Lining of pipelines or passageways
US5393481A · kind A · utility
57Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1992 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Sep 10, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1788
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The lining of a lateral pipe which leads into a main pipe is achieved by everting a resin impregnated tubular lining through an elbow in the main pipe, eversion being accomplished by a fluid under pressure supplied through a pressure pipe, the elbow being held in position by an inflatable bag which is inflated by said fluid, the bag sealing the lateral/main pipe junction, and the bag being such that at least one additional pressure pipe may extend past the seal arrangement so that at the same time that the first mentioned lateral lining is curing a second lateral may be similarly lined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.