Noise suppressor apparatus for a gas duct
US7117973B2 · kind B2 · utility
42Cited by
14References
14Claims
0Family size
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Inventor
Key dates
| Filing date | Jun 21, 2004 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Jun 21, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E50/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A sound damping device (4) for a tubular duct (2), particularly a gas transporting tract of an internal combustion engine (1) having a least one bypass channel (5) running parallel to a main duct (6) in a section of the duct (2). The bypass channel (5) is longer than the main duct (6) between a branching off point (7) and a re-entry inlet (8). The bypass duct according to the invention is configured as a spiral duct (5) which winds around the centrally disposed main duct (6) in order to decrease the installation space requirements for the noise suppressor (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.