Patent ID: 8263010

Claim:
A device for removing pollution from the exhaust gases of a heat engine, comprising: a longitudinal outer casing ( 23 ) delimiting a passage for the flow of the exhaust gases; first and second pollution-removal members ( 18 , 20 ) mounted in series in the passage; and a holding sleeve ( 38 ) for holding the first pollution-removal member ( 18 ), said holding sleeve ( 38 ) being interposed between the first pollution-removal member ( 18 ) and the outer casing ( 23 ) and extending longitudinally at least over most of the length of the first pollution-removal member ( 18 ), the holding sleeve ( 38 ) being guided in the outer casing ( 23 ) and forming between the first and second pollution-removal members ( 18 , 20 ) a surface ( 40 , 86 ) for longitudinal abutment against which the first pollution-removal member ( 18 ) bears, wherein the outer casing ( 23 ) comprises i) a cylindrical wall ( 24 ) in which the first and second pollution-removal members ( 18 , 20 ) are placed, and ii) a divergent portion ( 26 ) rigidly secured to the cylindrical wall ( 24 ), and wherein the cylindrical wall ( 24 ) and the divergent portion ( 26 ) comprise respective free edges ( 60 , 78 ) which face each other and which are welded to each other and to the holding sleeve ( 38 ).