Washing installation for windshields or motor vehicles, aircraft, locomotives or the like

A washing installation for windshields of motor vehicles, aircraft and locomotives, said washing installation comprising:

• a wiper arm;
• a motor connected to said wiper arm for driving same;
• a wiper blade having a central longitudinal plane and a predetermined length, attachable to said wiper arm, and including a channel having outlet apertures;
• retainer means for attaching said wiper blade to said wiper arm;
• a water reservoir having a pump;
• and
• a supply line for connecting said wiper blade channel to said water reservoir;
• wherein said wiper blade further includes a wiper blade portion facing a windshield, forming a part of a wall of said channel into which said outlet apertures are mortised, a wiper lip extending from said blade portion in the central longitudinal plane of the wiper blade, two boundary lips projecting from said blade portion toward the windshield along opposite side surfaces of said wiper lip, said two boundary lips having respective inner side surfaces which define, with respective opposite side surfaces of said wiper lip, respective substantially closed cleaning spaces on the windshield, and said wiper blade further including a swivel strip extending in the central longitudinal plane of said wiper blade for connecting said wiper lip to said channel wall part;
• and
• wherein said wiper lip has substantially a shape of a triangle with said swivel strip being connected to a base of said triangle, said triangle base having, on opposite sides of said swivel strip, portions, which form first means for blocking respective outlet apertures upon swivelling of said wiper lip in respective directions, and wherein said side surfaces of said wiper lip are defined by slightly concave side surfaces of said triangle, which have edge regions remote from said base and engaging respective inner edges of respective boundary lips, upon swivelling of said wiper lip in the respective directions, said edge regions of said concave side surfaces and said inner edges forming together second means for blocking flow from respective spaces defined betweens said side surfaces of said wiper lip and said inner side surfaces of said boundary lips.