Patent ID: 8851123

Claim:
A sealed stopper for an opening in a junction tubing between an enclosure and a pipe, an attachment ring being positioned around the opening and attached onto an internal surface of the enclosure, the stopper comprising: a rigid lid formed by a substantially cylindrical central portion and a flat annular portion, a diameter of the central portion being smaller than an inner diameter of the attachment ring, the diameter of the annular portion being greater than the inner diameter of the attachment ring and provided with attachment members intended to be screwed into threaded orifices on the attachment ring, and a sealing assembly borne by the lid, wherein the sealing assembly comprises: a passive annular gasket including at least one annular chamber and provided with at least one outer lip, the gasket being deformable between a retracted position by depressurization of the at least one annular chamber during laying of the lid on the attachment ring and a deployed sealing position in which the at least one lip is applied against an internal surface of the attachment ring, a first static annular gasket capable of ensuring a seal between the internal surface and/or an upper internal angle of the attachment ring, a second static annular gasket capable of bearing upon an area of an upper surface of the attachment ring located between an internal rim and the threaded orifices of the attachment ring, during tightening of the attachment members of the lid, and a flat annular gasket capable of bearing upon an area of the upper surface of the attachment ring located between the threaded orifices and an external rim of the attachment ring, during tightening of the attachment members of the lid.