: An electric water pump having a motor with an axially moveable rotor unit. A rotary pump member is fixed for axial movement with the rotor unit to vary its position within a pump chamber so as to vary the flow rate through the pump chamber.

Abstract: An electric water pump having a motor with an axially moveable rotor unit. A rotary pump member is fixed for axial movement with the rotor unit to vary its position within a pump chamber so as to vary the flow rate through the pump chamber.

Abstract: An electric pump comprises an outer housing including a motor cavity and a controller cavity separated by a partition wall. An inner housing is positioned within the motor cavity of the outer housing. One of the inner and outer housings includes radially extending ribs positioned adjacent to the other of the inner and outer housings to define a coolant flow path between the inner housing and the outer housing. The flow path is partially defined by the partition wall. An electric motor is positioned within the inner housing and includes a hollow rotor shaft driving a pump member. The hollow rotor shaft forms a portion of the coolant path and interconnects a volume between the inner and outer housings with a low pressure cavity containing the pump member. A controller is positioned within the controller cavity in heat transfer relation with the partition wall.