Windscreen wiper blade for road vehicle - is symmetrical about longitudinal rib or groove on each side

摘要

The wiper blade has a rectangular cross section. Along its length, in the centre of the blade, grooves (B1) or rounded ribs (A1) are produced on both faces. The blade is symmetrical above and below the groove or rib. The grooves or ribs are used to attach the blade to the reciprocating wiper mechanism.