Patent ID: 7918146

Claim:
A gearbox system comprising: a final stage output gear which defines a main rotor axis of rotation; a bevel face gear mounted to a first stage shaft for rotation about a bevel gear axis of rotation, said bevel gear axis of rotation parallel to said main rotor axis of rotation and located a radial distance from said main rotor axis of rotation less than a radius defined by said final stage output gear; a shaft spur gear mounted to said first stage shaft; a second shaft spur gear mounted to said first stage shaft; a first quill shaft assembly having a second stage spur gear meshed with said shaft spur gear, said first quill shaft assembly mounted for rotation about a first quill shaft axis of rotation; a second quill shaft assembly having a second stage spur gear meshed with said shaft spur gear, said second quill shaft assembly mounted for rotation about a second quill shaft axis of rotation; a third quill shaft assembly having a second stage spur gear meshed with said second shaft spur gear, said third quill shaft assembly mounted for rotation about a third quill shaft axis of rotation; and a fourth quill shaft assembly having a second stage spur gear meshed with said second shaft spur gear, said fourth quill shaft assembly mounted for rotation about a fourth quill shaft axis of rotation, said first, second, third and fourth quill shaft axis of rotation located at common radius greater than said radius defined by said final stage output gear.