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:
Jul. 11, 2000
Filed:
Feb. 25, 1999
Osmin Regis Delverdier, Montastruc la Conseillere, FR;
Patrick Gonidec, Montivilliers, FR;
Jacques Michel Julliard, Hericy, FR;
Bernard Louis Le Barazer, Le Havre, FR;
Eric Lecossais, Virville, FR;
Georges Jean Riou, Melun, FR;
Philippe Jean Vie, Toulouse, FR;
Societe Nationale d'Etude et de Construction de Moteurs d'Aviation, , US;
Ateca, Montauban, FR;
Hispano-Suiza Aerostructures, Paris, FR;
Abstract
A soundproofing panel comprises a honeycomb core sandwiched between a solid skin and a porous skin, the cells of the honeycomb being divided in the direction of its thickness into at least two resonant cavities by a least one partition which is traversed by passages interlinking the cavities. The partitions are formed by a plurality of hollow microbeads having porous walls, the microbeads being bonded to one another and to the walls of the honeycomb at their points of contact. Such a soundproofing panel combines high performance in terms of linearity as a function of the level of sound excitation, attenuation band, bulk and mechanical strength.