Patent · US Expired

Sound absorbers

US7137477B2 · kind B2 · utility

31Cited by

13References

18Claims

0Family size

Assignee

Clion Ireland Holding Ltd. · IE

Inventors

Hans-Peter Keller · Oberdürnten, CH
Marco Schneider · Austin, US
Olaf Dohring · Dortmund, DE
Rod Morris-Kirby · Lostwithiel, GB
Norbert Nicolai · Schermbeck, DE
Colm Doris · Waterford, IE

Key dates

Filing date	Dec 29, 2003
Grant date	Nov 21, 2006
Priority date	—
Expiry date	Feb 17, 2025

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60R13/0884
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The present invention relates to a sound absorber consisting of a first non-woven fabric facing towards the sound-emitting source having a layer thickness within a range of from 2 to 15 mm, a density within a range of from 50 to 500 kg/m3, a weight per surface area within a range of from 0.1 to 2.5 kg/m2, and a flow resistance within a range of from 50 to 1000 kNs/m4, and a second non-woven fabric facing away from the sound-emitting source has a layer thickness within a range of from 10 to 28 mm, a density within a range of from 20 to 100 kg/m3, a weight per surface area within a range of from 0.4 to 1 kg/m2, and a flow resistance within a range of from 10 to 40 kNs/m4.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.