Wiper arm for car's windscreen has a hub with angular play relatively to axis and locking devices

摘要

Hub of windscreen wiper arm (2) rests on a stop (3) on the pivoting axis (1). The connecting ring (10) rotationally fixed to the axis fit into the hub cavity (32) with a certain amount of play. The connecting ring and the hub can have relative angular displacement when the locking devices (6,7) are in unlocked position, which are prohibited when they are locked.