Exhaust silencing device
US5898140A · kind A · utility
7Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Sep 25, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2470/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In an exhaust silencing device having inner tubes which are connected to an exhaust pipe connected to an engine and provided with a plurality of through holes, and an outer tube which covers the inner tubes. The occurrence of a whistling sound is prevented while avoiding the use of a sound absorbing material. Recesses or indentations, are provided on the inner surface of the inner tube, which, together with the outer tube, form an annular expansion chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.