Window wiper assemblies for vehicles

Claim 1

A window wiper assembly in combination with a vehicle cab, the vehicle cab having an opening forming a window, a window frame carried in the opening, a sash including a windowpane framed in the sash supported by the frame and being moveable relative thereto for opening and closing the window, and the window wiper assembly having a wiper drive supported on the window frame above the sash, a wiper arm having one end connected to the wiper drive and a swingable end connected to a wiper blade, wherein the improvement comprises: a cam supported on the frame above the sash and laterally spaced from the wiper drive, the cam having a first cam surface means connected to the frame engageable with the wiper arm upon upward swinging of the wiper arm to an inoperative position for lifting the wiper blade off of the windowpane, and having a second cam surface means connected to the frame for supporting the wiper arm after further upward swinging of the wiper arm to a parked position and for disposing the wiper blade in an out of the way position relative to the sash to permit the opening of the window without interference with the wiper blade; and wherein the first cam surface has a lower end connected to the frame and disposed laterally adjacent to the top of the sash and extending upwardly and outwardly therefrom and forming a guide means for the wiper arm for lifting the wiper blade from the windowpane and elevating same over the sash, and the second cam surface has an upper end connected to the frame and extending downwardly and outwardly therefrom and merging with the first cam surface means at a gentle peak forming a second guide means for the wiper arm for maintaining the wiper arm past the peak and at a raised position over the sash; and wherein the lower end of the first cam surface is connected to a plate having an opening, and further including lateral and angular adjusting means carried on the frame and passing through the opening in the plate for laterally spacing the plate from frame and angularly adjusting the lower end of the first cam surface about the connection of the upper end of the second cam surface to the frame, the lateral and angular adjusting means further including locking means for locking the cam in the selected lateral and angular position.