Method for producing a sound-dampened automotive enclosure
US5271142A · kind A · utility
26Cited by
11References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1992 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Nov 30, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49906
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for making a sound-dampened automotive enclosure, such as an oil pan, having a metal constraining layer, a metal housing layer, and a viscoelastic layer sandwiched therebetween. In a preferred embodiment, the constraining layer and viscoelastic layer are between the housing layer and the die while the housing layer is being drawn. This results in a very close and snug fit between the layers, leading to enhanced sound-dampening effectiveness. The article thus produced is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.