EP 0798694 A3 20000301 - Cleanable low frequency sound attenuator for channels
Title (en)
Cleanable low frequency sound attenuator for channels
Title (de)
Reinigbarer Schalldämpfer (SD) für Kanäle für tiefe Frequenzen
Title (fr)
Atténuateur du son de fréquences bas nettoyable pour canaux
Publication
Application
Priority
DE 19612572 A 19960329
Abstract (en)
[origin: EP0798694A2] The channel (1) contains perforated pieces (3) of different lengths. These are connected with chambers (4) outside the channel which form sound absorbers. The channels and or pieces are made of sheet metal, plastics, concrete or brick. The chambers can be cleaned periodically or continuously by fixed or movable nozzles (9). The chambers are connected with pipes (8) for cleaning agent via valves or other adjustments (7).
IPC 1-7
IPC 8 full level
G10K 11/172 (2006.01)
CPC (source: EP)
G10K 11/172 (2013.01)
Citation (search report)
- [A] FR 873027 A 19420626 - EBERSPAECHER J
- [A] DE 1476629 A1 19690710 - WALKER MANUFACT COMPANY
- [A] DE 3807680 A1 19890921 - JEHLE NORBERT [DE]
- [A] DE 2821069 B1 19790628 - KAEFER ISOLIERTECHNIK
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0798694 A2 19971001; EP 0798694 A3 20000301; EP 0798694 B1 20030813; AT E247324 T1 20030815; DE 19612572 A1 19971002; DE 59710558 D1 20030918
DOCDB simple family (application)
EP 97104736 A 19970320; AT 97104736 T 19970320; DE 19612572 A 19960329; DE 59710558 T 19970320