Multiple windshield wiper blade assembly

Abstract

A wiper blade assembly (10) is provided including a housing (12), two blades (14), (16), two blade support structures (18), (20), and a switching mechanism (22). The housing (12) includes a shell (26) having two longitudinal channels (28), (28'). The housing (12) further includes a lower opening (36) and a bottom plate (38) sized to cover the lower opening. The bottom plate (38) is releasably connected to the shell (26) and includes two slots (40). An inner seal (46) attaches to an interior surface of the bottom plate and includes slots (48) that align with the bottom plate slots (40). The blades (14), (16) and blade support structures (18), (20) are positioned within the housing channels and are aligned with the bottom plate slots. Each support structure includes a middle portion having a transverse central hole (54). The switching mechanism (22) includes a shaft (62) and first and second cams (70), (72) attached to the shaft. The first cam (70) is held within the transverse hole of the first support structure (18) and the second cam (72) is held within the transverse hole of the second support structure (20). During use, the switching mechanism (22) causes at least one blade to extend through its respective slot and at least one blade to be retracted within the housing (12).