Patent ID: 8245506

Claim:
An exhaust manifold, comprising: an outer envelope, the outer envelope comprised of an outer shell, at least one inlet flange connected to the outer shell and having at least one gas inlet orifice configured to be connected to a combustion engine, at least one gas outlet orifice, and an outlet flange connected to the outer shell and delimiting each gas outlet orifice; one or more internal ducts arranged inside the outer envelope and opening via the at least one gas outlet orifice; and an annular diaphragm that is impermeable to gases and is radially and axially deformable in a resilient manner, said annular diaphragm arranged around each of the one or more internal ducts between each of the one or more internal ducts and the outer envelope such that exhaust gases do not circulate in an inter-wall space delimited between said internal ducts and the outer envelope, wherein the annular diaphragm is interposed between the outlet flange and each of the one or more internal ducts, wherein a periphery of the annular diaphragm is connected to at least one of i) the outer envelope and ii) each of the one or more internal ducts, and wherein the one or more internal ducts are formed, at least over a main part of a length of each duct, of a ceramics material, and are each engaged through the at least one gas outlet orifice.