Metal-covered sealing gasket having a soft, heat resistant, expandable core
US5269540A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1992 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Mar 30, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/936
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a metal-covered gasket in which a soft core member (2, 12, 22, 32, 42, 52) containing unexpanded or expanded vermiculite is covered with a metallic sheet (3, 13A, 13B, 23A, 23B, 33A, 33B, 43, 53A, 53B). There are provided good sealing properties by the soft core member mainly composed of inorganic fibers and treated unexpanded vermiculite the expansion amount and expansion force of which are increased due to ion exchange by treatment with chemicals, or by the soft core member solely made of expanded vermiculite. Reinforcing metallic sheets (44, 54) for restraining the vermiculite from transversely sliding and for further improving the entire shape retention may be embedded in the soft core member or laminated on the surface thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.