Cabinet for loudspeaker
US4650031A · kind A · utility
16Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1986 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Feb 18, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2865
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cabinet for a loudspeaker is disclosed, which has a duct communicating the inside and outside of the cabinet. The duct includes a first duct section open to the inside of the cabinet and having a substantially constant sectional area and a second duct section extending from the first duct section toward the outside of the cabinet, the sectional area of the second duct section being gradually increased from the first duct section toward the outside of the cabinet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.