Patent ID: 8746500

Claim:
A mounting assembly for use in the biopharmaceutical field, the mounting assembly comprising: a first piece configured to be mounted in a removable and airtight manner, on a rigid annular collar of a second piece having one end opening, the first piece, with respect to a central longitudinal axis, comprising: a transverse wall configured to be received on the one end opening, and a peripheral annular wall that forms a skirt, an interior surface of the peripheral annular wall being configured to come into contact with an exterior surface of the collar, the transverse wall and the skirt, in one piece, being made of a material that offers an inherent sealing for the biopharmaceutical field and having a high degree of flexibility such that, in an inactive state, the first piece has a specified natural shape to be curved without being degraded such that starting from the inactive state, the first piece is configured to be stretched transversely and expanded to be able to be slipped onto or slipped off of the second piece, wherein an interior surface of the transverse wall, which is one of continuous and solid, and having at least one passage opening comprises a flat central zone, and a marginal zone positioned on a periphery of the first piece, when the first piece is combined with the second piece, the central zone of the interior surface of the transverse wall being essentially flat, and the marginal zone of the interior surface of the transverse wall having an essentially flat continuity relative to the central zone so as to form a part that is mated with an end edge of the collar that can be applied against the part and that is configured to contribute to sealing between the first and second pieces, wherein an interior surface of the skirt comprises a cylindrical part of larger diameter adjacent to the transverse wall, a cylindrical part of smaller diameter that is separated from the transverse wall, and a tilted, tapered intermediate part, in the active state where the first piece is mounted on the second piece, the parts of the skirt respectively contacting with elastic holding, tightening, and sealing on mating parts of the exterior surface of the collar of the second piece; wherein the first piece, with quick installation and removal, seals the second piece when the transverse wall is one of continuous and solid and connected with communication to the second piece, when the transverse wall comprises the passage opening.