Patent ID: 7959532

Claim:
A gearbox assembly for a gas turbine engine having a fan-turbine rotor assembly comprising: a nonrotatable support structure mounted about an engine centerline; a gear shaft mounted about said nonrotatable support structure for rotation about said engine centerline; an inner radial flange extending from said gear shaft; a planet carrier mounted for rotation about said engine centerline; and an outer radial flange which extends from said planet carrier for rotation relative to said inner radial flange, said outer radial flange including a radial mount section, an axial fan hub section which extends transverse to said radial mount section, and an outer radial seal section which extends transverse to said axial fan hub section, said outer radial seal section at least partially radially overlapping said inner radial flange to form a hydraulic seal, said outer radial flange mountable to the fan-turbine rotor assembly for rotation therewith to mount said fan-turbine rotor assembly to the gearbox assembly.