Patent ID: 8096130

Claim:
A gas turbine engine fuel injection assembly comprising: an internal fuel manifold being annular and extending around a central axis, the fuel manifold having a plurality of fuel nozzles disposed about a circumference thereof, each of said fuel nozzles being in fluid flow communication with at least two fuel conduits defined within the fuel manifold such that the fuel conduits of the fuel manifold deliver fuel flow to any one or more of the fuel nozzles at their respective circumferentially spaced apart locations about the annular fuel manifold, the fuel manifold comprising first and second ring portions cooperating to provide a manifold body and to define therebetween the at least two fuel conduits; wherein the first ring portion includes a first circumferentially-extending inner surface including a plurality of first walls cooperating to define a plurality of channels defined in the first circumferentially-extending inner surface, and the second ring portion includes a second circumferentially-extending inner surface including a plurality of second walls cooperating to define a plurality of channels defined in the second circumferentially-extending inner surface, the first and second circumferentially-extending inner surfaces sealingly engaging one another about their respective circumferences at least three separate sealing locations on each ring portion, at least two of said three sealing locations being radially offset from each other so that said sealingly engaged first and second circumferentially-extending inner surfaces define a step, the said sealing locations being disposed between adjacent said channels, the channels of each said ring portion and the at least three sealing locations cooperating to define the at least two fuel conduits within the manifold body; and wherein the at least two fuel conduits being sealingly separated from one another to provide independent fuel feeds to each of the fuel nozzles, an intermediate one of the at least three locations being disposed between the at least two fuel conduits, the ring portions being joined by a braze at said intermediate location in a manner preventing fuel leakage from one fuel conduit to another.