Water-tight elastic and rubbery hollow body inserted into opening in building by medium such as air or water ad has air inlet and outlet valve

摘要

At least one elastic rubbery hollow body (3)is inserted under pressure, by a medium (4) such as air or water, into the openings(1) in a building (2), The exterior of the hollow body is stabilized by seams. The peripheral shape of the hollow body encloses the edge of the opening. and is activated by a pressure inlet and outlet valve (8) for the medium