Patent ID: 6854770

Claim:
A pipe comprising: a concrete cylinder possessing at least one annular end of determined longitudinal axis, defined by a longitudinal outside peripheral face and by a transverse front face; a female and ring coaxial with said end and secured thereto, the ring consisting of: firstly a longitudinal ferrule for securing to the cylinder, the ferrule being defined by a longitudinal inside peripheral face fitting snugly against said outside peripheral face in the immediate vicinity of said front face; and secondly a longitudinal skirt projecting longitudinally over said front face to engage coaxially on a male endpiece of another pipe, wherein the ferrule is in a state of circumferential elastic tension providing sealing relative to said outside peripheral face by said inside peripheral face applying thereagainst transverse pressure which is circumferentially distributed in a continuous manner, wherein said outside peripheral face and said inside peripheral face flare in the longitudinal direction going away from said front face and relative to the transition between the ferrule and the skirt, wherein said inside peripheral face presents one continuous annular sealing portion in relief facing said out aide peripheral face in a state of compression thereagainst, formed integrally with the ferrule, wherein said continuous annular portion in relief comprises a single rib which is substantially closer, longitudinally, to a free edge of the ferrule than to said transition, said free edge being longitudinally opposite said transition and wherein said inside peripheral face is fastened to said outside peripheral face by annular adhesive between them.