Patent ID: 9561845
Date: 2017-02-07
CPC Classifications: B64C,F16C

Claim:
1. An edge flap arrangement for an aircraft wing, the arrangement comprising: a main flap element and an actuator for moving the main flap element relative to the aircraft wing; a linkage arrangement supporting the main flap element from the aircraft wing for movement relative to the aircraft wing, the linkage arrangement including a fixed strut secured to the aircraft wing and a drop link secured to the main flap element, the fixed strut and the drop link being pivotally connected by a hinge point; and at least a first hourglass bearing disposed in at least one of the hinge point and the actuator, the first hourglass bearing comprising: comprising, a cage disposed between the inner raceway and the outer raceway, the cage comprising; an annular ring having a first axial face and a second axial face, a plurality of first rails extending the length from the first axial face and a plurality of second rails extending the length from the second axial face, the length being of a magnitude greater than that of the axial width of the hour glass rollers, a plurality of pockets, each of the plurality of pockets defined by opposing circumferentially facing walls of at least one of adjacent pairs of the first rails and adjacent pairs of the second rails, and the circumferentially facing walls being concavely formed so that each of the plurality of pockets is cylindrical.