Global Patent Index - EP 1943876 B1

EP 1943876 B1 20110309 - ELECTRODYNAMIC TRANSDUCER INCLUDING A DOME WITH A FERROFLUID SUSPENSION

Title (en)

ELECTRODYNAMIC TRANSDUCER INCLUDING A DOME WITH A FERROFLUID SUSPENSION

Title (de)

ELEKTRODYNAMISCHER WANDLER MIT EINER KUPPEL MIT EINER EISENFLUID-SUSPENSION

Title (fr)

TRANSDUCTEUR ELECTRODYNAMIQUE A DOME A SUSPENSION FERROFLUIDE

Publication

EP 1943876 B1 20110309 (FR)

Application

EP 06831314 A 20061102

Priority

  • FR 2006051132 W 20061102
  • FR 0553330 A 20051103

Abstract (en)

[origin: FR2892887A1] The transducer has an electrodynamic motor with a coil (6) supported by a mandrel (3). The mandrel is connected to a dome (2) suspended from a frame (7) e.g. basket assembly. The coil is disposed in a gap, in which the coil is defined at a centre by an inner magnetic structure (4) and at periphery by an outer magnetic structure (5). Confinement units (11) confine magnetic field in the gap to form tiered bilateral seals (12) in the gap using a ferromagnetic liquid for guiding the coil and forming a pneumatic seal between the front and rear faces of the dome.

IPC 8 full level

H04R 9/06 (2006.01)

CPC (source: EP)

H04R 7/20 (2013.01); H04R 9/027 (2013.01); H04R 9/041 (2013.01); H04R 9/06 (2013.01); H04R 9/045 (2013.01); H04R 2400/07 (2013.01)

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

DOCDB simple family (publication)

FR 2892887 A1 20070504; FR 2892887 B1 20071221; AT 501601 T 20110315; DE 602006020606 D1 20110421; EP 1943876 A1 20080716; EP 1943876 B1 20110309; US 2008285788 A1 20081120; US 8131005 B2 20120306; WO 2007051948 A1 20070510

DOCDB simple family (application)

FR 0553330 A 20051103; AT 06831314 T 20061102; DE 602006020606 T 20061102; EP 06831314 A 20061102; FR 2006051132 W 20061102; US 9259106 A 20061102