Dual containment pipe system and a manhole system
US6123110A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/283
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dual containment pipe system suitable for installation into an existing conduit includes a new secondary containment pipe with a plurality of substantially uniform internal studs and a new primary containment pipe up against the studs. An annular space is formed between the pipes by the studs which provides space along the length of the conduit for installation of leak detection systems including cables or perforated conduits for removing liquids or purging the annulus. The impervious new primary containment pipe may be cured in place, folded and formed, diameter reduced pipe, or any other pipe suitable for pipeline rehabilitation. A manhole system for connection of service laterals to the main line pipe which maintaining dual containment utilizing closure pieces for the main line coupled to a bellow fitting and service lateral riser tee is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.