Patent ID: 6260799
Filing Date: 2001-07-17
Classification: B64C

Abstract:
An aircraft wing fold actuation system for folding an outboard wing section relative to an inboard wing section between a deployed position and a stored position, the system comprising:a crank link pivoted to the inboard wing section at a first pivot point for rotation about an axis between first and second angular positions relative to the inboard wing section;a ground link extending between the inboard and outboard wing sections, the ground link being fixed to the inboard wing section to prevent relative movement therebetween, the outboard wing section being pivoted to the ground link at a second pivot point for movement between the deployed and stored positions, the second pivot point being spaced from the first pivot point;a follower link connected to the outboard wing section for movement therewith relative to the inboard wing section between the deployed and stored positions;a coupler link extending between the crank link and the follower link, the coupler link pivoted to the follower link at a third pivot point spaced from the second pivot point, the coupler link pivoted to the crank link at a forth pivot point spaced from the first and third pivot points, the crank and coupler links being within 5.degree. of crank link rotation of a toggle position with the crank link in the first position and the outboard wing section in the deployed position, the crank and coupler links being within 15.degree. of crank link rotation of another toggle position with the crank link in the second position and the outboard wing section in the stored position; andan actuator having an output drivingly connected to the second link to transmit torque to the second link to pivot the second link between the first and second positions.