Patent ID: 8146198
Filing Date: 2012-04-03
Classification: B60S,Y10S

Abstract:
1. A wiper system for wiping a surface, comprising: a wiper comprising: a debris removal apparatus comprising an actuator actuable between a deployed state and a retracted state, wherein when said actuator is actuated to said deployed state, said actuator causes said pivotal arm portion to be pivoted such that said wiper blade is separated from the surface; wherein said motor operates to move the wiper arm over a range of reciprocation with respect to the surface; said actuator further comprising: an actuator rod extensible and retractable by said actuator; and a cam pivotally connected to said actuator rod, wherein said cam has a ramp portion and a drop portion, and wherein said cam is non-pivotal with respect to said actuator rod when a force is applied thereto along a first direction by said wiper arm, but is pivotal with respect to said actuator rod when a force is applied thereto along a second direction by said wiper arm opposite to said first direction; wherein when said actuator is at said deployed state and said wiper motor is operating such that said wiper arm is moving in said first direction, said wiper arm encounters said cam and slides on said ramp portion whereupon said wiper blade separates from the surface, and then allows said wiper arm to drop when said drop portion is encountered whereupon said wiper blade strikes the surface; and wherein when said actuator is at said deployed state and said wiper motor is operating such that said wiper arm is moving in said second direction, said wiper arm encounters said drop portion of said cam whereupon said cam pivots in relation to said actuator rod such that said wiper blade remains in wiping relation to the surface.