EP 1128032 A2 20010829 - Double-walled structure and method of producing the same
Title (en)
Double-walled structure and method of producing the same
Title (de)
Doppelwandige Struktur und Verfahren zu seiner Herstellung
Title (fr)
Structure à double paroi et procédé pour sa fabrication
Publication
Application
Priority
SE 0000559 A 20000222
Abstract (en)
A double-walled-structure, such as a silencer for use in a ventilation duct system, comprises a perforated inner tube (10), an outer casing (30) which is arranged at a distance from the inner tube (10) and encloses the same, and a tubular, sound-absorbing element (20) which is arranged between the inner tube (10) and the casing (30). The tubular element (20) has an increasing density radially outwards from the centre axis (C) of the inner tube (10). The silencer (1) is produced by the sound-absorbing element (20) being arranged on the inner tube (10), and the inner tube (10) with the sound-absorbing element arranged thereon being enclosed in the surrounding outer casing (30). <IMAGE>
IPC 1-7
IPC 8 full level
F01N 1/24 (2006.01); F01N 13/18 (2010.01); F24F 13/02 (2006.01); F24F 13/24 (2006.01)
CPC (source: EP US)
F01N 1/24 (2013.01 - EP US); F01N 13/18 (2013.01 - EP US); F24F 13/0245 (2013.01 - EP US); F24F 13/0263 (2013.01 - EP US); F24F 13/0281 (2013.01 - EP US); F24F 13/24 (2013.01 - EP US); F24F 2013/242 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1128032 A2 20010829; SE 0000559 D0 20000222; SE 0000559 L 20010823; SE 515765 C2 20011008; US 2001015302 A1 20010823
DOCDB simple family (application)
EP 01850037 A 20010221; SE 0000559 A 20000222; US 78997901 A 20010221