Patent ID: 9085283
Filing Date: 2015-07-21
Classification: B60S

Abstract:
1. A wiper blade for a surface of a type with a dual curvature, said wiper blade comprising: a rigid rod having a fixed predetermined shape, a flexible rod bearing a flexible blade element and secured at at least one point to the rigid rod, the flexible rod being flexible relative to the rigid rod and configured to assume at least a first shape generally conforming to the shape of the rigid rod and a second shape generally conforming to a curvature of the surface, means for applying a different independently controlled, amount of pressing force to individual ones of at least two points of said flexible blade element in a direction Z mostly normal to the surface, means for varying the different pressing forces over time, between pre-chosen positive and negative limit values, and means for commanding the different pressing forces, wherein the means for varying the different amounts of independently controlled pressing forces over time are electromagnetic means comprising polarized magnets incorporated into either the rigid rod or the flexible rod, on the side facing the other rod, said other rod comprising, facing each of these magnets, a controllable electromagnet, at least one passive electromagnet positioned between control electromagnets and having a coil; a polarized magnet disposed on the rod facing the passive electromagnet for each of the at least one passive electromagnet; and means for measuring the current flowing through each coil of the passive electromagnets at each moment.