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. 10, 2015
Filed:
Jan. 28, 2011
Marco Schneider, Essen, DE;
Dirk Jaeger, Dortmund, DE;
Volker Kursch, Essen, DE;
Edmund Sumann, Witten, DE;
Norbert Nicolai, Schernbeck-Gahlen, DE;
Volkmar Schulze, Schierling, DE;
Marco Schneider, Essen, DE;
Dirk Jaeger, Dortmund, DE;
Volker Kursch, Essen, DE;
Edmund Sumann, Witten, DE;
Norbert Nicolai, Schernbeck-Gahlen, DE;
Volkmar Schulze, Schierling, DE;
HP Pelzer Holding GmbH, Witten, DE;
Abstract
The invention relates to a broadband sound absorber () which comprises a sound-absorbing filler material between two microperforated film webs () which are contiguous on their edges, said filler material optionally containing heavy fillers. The broadband sound absorber () achieves excellent acoustic insulation and has microperforations () all over or only in sections, said filler material optionally containing heavy fillers (mass density) and one or both microperforated film webs () having the same thickness across their surface or thickened portions () of the same or a different material in some sections.