http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1943876-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f2f5b66443ba8fbcc1f5857a02d1a688 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ad68395cc506624ac5501658a6644489 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R9-045 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R2400-07 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R7-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R9-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R9-041 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R9-027 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04R9-06 |
| filingDate | 2006-11-02^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2011-03-09^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_49e1b86d2311db8cc6e29bfec3c03221 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f458d97d1e5f920ed14460cd8a75ebe3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_85fe6a4fa62b7989e0dc111d246346d3 |
| publicationDate | 2011-03-09^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1943876-B1 |
| titleOfInvention | Electrodynamic transducer including a dome with a ferrofluid suspension |
| abstract | The invention relates to an electrodynamic transducer (1) having a dome membrane (2) comprising an electrodynamic motor with a coil (6) which is supported by a mandrel (3) that is solidly connected to the membrane which is suspended from a frame (7). The aforementioned coil is disposed in a gap in which it can move and which is defined at the centre by an inner magnetic structure (4) and at the periphery by an outer magnetic structure (5). According to the invention, the suspension does not contain a peripheral suspension nor an inner suspension. The inventive transducer comprises at least two means (11) for confining the magnetic field in the gap in order to form at least two tiered ferrofluidic seals (12, 13, 14) in the gap using a ferromagnetic liquid, such as at least to guide the coil and to form a pneumatic seal between the front and rear faces of the membrane, at least one of said ferrofluidic seals being continuous. The invention is suitable for loudspeakers. |
| priorityDate | 2005-11-03^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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