Process for producing sealing rings from expandable graphite
US5795518A · kind A · utility
4Cited by
2References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Dec 19, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/915
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Expanded graphite sealing rings having particles of PTFE captured at least in a surface layer are disclosed. The sealing rings are produced by impregnating porous rings, cut from a sheet of low density expanded graphite, with a PTFE dispersion and then compressing the rings to a desired final density. Impregnation is accomplished in the presence of an electric field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.