Chemical conversion plug to achieve gas tightness
US5271550A · kind A · utility
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1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1993 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | May 3, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49352
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for sealing the gap between adjacent boiler tubes of a panel wall thereby making the panel wall air-tight. First and second sealing members are secured to opposite sides of adjacent boiler tubes thereby defining a gap therebetween. This gap is then filled with a metal salt solution which is dried in place so as to leave a residue behind. Subsequently, this residue is further heated which converts it to a metal oxide that forms an air-tight ceramic plug. This plug possesses properties which make it resistant to deterioration once the panel wall goes into service.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.