Abstract: A coupling device includes a first tension loop connected to a second tension loop. The first and second tension loops are moveable with respect to one another to establish open and closed positions. An interior surface is defined by the first and second tension loops in the closed position. A recess is defined by the interior surface. A first connecting flange clamping edge is defined by the first and second tension loops on a first side of the recess. A second connecting flange clamping edge is defined by the first and second tension loops on a second side of the recess. At a facing end, at least one of the first and second tension loops has an introduction surface abutting the second connection flange clamping edge, the introduction surface being beveled radially inwardly towards a central hole defined by the first and second tension loops.

Abstract: The invention is related to a coupling device (1) comprising at least two tension loops (102, 202) which are moveably connected to each other between an open and a closed position substantially in one level, which loops are provided with inwardly along said tension loops extending recesses (106, 205), and first and second connecting flange clamping edges (110, 209 and 111, 210, respectively) provided on each loop and situated on each side of said recesses, wherein said first edges are a first connecting flange (118) holding edges (110, 209) which are in the open and closed positions intended to hold in place and that said second edges are a second connecting flange (121) loosening edges (111, 210) which in the open position are intended to loosen.