Security bottle closure device

In a closure device for bottles of the type having a screw thread at or adjacent the end of the neck thereof and means forming a radial shoulder facing away from the mouth of the bottle, said closure device comprising

• a cap having an elongate skirt,
• an internal screw thread on said skirt of said cap, said internal screw thread cooperating with the screw thread on the neck of a bottle when said cap is screwed thereon, and
• a tubular anchoring member fitted within said skirt of said cap below said internal screw thread thereof, said tubular anchoring member having an inner diameter greater than the outer diameter of the radial shoulder on the neck of a bottle on which the closure device is to be fixed,
• means forming a frangible connection between said tubular anchoring member and said skirt of said cap, and
• a plurality of resilient tongues on said tubular anchoring member, said resilient tongues extending away from said rim of said skirt of said cap and being shaped such that their free ends lie in a circle the diameter of which is less than the outer diameter of the radial shoulder on the bottle to which the cap is to be fixed, so as to engage there against,
• the improvement wherein:
• said tubular anchoring member is formed at the end thereof opposite that from which project said resilient tongues with a radially outwardly projecting flange which is joined to said rim of said skirt of said cap by said means forming said frangible connection of said cap to said tubular anchoring member,
• the radially outer faces of said resilient tongues of said tubular anchoring member have longitudinal ribs extending therealong,
• a portion of the inner face of said skirt of said cap is provided with a plurality of axial ribs for cooperation with said ribs on said radially outer faces of said tongues of said tubular anchoring member when said tongues are displaced radially outwardly as the said closure device is screwed for the first time onto the neck of the bottle onto which it is to be fixed, until the ends of said tongues engage against said radial shoulder, whereby to transmit to said anchoring member the torque applied to said cap upon screwing said closure device onto said neck of said bottle.