Sub-muffler
US7896129B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 24, 2006 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Feb 9, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2310/02
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Provided is a sub-muffler which needs no heat resistant material such as SUS, and which can keep its durability and sound absorbing performance even when the sub-muffler is exposed to various corrosive components in the exhaust gas. At the same time, accomplished is a low-cost manufacture, which is a challenge that sub-mufflers and sound absorbing materials commonly face. Disclosed is a sub-muffler in which a perforated exhaust pipe is arranged, and caps and an out pipe are arranged outside the perforated pipe. Sound absorbing materials are filled in the space between the perforated exhaust pipe, and the caps and the out pipe. The sub-muffler is characterized in that, among the sound absorbing materials, at least part of the sound absorbing material of the perforated pipe side is a basalt fiber for high temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.