Method for rehabilitating low pressure service mains connections
US6505783B1 · kind B1 · utility
3Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2000 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Jul 17, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/1645
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for internally sealing live low pressure residential gas supply lines, including gas main tap and associated fittings, by applying sealant to the inside surface of the gas line. Sealing assemblies allow tapping and insertion of tools without gas escape to atmosphere, as well as application of sealant under gas pressure passed through a supply line which has the ability to rotate in order to feed itself through elbows and fittings to the point where sealing is required, as well as achieve uniform spray coverage of the target pipe's inner surface with sealant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.