Patent ID: 7074009

Claim:
A casing assembly for the turbine ( 1 ) of an exhaust turbocharger, comprising: a) a spiral casing ( 1 . 2 , 1 . 3 ) adapted to surround the running wheel ( 1 . 1 ) of a turbine; b) a tongue-like wall part ( 1 . 5 ) in the inside of the spiral casing; c) an inlet connection; d) an outlet connection ( 5 ); e) a flange or sleeve ( 1 . 6 ) to connect the spiral casing to a bearing casing; f) wherein at least the spiral casing is formed from an exhaust flow conducting sheet metal ( 1 . 2 , 1 . 3 ); g) wherein the thickness of the sheet metal is between 0.2 and 2 mm; and h) wherein the sheet metal is surrounded by insulation.