Rehabilitation of pipelines and passageways with a flexible liner using an inflatible bladder
US5706861A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1994 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Oct 20, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/163
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An assembly which can be inserted into a pipeline or passageway on which a curable resin impregnated flexible lining is placed about an inflatable bladder is provided. The bladder is mounted to one end of a core pipe and folded over on itself. Medium flowing in the pipeliner passageway can pass through the core pipe during a lining operation. The core pipe is of sufficiently rigid nature to withstand inflation pressure to move the lining tube into the pipeliner passageway surface by inflation of the bladder, but yet is sufficiently flexible and bendable so as to bend enabling it follow curbs and falls in the pipeliner passageway into which it is inserted. Temporary holding means restrain the liner during insertion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.