Patent ID: 8257052

Claim:
A dosing electromagnetic pump comprising an operating electromagnet controlled by a driving device, the electromagnet comprises: a primary winding configured to be passed through by an energising current, and a moving element, configured to be attracted within the primary winding when said energising current is higher than a first threshold value, the moving element letting a liquid dose into an external hydraulic circuit depending on a travel of the moving element, and the driving device comprises a control logic unit configured to control said energising current, the control logic unit being configured to detect said energising current and provide said energising current to the primary winding until said energising current assumes a second threshold value, depending on a value of the liquid dose to let into the external hydraulic circuit, wherein: the second threshold value is higher than the first threshold value and not higher than a third threshold value in correspondence of which the moving element arrives at a stop, the second threshold value is the sum of a fourth threshold value, detected at an instant t P successive, by a constant interval not shorter than 0, to an instant t 0 at which said energising current begins to flow through the primary winding and preceding an instant t F at which said energising current assumes the third threshold value, and the second threshold value is a quantity not larger than the difference between the third threshold value and the fourth threshold value, said quantity depending on the value of the liquid dose to let into the external hydraulic circuit.