Loudspeaker-and-pre-stressed cabinet
US6628797B2 · kind B2 · utility
6Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 17, 2001 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2888
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an improved loudspeaker comprising a pre-stressed cabinet and a loudspeaker unit fixed to the inside of the cabinet. The cabinet comprises a hollow conical assembly including two conical bodies of high-rigidity metal, one press-fitted into the other by applying an increased compressive force. The hollow conical assembly has front and rear plates closing its front and rear openings. These front and rear plates are pulled toward each other by tightening screw rods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.