Flexible graphite/metal multilayer gaskets suited to high-temperature service conditions
US7989049B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 2007 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Jan 28, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31699
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates generally to a composite plate produced by an alternating stack of (n+1) flexible graphite foils and (n) perforated metal reinforcing foils with spurs (where n≧2). The thicknesses of the flexible graphite foils used are preferably such that any 2 mm slice of thickness of the composite plate comprises at least 3 layers of flexible graphite, and has a graphite density per unit area of at least 2.34 kg/m2. For each perforated metal reinforcing foil, the spurs present on the foil generally have a height in relation to the surface of that foil that does not exceed about 1.3 times the thickness of the thinnest of the flexible graphite layers to which it is attached. A composite plate of the present invention enables the manufacture of gaskets that resist temperatures up to 550° C. under continuous service.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.