Liquid container e.g. fuel tank, filler hole sealing device, has detection unit detecting level of liquid in fuel tank and maintaining retractable sealing unit in closing position, as long as liquid in tank is above threshold level

摘要

The device has a detection unit detecting the level of a liquid in a fuel tank (3). The detection unit maintains a retractable sealing unit (4) in a closing position, as long as the liquid in the tank is above a threshold level. The unit (4) is defined by a valve (8) that is mounted axially movable in a filler hole (2) so as to cooperate with a seat (9), where the valve comprises an axial control rod.