Clamping collar

A clamping collar having a substantially cylindrical metal belt, a pair of projecting lugs having respective facing front portions, a tightening rod disposed in holes in said lugs, and two tightening members co-operating with said rod and with respective ones of bearing portions of the two lugs in the pair to move the lugs closer together in such a manner as to cause the belt to be tightened by reducing the diameter of said belt, the bearing portion of at least a first one of the lugs being formed in an extension of said first lug, which extension is folded over towards the rear of said first lug, away from the other lug in the pair, and is provided with a hole for the tightening rod, which hole is situated facing a hole in the front portion of the first lug, a bracing space being provided between the folded-over extension and said front portion;

• of the first lug,
• the extension and the front portion of the first lug being interconnected via a strip portion forming a link loop defining an axial tunnel having two open axial ends, said tunnel being shaped so that an angle of inclination between the extension and the front portion of the first lug can change when the collar is tightened.