Windshield wiper assembly
A windscreen wiper with a link arm arrangement ( 4 ) including a first pair of arms ( 5 ) and a second pair of arms ( 6 ) to which the first pair of arms ( 5 ) is connected in such a way that they can pivot, the first pair of arms ( 5 ) being attached to a chassis in such a way that they can pivot and the second pair of arms ( 6 ) being attached to a windscreen wiper blade ( 7 ) in such way that they can pivot. The windscreen wiper further including an adjustment mechanism ( 8 ) for controlling the size of an angle between the first pair of arms ( 5 ) and the second pair of arms ( 6 ) in synchrony with the pivoting of the first pair of arms ( 5 ).
1. A vehicle chassis, comprising:
a cab with an essentially rectangular windscreen that has left and right lateral edges, and
a windscreen wiper ( 2 ) with a link arm arrangement ( 4 ) comprising a first pair of arms ( 5 ) and a second pair of arms ( 6 ) to which the first pair of arms ( 5 ) is connected in such a way that they can pivot,
wherein the first pair of arms ( 5 ) is attached to the chassis at a location that is laterally outboard of one of the lateral edges of the windscreen and generally near an upper or lower corner of the windscreen and in such a way that they can pivot, and the second pair of arms ( 6 ) is attached to a generally vertically oriented windscreen wiper blade ( 7 ) in such way that they can pivot,
wherein the link arm arrangement further comprises a means ( 8 ) for controlling the size of an angle between the first pair of arms ( 5 ) and the second pair of arms ( 6 ), and
wherein the link arm arrangement ( 4 ) is arranged such that 1) the windscreen wiper is moved from near the lateral edge of the windscreen outboard of which the first pair of arms ( 5 ) is mounted generally horizontally across the windscreen toward the other, opposite lateral edge of the windscreen as the first pair of arms ( 5 ) is pivoted; and 2) the windscreen wiper is folded away from the field of vision of an operator in the cab along the lateral edge of the windscreen outboard of which the first pair of arms ( 5 ) is mounted when the windscreen wiper is in an inactive resting position.
2. The vehicle chassis as recited in claim 1 , wherein the means ( 8 ) for controlling the size of the angle between the first pair of arms ( 5 ) and the second pair of arms ( 6 ) is a control arm ( 8 ) that is attached to the chassis in such a way that it can pivot and is attached to one of the arms in the second pair of arms ( 6 ) in such a way that it can pivot.
3. The vehicle chassis as recited in claim 1 , further comprising a second element ( 10 ) providing a pivotal connection between the first pair of arms ( 5 ) and the second pair of arms ( 6 ).
4. The vehicle chassis as recited in claim 1 , wherein the arms in the first pair of arms ( 5 ) are parallel.
5. The vehicle chassis as recited in claim 1 , wherein the arms in the second pair of arms ( 6 ) are parallel.
6. The vehicle chassis as recited in claim 1 , wherein a power source is attached to at least one part of the link arm arrangement ( 4 ) which is attached to the chassis.