Patent ID: 7207452

Claim:
A device comprising: a distribution component to be maintained on a vessel neck having an external wall, the component having an operating rod; a retainer ring comprising a skirt defining an internal wall and an external wall, with the internal wall to contact the external wall of the neck, the ring having a through opening for the operating rod; and a lining collar surrounding the skirt of the retainer ring, the lining collar defining an internal wall and a visible external wall, the ring and the collar extending about an axially vertical axis, the ring and the collar being definitively secured on the neck, characterized in that the external wall of the skirt is formed with longitudinal external ribs extending axially vertically over the height of the skirt, said external ribs coming in fitting contact against the internal wall of the collar, and that the internal wall of the skirt is formed with longitudinal internal ribs extending axially vertically over the height of the skirt.