Piston rod-cylinder unit for use in vibration damper of vehicle, has ventilation channel formed between ring housing and inner space, and bearing exhibiting ring housing with filter element, where housing extends over range of bearing

摘要

The unit (1) has a cylinder (3) in which a piston rod (5) executes axial operating movement, and a piston rod-side terminal bearing (17) i.e. ring bearing, arranged between axial movable elements. The piston rod is wrapped by a piston rod guard (7) i.e. bellows. An air inlet comprises a filter element (33) that is limited by the piston rod guard. A ventilation channel (25) is formed between a ring housing (31) and an inner space (11). The bearing exhibits the ring housing with the filter element, where the ring housing extends over the range of the terminal bearing.