Abstract: The present invention relates to a bottom-to-surface connection device comprising at least one undersea pipe or riser (1, 1a-1b) capable of including a single float (2, 21-27), said float being connected at its bottom end to a junction device (8) creating a leaktight flexible joint between the bottom end of the float (2) and said riser (1a), the connection device being characterized in that said junction device (8) is interposed between and secured to a bottom portion (1a) of the riser going down to the sea bottom and a top portion of the riser passing through said float and rising to the surface, said junction device (8) comprising at least one first laminated abutment in the form of a body of revolution having a plurality of elastomer layers defining surfaces of revolution that are frustoconical in shape or ellipsoidal in section.

Abstract: A bottom-to-surface link system includes a submarine pipe assembled to at least one float. At least one coaxial can surrounds the pipe. Junctions, which join the can to the pipe at the top and bottom orifices through which the pipe passes, include leakproof joints assembled around the pipe. Furthermore, the leakproof joints are flexible and resilient and are of the laminated abutment type.