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US 4,791,696 AGranted
Windscreen wiper system
OwnerGraham Durtnalinventor
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OwnerGraham Durtnalinventor
Estimating the term…
A windscreen wiper system comprises a drive shaft (1), a windscreen wiper arm (2) mounted at one end (3) on the drive shaft (1) for reciprocal pivotal movement therewith and a windscreen wiper blade (9) articulated to the other end (4) of the arm (2). A link (6) extending substantially at right angles to the surface of the windscreen is pivotally connected to both the arm (2) and the blade (9) so as to provide an articulated connection therebetween and a control lever (12) is pivotally connected at one end to the link (6) between the pivots for the arm (2) and the blade (9). A cam surface (15) is associated with the drive shaft (1) and a cam follower (16) is provided for cooperation with the cam surface (15) and mounted on the other end (11) of the control lever (12). The arrangement is such that the cam follower (16) follows the cam surface (15 ) during pivotal movement of the arm (2) and varies the position of the control lever (12) with respect to the arm (2) to move the blade (9) generally longitudinally of the arm (2).
A windscreen wiper system comprising a drive shaft, a windscreen wiper arm mounted at one end on the drive shaft for reciprocal pivotal movement therewith and a windscreen wiper blade articulated to the other end of the arm, wherein a link extending substantially at right angles to the surface of the windscreen is pivotally connected to both the arm and the blade so as to provide an articulated connection therebetween, a control lever is pivotally connected at one end to the link between the pivots for the arm and the blade, a cam surface is associated with the drive shaft and a cam follower is provided, for cooperation with the cam surface, mounted on the other end of the control lever, the arrangement being such that the cam follower follows the cam surface during pivotal movement of the arm and varies the position of the control lever with respect to the arm to move the blade generally longitudinally of the arm.
Dependencies are inferred from the claim text.