Patent ID: 8257051

Claim:
A rotor hub for a rotary wing aircraft, comprising: a yoke having a plurality of yoke arms, adjacent yoke arms being joined together by a yoke strap, the yoke arms and the yoke straps defining a central void space, the void space being adapted to receive a central shaft therethrough; at least one pitch horn having a pitch horn inboard beam and a pitch horn arm, wherein the pitch horn is pivotally connected to the yoke and the pitch horn inboard beam is substantially disposed within the central void space; a constant velocity joint adapted to transfer force from the central shaft to the yoke and wherein the constant velocity joint is substantially disposed within a central void space, the constant velocity joint having a plurality of drive links coupled to the central shaft; and a hub spring having an upper outer shell being resiliently connected to an inner shell with an inner core, the upper outer shell being coupled to the plurality of drive links, wherein the hub spring is configured to transfer rotational forces from the central shaft, via the plurality of drive links, through the upper outer shell, to the yoke; wherein the upper outer shell is coupled to an upper surface of the yoke, thereby permitting a pitch link to be coupled to the pitch horn within the central void space.