Patent ID: 7703701

Claim:
A system for spraying liquid for a windshield of an aircraft comprising a spray-liquid supply circuit, a pressurized-gas supply circuit designed to purge the spray-liquid supply circuit, the spray-liquid circuit and the pressurized-gas supply circuit being combined to form a combined liquid-gas supply circuit at an end of the spray-liquid circuit to be purged, and at least one nozzle being coupled to the combined liquid-gas supply circuit and disposed downstream from said circuits and designed to spray the spray liquid and pressurized gas on an aircraft windshield, wherein the system comprises a control device able to simultaneously actuate the temporary spraying of spray liquid and of pressurized gas respectively in the spray-liquid spraying circuit and in the pressurized-gas spray circuit in such a way that a pressurized-gas spraying time is strictly greater than a spraying-liquid spraying time, and wherein the pressure of the pressurized gas flowing in the pressurized-gas supply circuit is strictly lower than the pressure of the spray liquid flowing in the spray-liquid supply circuit, when they reach the nozzles.