Patent ID: 7998425

Claim:
A structure for filtering particulate-laden gases, comprising an assembly of elements of the honeycomb type linked by a joint, each element incorporating a set of adjacent ducts or channels having mutually parallel axes and separated by porous walls, said ducts being closed off by plugs at one or the other of their ends so as to bound entry chambers that open onto a gas intake face and exit chambers opening onto a gas discharge face, in such a way that the gas to be filtered passes through the porous walls, said structure being characterized in that its geometrical center, in a cross section of the structure perpendicular to its main axis, does not correspond to a symmetry element of an element or of a group of elements in the assembly, and in that it answers to the following geometrical characteristics: if 0<D≦3×L e +4×L j or if 4×L e +5×L j ≦D≦4.25×L e +4×L j or if 6×L e +5×L j ≦D≦7×L e +6×L j or if 8×L e +7×L j ≦D≦8.5×L e +6×L j , then d is between 0 exclusive and 0.1×L j ×L e , and if 3×L e +4×L j ≦D≦3.5×L e +5×L j or if 4.25×L e +5×L j ≦D≦5×L e +5×L j or if 5.6×L e +3×L j ≦D≦6×L e +5×L j , then d is between 0.2×L j ×L e and 0.35×L j ×L e , where D is the segment having the greatest distance joining two points of the filter envelope and passing through the geometrical center of the filter, or even through the main axis of symmetry of the filter, d is the distance between the center of the element located in the central position in the assembly and the geometrical center of the filter, Le is the width of a whole unit element and Lj is the average thickness of the joint.