Sealing device for e.g. rain water evacuation, on flat roof, has membrane with annular part, where compression forces of membrane between conduit and one ring and between flanges of two rings are such that membrane is fixed on conduit

摘要

The device has a cylindrical axial conduit (16), and a flexible radial membrane (19) whose annular part is adjacent to a central opening (21). The annular part is axially folded and placed between an interior surface of the conduit and an exterior surface of an interior ring (17) that is engaged in the conduit. An external ring (22) surrounds an end of the conduit, where the compression forces of the membrane between the conduit and the ring (17) and between flanges (18, 20) of the rings are such that the membrane is fixed on the conduit. An independent claim is also included for a method for manufacturing a sealing device for a roof of a building.