Muffler apparatus and method for making same
US4632216A · kind A · utility
32Cited by
21References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1984 |
| Grant date | Dec 30, 1986 |
| Priority date | — |
| Expiry date | Jun 27, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2490/02
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention is directed to muffler apparatus and a method for making same. The apparatus includes inlet and outlet tubes with a plurality of baffles extending from the inlet and outlet tubes to a housing. The outlet tube has a constricted portion near its inlet end formed with creases and lobes and a flare at the end. Such constriction increases the housing to outlet tube area ratio of the muffler which results in advantageous attenuation characteristics. The process for making the muffler is simpler than known methods since the outlet tube is formed and baffles pressed onto it in a single step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.