Patent ID: 7681601

Claim:
A rotating thermal machine comprising: an inner casing comprising a hollow cylinder defining an axis; said hollow cylinder having a diameter contour with a diameter varying along said axis and forming different blade ducts; said hollow cylinder being divided at a parting plane, the parting plane extending though the cylinder axis, the cylinder including a lower casing part and an upper casing part, the casing parts detachably connected to one another in the parting plane; wherein the two casing parts have, in the region of the parting plane, two overlapping areas which lie opposite each other and in which region the two casing parts overlap one another and are detachably connected to one another with overlapping sections; wherein the two casing parts have a predefined wall thickness; and wherein the sum of the thicknesses of the overlapping sections is approximately the same as the wall thickness of the two casing parts in the overlapping areas.