Abstract: A ventilation device includes a ventilation opening closable by a float in a valve housing interior, an inflow opening in an upper portion, at least one outflow opening in a lower portion that can be closed by a sealing element of a shut-off valve. A storage container is connected through a conduit to the valve housing interior so that fuel can flow from the housing interior into the storage container.

Abstract: The invention refers to a ventilation valve for the fuel tank of a motor vehicle with a housing (2) that has a ventilation opening (28), a movably arranged float (5) in the housing in the direction of its middle longitudinal axis (16) and a float-held sealing element (29), which—seen in the top view towards the middle of the middle longitudinal axis (16) of the housing (2)—is fixed on the float (5) outside of the ventilation opening (28,28a) on the arranged fixing spot (35), in which case the ventilation opening (28,28a) has a non-circular opening contour and, extending away from the fixing spot (35), a terminal section (39) whose clear width (36) increases with increasing distance from the fixing spot (35), in which case the clear width (36) is measured transversally to an imaginary middle plane (37) that cuts the fixing point (35) in the center and contains the middle longitudinal axis (19) of the float (5).

Abstract: A vent valve for a fuel tank of a motor vehicle includes a housing, a cage in the housing, a movable float, and a sealing arrangement with an at least three-stage reopening operation. The sealing arrangement includes multiple movable supports defining openings of varying cross-sectional area sequentially operable.