Motor vehicle exhaust muffler
US5739485A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2510/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to an exhaust muffler for a motor vehicle, consisting of an external casing (1), an internal casing (2) and a central part (3) consisting of perforated tubing (4) and transverse partitions (5) assembled together to form a chicane, called the insides. The central part (3) is made of an enameled steel, the steel having the following composition in thousandths of a percent by weight: PA1 carbon between 0 and 100 PA1 manganese between 0 and 500 PA1 phosphorus between 0 and 30 PA1 sulfur between 0 and 40 PA1 aluminum between 0 and 60 PA1 titanium between 0 and 200 PA1 copper between 0 and 60 PA1 nitrogen between 0 and 15, the remainder being iron and residual impurities, said steel being obtained by hot rolling at a final rolling temperature exceeding the Ar.sub.3 point to obtain a strip, which is coiled at a temperature higher than 600 degrees Celsius and, after cold rolling, is subjected to a recrystallization annealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.