Patent ID: 6314607
Filing Date: 2001-11-13
Classification: B60S

Abstract:
A wiper system for a vehicle, comprising:first and second wiper devices;said first wiper device comprising:a quadric linking mechanism which includes;a main lever connected to a pivoting shaft provided in a vehicle body and pivotable with said pivoting shaft;said main lever being rotatable through a rotation angle;a sub-lever pivotally supported by a spindle provided in said vehicle body at a predetermined distance from said pivoting shaft;an arm head having an end portion of said main lever pivotally connected thereto via a first connecting shaft and having an end portion of said sub-lever pivotally connected thereto via a second connecting shaft;a wiper arm connected to said arm head and having an end portion of a wiper blade connected thereto, said wiper arm being pivotable through a predetermined angle in accordance with the pivotal movement of said main lever,a range of the rotation angle of said main lever being from 75.degree. to 178.degree., the rotation angle of said wiper arm being at least 94.8.degree., and the ratio among a distance ""a"" between said pivoting shaft and said first connecting shaft, a distance ""b"" between said first connecting shaft and said second connecting shaft, a distance""c"" between said spindle and said second connecting shaft, and a distance ""d"" between said pivoting shaft and said spindle for a:b:c:d is 1:1.06:2.12:2.56, for minimizing fluctuations in wiper speed of the first wiper device.