A deformable structure pressed around a hull breach yields an efficient seal in an original manner.
This idea is confirmed on the breach of a small boat in a swimming pool, using a foam balloon.
A prototype inflatable polyethylene balloon with an axial duct is successfully tested. Once inflated between the dammaged hull and a circular plate, it yields a quick and strong counter-pressure. Moreover, it adapts to irregular or angular surfaces.
A patent is filed with the French patent office in May 2014.