Patent ID: 8435000

Claim:
A variable vane actuation system comprising: a ring member disposed for pivoting movement about a centerline axis and operably connected with at least one vane such that said at least one vane pivots in response to the pivoting movement of said ring member; a ring moving device engaged with said ring member at first and second positions spaced from one another about said centerline axis and operable to apply first and second forces, respectively, at said first and second positions to move said ring member, the ring moving device including: a torque tube rotatable about a tube axis; a clevis mounted on said torque tube to rotate about the tube axis and having first and second arms projecting outward from the clevis, the first and second arms configured to interact with the ring member and transmit the first and second forces; wherein a torque useful to change orientation of the torque tube and thus orientation of the ring member is received by the torque tube other than through a torque produced via the first and second forces; and rotational movement of the torque tube in one direction produces rotational movement in the one direction in the ring member at both said first and second positions.