Multiple blade windshield wiper

A windshield wiper blade assembly, for use with a driving arm that oscillates in a first direction and in a second direction across a windshield of a vehicle, the windshield wiper blade assembly comprising:

• a blade arm adapted to be connected to and carried by the driving arm, and comprising a plurality of fittings spaced among a length of the blade arm;
• a rod extending longitudinally along the blade arm and engaging the plurality of fittings;
• a blade subassembly with a plurality of mounts engaging attached to the rod wherein at least one of the blade arm and the blade subassembly pivots about the rod and the blade subassembly having a first blade, a second blade, and a third blade mounted side-by-side for engaging the windshield, wherein movement in the first direction causes engagement with the windshield to exert a force which pivots the blade subassembly into a first position in which the first and second blades contact the windshield and the third blade is spaced from the windshield, and wherein movement in the second direction causes engagement with the windshield to exert another force which pivots the blade subassembly into a second position in which the second and third blades contact the windshield and the first blade is spaced from the windshield.