Method of making glass-to-metal seal (header)
US4445920A · kind A · utility
9Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1982 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Dec 20, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C27/046
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A metal-to-glass-to-metal seal that includes a chemical bond between the ss and metal as well as a mechanical seal is obtained by using an oxide layer which joins the glass and metal. A glass tube or glass powder with a coefficient of expansion which approximates the metal's coefficient of expansion is fitted between a pin and sleeve combination. Parts are then heated in a controlled dry hydrogen atmosphere to create a bond between the metal and glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.