The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2001
Filed:
Jul. 19, 1999
Philippe Pierre Bouiller, Samoreau, FR;
Pierre-Yves Bourquin, Paris, FR;
Daniel Kettler, Chartrettes, FR;
Jean-Pierre Ruis, Le Chatelet En Brie, FR;
Other;
Abstract
An axially symmetric turbojet engine exhaust-nozzle includes a system for masking the exhaust jet, such system including inner hot flaps (,), hinging on a conical shell (,) and driven by a first control ring (,) powered by linear actuators (,), and outer cold flaps (,) hinging on an annular assembly (,) and driven by a second control ring (,) powered by linear actuators (,) to vary the angle of the cold flaps. The annular assembly (,) is axially displaceable by a third set of linear actuators (,). Each cold flap (,) comprises an inner skin (,) fitted with orifices (,) and hinging on the annular assembly(,) and an outer skin (,) spaced radially away of the inner skin (,) to define an air flow channel between the skins. When the annular assembly (,) is moved downstream by the third set of linear actuators (,), the outer skins (,) form a scoop introducing fresh air into the cold flaps (,), and said air is injected into the hot gas flow through the orifices (,) in the inner skin and other orifices (,) at the trailing edge (,) of the cold flaps to reduce the exhaust signature.