Patent ID: 6766554
Filing Date: 2004-07-27
Classification: B60S,Y10T

Abstract:
A windshield wiper drive for imparting overlapping butterfly oscillation to a pair of spaced wiper shafts from a rotary drive member having a crank arm comprising:a drive link having first, second, and third connection points, the first connection point adjacent one end of the drive link and pivotally connectible to the crank arm of the rotary drive member, the second connection point adjacent an opposite end of the drive link, and the third connection point interposed between the first connection point and the second connection point along the drive link; an idler pivot link pivotable about a fixed axis and having at least three crank arms extending radially from the fixed axis and spaced from one another, the fixed axis of the idler pivot link being separate and independent of the pair of spaced wiper shafts to be driven; a first elongate link pivotally connected at one end to a first crank arm of the idler pivot link and pivotally connected at an opposite end to the second connection point of the drive link; a second elongate link pivotally connected at one end to a second crank arm of the idler pivot link and pivotally connected at an opposite end to the third connection point of the drive link, the first and second elongate links crossing with respect to one another; and a third elongate link pivotally connected at one end to a third crank arm of the idler pivot link and pivotally connectible at an opposite end for driving a first one of the pair of spaced wiper shafts.