Clamping collar with a transverse buckle

A clamping collar comprising a looped metal strap and a transverse buckle retained at a first end of the strap and forming, on the outer side of said first end, a passage through which a second end of the strap can be inserted over the first end, the second end of the strap as inserted in this way being suitable for being indented so as to co-operate with at least one of the elements comprising the transverse buckle and the first end of the strap, in order to be retained so that said second end of the strap is prevented from moving in the direction in which the diameter of the collar increases, the transverse buckle comprising:

• a first radially projecting outer tab, said first radially projecting outer tab having the shape of a hook having a stem carrying a head under which a recess is formed, said first radially projecting outer tab having an inner rib at a junction between the stem and the head thereof,
• a second radially projecting outer tab, wherein said first and second tabs extend from respective ones of the two longitudinal sides of the transverse buckle, it being possible for the second end of the strap to be inserted between said tabs,
• wherein said inner rib, in the vicinity of said head, presents a width so that said radially projecting outer tabs define between them, in the vicinity of said head, a width less than the width of the second end of the strap,
• wherein the second radially projecting outer tab has the shape of a hook having a stem carrying a head under which a recess is formed, analogous to the shape of a hook of the first radially projecting outer tab, it being possible for the second end of the strap to be inserted between the stems of said first and second radially projecting outer tabs,
• wherein the second radially projecting outer tab has an inner rib at a junction between the stem and the head thereof.