'Developments in production devices freshwater from seawater'.

摘要

The invention concerns a fresh-water producing apparatus to be immersed in a marine medium and of the type comprising at least one reverse-osmosis selective semi-permeable membrane. This apparatus comprises three stages: a fresh-water stage consisting of collecting means for the produced chamber provided with a semi-permeable membrane placed between this chamber and the fresh-water collecting means; and, a third stage comprising a mobile piston and an hermetic chamber having a gaseous atmosphere. The piston is designed to enter in variable depth the high-pressure chamber by one side having an effective area s and comprising an opposite side with an effective area S exceeding the area s and arranged to be at the pressure of the marine medium.