Patent ID: 8633623

Claim:
A submersible waste water and sump pump configured to be immersed in a fluid, comprising: a motor rotor configured to pump of the fluid surrounding the submersible waste water and sump pump; and an encapsulated stator assembly comprising: a stator configured with electrical windings to form a cavity to receive the motor rotor and to provide an electromotive force to drive the motor rotor arranged inside the cavity; a solid state switch having a low water sensor, a high water sensor and switching circuitry, the low water sensor and the high water sensor configured to respond to low and high water levels of the fluid and to provide signaling containing information about the low and high water levels of the fluid, and the switching circuitry configured to receive the signaling and provide corresponding signaling to control the operation of the stator by turning the electromotive force on and off to drive the motor rotor to control the pumping of the fluid by the submersible waste water and sump pump, based at least partly on a sensed level of fluid surrounding the submersible waste water and sump pump; electrical leads and connections configured to electrically couple the stator and the solid state switch, and to provide power to operate the stator and the solid state switch to drive the stator and to turn the electromotive force on and off to control the pumping of the fluid by the submersible waste water and sump pump; and a thermoplastic material configured to at least partially encapsulate the stator, the solid state switch and electrical leads and connections so as to form the encapsulated stator assembly with a watertight electrical seal to prevent the fluid from contacting the electrical windings, the switching circuitry of the solid state switch and the electrical leads and connections when the submersible waste water and sump pump is immersed in the fluid; and the encapsulated stator assembly being configured as an integrated watertight manufactured unit so as to receive the motor rotor when the submersible waste water and sump pump is assembled.