Damped heat shield
US5590524A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1994 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Jun 13, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2260/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A damped heat shield for a high temperature portion of a vehicle exhaust system. The heat shield has inner and outer metal layers of substantially different thicknesses and substantially different resonant frequencies, which causes the shield to damp vibrational energy and reduce radiated sound energy and noise. Between the metal layers is a layer of sound and heat shielding material such as aluminum foil or ceramic fiber paper. The metal layers are preferably stainless steel, cold rolled steel, aluminized steel, aluminum-clad steel, or aluminum. If cold rolled steel is used, the exterior of the shield is preferably coated with a corrosion-resistant coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.