Patent ID: 8122559

Claim:
A wiper system for a vehicle, comprising: first and second wiper arms that are placed one after another in a longitudinal direction of the wiper system; a wiper motor that includes an output shaft, which is reciprocally pivoted forward and backward upon energization of the wiper motor and outputs a drive force for driving the first and second wiper arms; a crank arm that is integrally pivotably fixed to the output shaft; first and second connecting rods are pivotably connected to first and second connecting points, respectively, of the crank arm, wherein the first and second connecting points are located on opposite sides, respectively, about a fixing point of the crank arm that is fixed to the output shaft, and the first and second connecting rods are reciprocally moved when the crank arm is reciprocally pivoted forward and backward by the output shaft; a first lever arrangement that is connected between the first connecting rod and the first wiper arm, wherein the first lever arrangement reciprocally pivots the first wiper arm relative to a body of the vehicle when the first connecting rod is reciprocally moved; and a second lever arrangement that is connected between the second connecting rod and the second wiper arm, wherein the second lever arrangement reciprocally pivots the second wiper arm relative to the body of the vehicle when the second connecting rod is reciprocally moved, wherein: the first lever arrangement includes: a pivot shaft that is pivotably supported relative to the body of the vehicle, wherein the first wiper arm is integrally pivotably fixed to the pivot shaft; and a pivot lever that is integrally pivotably fixed to the pivot shaft and is pivotably connected to the first connecting rod, wherein the pivot lever is placed on a predetermined side of the wiper system about the pivot shaft in a transverse direction of the wiper system, which is perpendicular to the longitudinal direction of the wiper system; and the second lever arrangement is pivotably supported relative to the body of the vehicle by first and second rotational shafts, which are spaced from each other, and includes: a main lever that is pivotably supported by the first rotational shaft and is pivotably connected to the second connecting rod, wherein the main lever is placed on the predetermined side of the wiper system about the first rotational shaft in the transverse direction of wiper system; a sub-lever that is pivotably supported by the second rotational shaft, wherein the sub-lever is placed on the predetermined side of the wiper system about the second rotational shaft in the transverse direction of the wiper system; and a connecting lever that is pivotably connected to a swing end portion of the main lever at a first connecting point of the connecting lever and is pivotably connected to a swing end portion of the sub-lever at a second connecting point of the connecting lever spaced from the first connecting point of the connecting lever, wherein the second wiper arm is connected to the connecting lever.