Windshield wiper assembly

摘要

The disclosed windshield wiper assembly includes a squeegee, a backing element operatively connected to the squeegee, and a superstructure which is removably connected to the backing element and adapted to be connected to a windshield wiper arm for urging the squeegee towards the windshield. The superstructure consists of an elongated primary yoke having a pair of spaced free ends; a pair of secondary yokes are respectively pivotally mounted on the free ends of the primary yoke and have pairs of opposed cooperating claws formed thereon for releasably engaging the backing element. The primary and secondary yokes each have a generally triangularly shaped transverse cross section, through substantially their entire length, defined by a pair of inclined longitudinally extending side surfaces and a substantially flat base which extends parallel to and in spaced relation from the backing element. The side surfaces of the primary and secondary yokes present inclined pressure surfaces to an air stream moving over the surface to be wiped whereby downward components of force are produced on the yokes to increase the downward pressure on the squeegee. The backing element includes specially formed embossments located outwardly of the superstructure to provide stops for engagement with generally complementary shaped portions of the claws on the secondary yokes to prevent inadvertent removal of the backing member and squeegee from the superstructure.