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:
Nov. 11, 2008
Filed:
Apr. 13, 2004
Hans Rudolf Czerny, Swisttal, DE;
Christian Gnädig, Mechernich, DE;
Herbert Vollmert, Nettetal, DE;
Albert Kallenberg, Hürth, DE;
Hans Rudolf Czerny, Swisttal, DE;
Christian Gnädig, Mechernich, DE;
Herbert Vollmert, Nettetal, DE;
Albert Kallenberg, Hürth, DE;
Carcoustics Tech Center GmbH, Leverkusen, DE;
Abstract
The invention relates to an acoustically effective wheel house covering for vehicles, i.e. a wheel house covering which can reduce transmission of splash water noises in the passenger compartment of the vehicle and which can absorb the sound of rolling tires on a roadway, which wheel house covering comprises several layers of material. In order to improve the sound-absorbing effect of such wheel house coverings, it is proposed that the wheel house covering is formed of at least three air-permeable sandwiched layers of material () comprising a first textile material layer () facing the wheel housing, with the air permeability of said first textile material layer at a test pressure of 1 mbar ranging from 15 to 60 l/ms, and with the air permeability of a second textile material layer () arranged between the first () and third () material layers at a test pressure of 1 mbar ranging from 100 to 1500 l/ms, wherein the third material layer () is a textile material layer facing the tire, with the air permeability of said third material layer at a test pressure of 1 mbar ranging from 20 to 200 l/ms.