Ring shaped membrane for an electro-acoustical loudspeaker
US8141677B2 · kind B2 · utility
1Cited by
10References
16Claims
0Family size
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Key dates
| Filing date | Jul 25, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Jul 25, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2207/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Ring-shaped membrane for an electro-acoustical loudspeaker, where said membrane comprises two or more dome-shaped annulus concentrically arranged around a central portion through which an imaginary axis of symmetry passes, where an outer periphery of said membrane is suitable to be attached to a surround; where the central portion is attached to a tower, which again is fastened to the loudspeakers driver, wherein the angle between a plane being perpendicular to the axis of symmetry and the attachment of the membrane to the surround resp. the tower is in the interval 0° to 40°, most preferred around 30°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.