Patent ID: 7269876

Claim:
A window and lens glass cleaning system for a window or lens glass of a motor vehicle, comprising a pivotally mounted wiper arm for holding a wiper lip, which slides over the window or lens glass, said system comprising at least one washer fluid pipe which is mounted on the wiper arm, a connecting branch having a first end and a second end, wherein said first end is connected to said fluid pipe and wherein said second end is connected to a retaining part mounted on the wiper arm, the retaining part having a washer nozzle, wherein washer fluid situated in the retaining part is heatable with a heating element mounted to the retaining part in a recess for accommodating the heating element, wherein a nonreturn valve is located in the retaining part and arranged directly in front of the washer nozzle as seen in the direction of flow, wherein the nonreturn valve is configured as a duckbill valve, wherein said nonreturn valve is clamped between said second end of said connecting branch and said retaining part, wherein the recess can be closed by a flap, and wherein the retaining part is connected to the flap via a film hinge.