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 a 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 a rear of said first lug, away from a second lug in the pair, and is provided with a hole for the tightening rod, said hole being 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, and
• wherein the extension has two bracing side cheeks, while the front portion of the first lug has two stiffening lips that extend towards the extension and that are formed on respective ones of two axially opposite edges of said front portion, and free edges of the bracing side cheeks extend against inside faces of respective ones of said lips.

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 a 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 a rear of said first lug, away from a second lug in the pair, and is provided with a hole for the tightening rod, said hole being 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, and
• wherein the front portion of the first lug has two stiffening lips that extend towards the extension and are formed on respective ones of two axially opposite edges of said front portion, and an end of each lip that is further from an axis of the collar carries a holding tab that is folded over into the axial tunnel.