Patent ID: 8657735

Claim:
An inflatable gastric belt comprising: an elongated tubular body ( 2 ) with an inflation end ( 12 ) and a free end ( 16 ), made of supple material which is, in part at least, elastically deformable, which defines a tight inflatable chamber ( 3 ) with ends and which can be in a deflatable state and a back ( 4 ) formed by a wall of the chamber ( 3 ) and a work face ( 5 ) which is formed by another wall of the chamber ( 3 ), connecting means ( 10 , 11 ) arranged relative to the two ends ( 12 , 16 ) of the tubular body ( 2 ) and allowing the belt to close in the form of a ring, the work face ( 5 ) being arranged inside the ring, an inflation catheter ( 14 ) with a free end ( 26 ) and tightly connected to the inflatable chamber and intended to be connected to the inflation means, wherein the wall of the chamber ( 3 ) forming the work face ( 5 ), has, in the deflated state of the belt, a length (l 5 ) greater than or equal to the length (l 4 ) of the wall of the chamber ( 3 ) forming the back ( 4 ), such that, during closing of the belt and after inflation, the wall of the chamber, constituting the work face ( 5 ), forms folds ( 30 ) such that a section of passage as a result of closing of the belt into the ring is hypocycloidal-shaped and wherein each fold comprises a fold in the work face ( 5 ) with regions of the work face on either side of the fold in contact with each other.