Patent ID: 8550107

Claim:
Ventilation device for a fuel tank of a vehicle, the ventilation device comprising: a ventilation valve with a valve housing that has a ventilation opening; a float within the valve housing moveable from a resting position to a closing position; a sealing element on an upper side of the float that works together with the ventilation opening, whereby the float is in a lower position inside the valve housing when it is in its resting position and the sealing element on the upper side of the float releases the ventilation opening, and whereby the float presses the sealing element on the upper side of the float against the ventilation opening when the float is in its closing position and closes the ventilation opening due to buoyancy forces; at least one inflow opening located in the valve housing in an upper position close to the ventilation opening for allowing gas and fuel to flow through; a shut-off valve; at least one outflow opening located in the valve housing in a lower position that can be closed by a sealing element of the shut-off valve so that fuel can only enter the valve housing during refueling via the inflow opening when the outflow opening is closed by the sealing element of the shut-off valve; a storage container connected through a connecting conduit with an area located below the inflow opening of the valve housing in such a way that fuel inside the interior of the valve housing can flow out of the valve housing and into the storage container when the outflow opening is closed by the sealing element of the shut-off valve, a cross-section of the connecting conduit being smaller than a cross-section of the inflow opening; and an emptying device used to remove fuel from the storage container.