Patent ID: 6385964
Filing Date: 2002-05-14
Classification: F02K,Y02T

Abstract:
A thrust reverser for a turbojet engine having a cowling defining a downstream external fan cowling and forming an outer boundary of a gas flow duct through which gases flow from a stationary upstream cowling portion to a stationary downstream cowling portion, the cowling having at least one reverse thrust opening between the upstream cowling portion and the downstream cowling portion and communicating with the gas flow duct, the thrust reverser having a plurality of displaceable assemblies, each displaceable assembly comprising:a displaceable cowling portion; a flap pivotally attached at an upstream portion to one end of a bracket, said bracket being rigidly attached at another end to an upstream portion of said displaceable cowling portion; a plurality of rolling elements supported at the upstream edge of the downstream cowling portion; a set of flow deflecting vane-cascades subtending said reverse thrust opening; wherein said displaceable assembly is moveable between a forward position wherein the displaceable cowling portion and the flap each subtend the upstream and downstream cowling portions such that said displaceable cowling portion forms a portion of the external fan cowling and the flap forms a portion of the outer boundary of the gas flow, and a reverse thrust position wherein the reverse thrust opening is uncovered and the displaceable cowling portion and the flap are displaced downstream such that said displaceable cowling portion extends downstream, parallel to the longitudinal engine axis and without interfering with said downstream cowling portion, and said flap engages in rolling contact with said rolling elements when said flap moves between the forward thrust position and the reverse thrust position and pivots so as to block the gas flow duct and redirect the gas flow outward though the vane-cascades.