EP 1646263 A3 20080813 - Coaxial loudspeaker with waveform diaphragm
Title (en)
Coaxial loudspeaker with waveform diaphragm
Title (de)
Koaxiallautsprecher mit wellenförmiger Membran
Title (fr)
Haut-parleur coaxial avec membrane de forme ondulée
Publication
Application
Priority
DE 202004015635 U 20041007
Abstract (en)
[origin: EP1646263A2] The loud speaker has a wave shaped membrane (12) in front of a closed rear chamber in an oscillation system with at least one high energy permanent magnet, a front plate (16) and a coil arrangement which excites the magnet. The loud speaker also has a plate shaped axially magnetized magnetic element (10). The front plate is arranged in front of the membrane and has slits formed in it.
IPC 8 full level
CPC (source: EP)
H04R 1/24 (2013.01); H04R 9/025 (2013.01)
Citation (search report)
- [Y] JP S5575398 A 19800606 - VICTOR COMPANY OF JAPAN
- [Y] US 2004047478 A1 20040311 - COMBEST CHRISTOPHER [US]
- [A] DE 2003950 A1 19700910 - HEIL OSKAR
- [A] DE 20207154 U1 20020919 - GERKINSMEYER NORMAN [DE]
- [A] US 4056697 A 19771101 - HEIL OSKAR
- [A] WO 9907183 A1 19990211 - ALSOP GLENN RONALD [AU], et al
- [A] US 4228327 A 19801014 - SAWAFUJI TADASHI
- [A] DE 19913558 A1 19990930 - SONY CORP [JP]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1646263 A2 20060412; EP 1646263 A3 20080813; EP 1646263 B1 20100721; AT E475271 T1 20100815; DE 202004015635 U1 20041202; DE 502005009938 D1 20100902
DOCDB simple family (application)
EP 05020885 A 20050926; AT 05020885 T 20050926; DE 202004015635 U 20041007; DE 502005009938 T 20050926