Title:
SOUND-ABSORBING HOLLOW BODY FOR AN AIR SUPPLY
Document Type and Number:
WIPO Patent Application WO2004007108
Kind Code:
A3
Abstract:
Hollow bodies for an air supply often prove unsatisfactory in terms of their sonic properties or their dirt accumulation behaviour. The invention relates to a sound-absorbing hollow body for an air supply, comprising a first external layer consisting of closed-cell polyolefin foam, a second internal layer consisting of closed-cell polyolefin foam and at least one additional layer, located between the internal and external layer and having a surface structure consisting of fibres, in particular a nonwoven. The inventive sound-absorbing hollow bodies are used in particular in the motor vehicle industry for air supplies.
Inventors:
BREITSCHEIDEL ULRICH (DE)
ULB HORST (DE)
ULB HORST (DE)
Application Number:
PCT/EP2003/050299
Publication Date:
April 01, 2004
Filing Date:
July 09, 2003
Export Citation:
Assignee:
TROCELLEN GMBH (DE)
BREITSCHEIDEL ULRICH (DE)
ULB HORST (DE)
BREITSCHEIDEL ULRICH (DE)
ULB HORST (DE)
International Classes:
B29C49/00; B32B27/32; F01N1/24; F01N13/16; F02M35/12; F16L9/21; F16L55/02; F16L55/033; B21D; (IPC1-7): B32B27/32; F02M35/12; F16L55/033; F16L9/21
Foreign References:
| FR2214723A1 | 1974-08-19 | |||
| DE19807411A1 | 1999-08-26 | |||
| FR2744510A1 | 1997-08-08 | |||
| DE29711763U1 | 1998-11-05 |
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