ALEXANDRIA, Va., July 16 -- United States Patent no. 12,669,129, issued on June 30, was assigned to WILO SE (Dortmund, Germany).
"Method of determining delivery flow or delivery head" was invented by Jens Olav Fiedler (Dortmund, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A torque required to achieve the modulated reference speed or adjustment of a modulated torque and the actual speed of the centrifugal pump is determined. Then a model speed is calculated with the aid of a mathematical pump-motor model simulating the behavior of the centrifugal pump within a hydraulic system as well as a disturbance signal from a deviation of the model speed from the actual speed of the centrifugal pump. Then a c...