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. 29, 2008
Filed:
Dec. 08, 2003
Hameed S. Khan, Crown Point, IN (US);
James H. Fisher, North Manchester, IN (US);
Steven D. Tessendorf, Schererville, IN (US);
Peter Ehrler, Reinheim, DE;
Hameed S. Khan, Crown Point, IN (US);
James H. Fisher, North Manchester, IN (US);
Steven D. Tessendorf, Schererville, IN (US);
Peter Ehrler, Reinheim, DE;
Rieter Technologies AG, Winterthur, CH;
Abstract
An ultra light, noise reducing composite () comprises an acoustically transparent, light weight film () between an underlay layer () and an air flow resistance layer (). This composite allows to easily tune the acoustic properties by balancing the absorption and sound transmission behaviour of the composite (). This air flow resistance layer () has an air flow resistance of between 500 Ns/m3 and 10,000 Ns/m3 and an area mass between 200 g/m2 and 3,000 g/m2. The underlay layer () has a stiffness value in the range between 100 Pa and 100,000 Pa. The light weight film () may consist of a synthetic foil and preferably has a thickness of 0.01 mm.