Patent ID: 6916326

Claim:
A gastroplasty ring formed by flexible strip ( 1 ) suitable towards its two ends ( 5 , 5 ′) for being close around the stomach by a closure system ( 10 , 10 b , 11 , 12 , 12 ′, 13 ) so as to reduce the diameter of the opening of the stoma, said strip having an annular compression chamber ( 2 ) of adjustable volume and of substantially constant section connected by an adjustment catheter ( 4 ) to a device ( 6 ) for adjusting the internal pressure in said chamber so as adjust its diametral expansion, the ring being characterized in that the closure system ( 10 , 10 b , 11 , 12 , 12 ′, 13 ) includes means ( 10 , 10 b , 12 , 12 ′, 13 ) for reversibly locking and loosening the ring, said means comprising male means ( 11 ) and female means ( 10 , 10 b ) forming a cavity in which or against which the male means ( 11 ) can expand and become locked in reversible manner, thus making it possible, starting from the position in which the diameter of the ring is locked, to release the diameter of the ring momentarily by relative displacement between the two ends ( 5 , 5 ′), while nevertheless continuously forming a closed loop around the stomach.