TODAYS PATENT- WINDSHIELD WIPER BLADE
The Windshield wiper blade was invented by Charles T. Fritz, Jr. on the 2nd of October 1984, bearing patent number US4473919A.
The above invention provides a a windshield wiper blade configuration comprises a tubular body portion made up of two semi-circular sections of different diameter connected by radially extending shoulders. Five ribs project from the smaller diameter sections generally radially with respect to the longitudinal axis of the body. The middle rib of the five constitutes the squeegee rib and is longer radially than the two scraping ribs.
Diametrically opposite the squeegee rib is a T-shaped mounting rib which serves the dual purpose of providing a means by which the blade is attached to the windshield wiper mechanism, and functioning as a hinge which allows the blade to rotate at the reversal point of each wiping stroke so as to engage the scraping ribs on opposite sides of the squeegee rib with the windshield in the manner described in the figure. Windshield wiper blades are used to wipe away snow, sleet, rain water or condensed moisture along with oil, insects, tree sap, dirt and other foreign matter from a vehicle windshield