Patent ID: 8056932

Claim:
A corner accessory for placing at the junction between at least two ducts that extend in different directions, the accessory comprising two distinct flaps, one of which includes a projecting element and the other of which includes a circular opening receiving said projecting element to allow said flaps to pivot about a pivot axis, the circular edge of said opening opening out locally to a straight slot that extends radially relative to the circular edge of said opening and that opens out into a free edge of said other flap, a resilient assembly tab being defined by one edge of the slot, by a portion of the circular edge of said circular opening, and by a portion of the free edge of said other flap into which said slot opens out, wherein said projecting element is a cylindrical wall presenting firstly an outside diameter equal, ignoring clearance, to the inside diameter of said circular opening so that during pivoting of one flap relative to the other, the outside face of said cylindrical wall slides over an edge face of the circular edge of said opening, and presenting secondly a height that varies around its circumference so that during assembling the two flaps together, the assembly tab slides on a sloping edge of the cylindrical wall extending between a minimum height of the cylindrical wall and a maximum height of the cylindrical wall and elastically bends along the sloping edge until the cylindrical wall is received within the circular opening.