Patent ID: 9115720
Filing Date: 2015-08-25
Classification: F04D,H02K

Abstract:
1. A combination dual pump and dual motor device comprising: a housing overmold; a shaft having a overmold-supported portion supported by the housing overmold in an intermediate location with first and second ends extending in opposite directions from the overmold-supported portion; an auxiliary upper volute attached to the housing overmold and with the housing overmold defining a first pump cavity at the first end and an auxiliary inlet to the first pump cavity and an auxiliary outlet from the first pump cavity; an auxiliary rotor assembly operably engaging the first end of the shaft and having an auxiliary pump impeller in the first pump cavity; a main upper volute attached to the housing overmold and with the housing overmold defining a second pump cavity at the second end and a main inlet to the second pump cavity and a main fluid exit passageway and a main outlet from the second pump cavity; a main rotor assembly operably engaging the second end of the shaft and having a main pump impeller in the second pump cavity; a stator assembly including an auxiliary stator adjacent the auxiliary rotor assembly and a main stator adjacent the main rotor assembly, and including windings on each of the auxiliary and main stators for causing independent rotation of the auxiliary rotor assembly and the main rotor assembly, respectively; a printed circuit board mounted to the housing overmold and programmed to independently control the auxiliary and main rotor assemblies; a circuit board cover attached to the housing overmold and covering the printed circuit board; and terminals operably connected to the PCB and extending from the housing overmold for connection to motors control system outside the device.