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:
Mar. 16, 2010
Filed:
Apr. 04, 2006
Gabriele Tocchi, Sesto San Giovanni, IT;
Phillippe Pierre Godano, Winterthur, CH;
Bertrand Francois Delmas, Meulan, FR;
Jan Horak, Winterthur, CH;
Tommy Goran Falk, Freienstein, CH;
Karim Bouteraa, Jambville, FR;
Alexander Wildhaber, Walenstadt, CH;
Gabriele Tocchi, Sesto San Giovanni, IT;
Phillippe Pierre Godano, Winterthur, CH;
Bertrand Francois Delmas, Meulan, FR;
Jan Horak, Winterthur, CH;
Tommy Goran Falk, Freienstein, CH;
Karim Bouteraa, Jambville, FR;
Alexander Wildhaber, Walenstadt, CH;
Rieter Technologies, AG, Winterthur, CH;
Abstract
The invention relates to a thin sound absorbing multi-layer assembly, which is intended, in particular, to reduce interior or exterior noise of a motor vehicle. The assembly according to the invention comprises at least three stacked layers consisting respectively of: a first layer () being impervious and having an area weight of between (20) to (100 g/m2); a second layer () having an air flow resistance of between (250) to (2500 Ns/m3) and an area weight of between (15) to (250 g/m2); a third layer () being an open pored, acoustic spring type layer having a thickness of between (2) to (30 mm) and an area weight of between (50) to (1000 g/m2).