Audio speaker and method for assembling an audio speaker
US7266214B2 · kind B2 · utility
2Cited by
8References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Nov 3, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio speaker includes a driver unit having a magnetic pole case defining a radial gap, a vibration system having a diaphragm and a voice coil where the vibration system is fixed to the drive unit and the voice coil is movably mounted into the radial gap, and a residual magnetic fluid layer disposed on the surfaces of one or more of the magnetic pole case and the voice coil where an air gap exists between the voice coil and the magnetic pole case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.