Cap for hydraulic fluid storage container

摘要

The storage container cap is part of the power steering system of a vehicle. A ventilation passage runs through a labyrinth seal in it. This labyrinth is formed from a series of cavities (4,7,11) one above the other, and there are apertures (3,8,10,13) between the cavities. These apertures are offset from each other. They lead to the storage container and to the outside. The apertures are in the deepest parts of the cavities. These cavities are formed from a beaker-like casing (1) and bottom parts in it (5,9).