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:
Feb. 11, 2020
Filed:
Apr. 26, 2018
Safran Aircraft Engines, Paris, FR;
Norman Bruno Andre Jodet, Maisons-Alfort, FR;
Jeremy Paul Francisco Gonzalez, La Chappelle Rablais, FR;
Jacky Novi Mardjono, Nogent sur Marne, FR;
Georges Jean Xavier Riou, Melun, FR;
SAFRAN AIRCRAFT ENGINES, Paris, FR;
Abstract
An acoustic absorber cell () for mounting on a turbojet wall in contact with a fluid flow, the cell () having a resonant cavity () presenting a wall () having at least one orifice () associated with a neck () having a tube () extending inside the resonant cavity () and projecting from the wall (). The neck () also having a tubular ring () coaxial with the tube () and movable relative to the tube (), and the cell () includes electromagnetic actuator () for moving the ring () along the tube (), and controller () for controlling the electromagnetic actuator () and configured to control movement of the ring () along the tube () as a function of the operating speed of the turbojet between at least first and second positions defining respective first and second resonant frequencies of the resonant cavity ().