Rehabilitation of water supply pipes
US6644356B1 · kind B1 · utility
13Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2002 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jan 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1393
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Device for use in rehabilitation of water supply pipes includes a tubular liner (10) which is deployed through a pipe (11) for example by a line attached to a messenger pig which is propelled through the pipe. The liner (10) has a multi-lobed pleated cross-section, and is of a polyolefin elastomer material, e,g, a substantially linear ethylene inter-polymer. The liner is extruded and die drawn during extrusion to produce a reduced diameter highly oriented structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.