Electric pump with printed circuit board stator

A pump, comprising:

• a housing (102), the housing defining a fluid inlet (106), a fluid outlet (108) and a pumping chamber (150) fluidly connected to the inlet and the outlet;
• a pumping element (118) mounted for rotation in the pumping chamber, wherein, in operation, the pumping element conveys an incompressible fluid to the outlet from the inlet;
• at least one permanent magnet structure (124A or 124B) fixed relative to the pumping element;
• a printed circuit board (PCB) (110) disposed in the pumping chamber adjacent the pumping element, the PCB comprising first and second outermost layers that are impervious to the fluid and a plurality of inner PCB layers (214) carrying windings (200) for an electric stator, the windings including a circumferential sequence of radially orientated spokes (210), each spoke being formed from overlapping radially orientated traces (210A) in the inner PCB layers, wherein the circumferential sequence of radially orientated spokes are operationally mated to the at least one permanent magnet structure so as to define an active stator area (206);
• wherein the at least one permanent magnet structure and the first and second outermost layers of the PCB in the region of the active stator area are disposed in and exposed to the fluid present in the pumping chamber.