Wiper arm for opening window of vehicle - has motorised disc with slot driving pegs of lever on wiper shaft, shaft moving with window glass

摘要

The wiper has the arm attached to a wiper shaft (12) supported in a mount (22) with bearings (18) that moves with the pane (14). The driving lever (34) has two pins, one fixed (48) and one spring-loaded (46) and engages a disc (56) driven back and forth by the motor (52) fixed to the car chassis (16). When the pane is closed, the wiper arm shaft and motor shaft are coaxial and the spring-loaded peg snaps into a recess (48) of the disc; in other window positions, it runs on the surface. The fixed peg runs in a semicircular groove (64) in the disc. The maximum sweep or the wiper arm is greater than the 180 degree oscillation of the motorised disc. ADVANTAGE - Sweep of wiper arm exceeds the 180 degree sweep of driving motor.