Abstract: A screen wiper apparatus, especially for a motor vehicle, is of the kind comprising a wiper arm which carries at least one wiper blade and which is mounted pivotally about a pivot axis on a drive head for the arm. Torque applying means, coupled between the drive head and the wiper arm, apply a wiping torque to the latter, and include at least one spring which applies a substantially constant nominal torque to the wiper arm. The torque applying means includes at least one complementary spring for applying a load to the wiper arm wherein that the algebraic value of this load is adjustable in such a way that the value of the wiping torque can be increased or reduced as a function of at least one operating parameter of the vehicle.