Method and apparatus for lining a pipe
US9163770B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Apr 30, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2035/0827
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method for rehabilitating a damaged section of a pipe without a need for a resin absorbent liner is provided. The method includes pumping a low viscosity material towards a damaged section of pipe and changing the viscosity prior to dispensing of the material. For example, the material may be partially cured prior to dispensing. The partially cured or higher viscosity material is compressed between an inflating bladder and interior wall of the pipe, and the material that is allowed to fully cure. The bladder either can then be removed from the pipe or could be allowed to maintain in the pipe providing a new interior surface for the repaired pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.