Windshield wiper blade and assembly

A windshield wiper assembly for use with a driven reciprocating wiper arm for cleaning a windshield of a vehicle, comprising:

• a blade arm assembly adapted to be mounted to and carried by the driven wiper arm and comprising an elongated support frame, and an elongated blade carrier pivotally mounted to said support frame;
• a first blade and a second blade mounted side-by-side to said blade carrier on opposite sides of said blade carrier, said first blade and said second blade both protruding toward said windshield;
• means for pivoting said blade carrier between a first position in which said first blade is contacting the windshield and said second blade is adjacent to and spaced from the windshield, and a second position in which said first blade is adjacent to and spaced from the windshield and said second blade is contacting the windshield;
• and
• a roller pivotally mounted to said blade carrier intermediate said first and second blades for movably supporting said blade carrier upon the windshield as said blade carrier is pivoted between said first and second positions.