Sound dampened automotive enclosure such as an oil pan
US4851271A · kind A · utility
39Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Oct 1, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31692
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention concerns constrained layer sound damping. A composition and a laminated structure are provided for the reduction of noise coming from housings such as oil pans for automobiles. The composition comprises a rubbery polyurethane, an olefin polymer, and a filler. The laminated structure comprises the housing, the composition, and a sheet metal liner. The composition contains a blowing agent which is activated to provide a single unitary structure which dampens noise. The polyurethane and olefin polymer are thoroughly intermixed with each other, but maintain their separate identities in the blend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.