Method and apparatus for installation and repair of insulated line pipes
US9212776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2010 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | Mar 24, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for installation and repair of insulated piping includes placing a sleeve coupling, made of a weldable polymer material incorporating a slit that runs lengthwise along the piping, and whose length exceeds the distance between the outer pipes' ends, over the exposed section of the inner pipe so as to overlap the ends of the outer pipes, and welding the sleeve coupling to the outer pipe at the ends of the outer pipes, by placing an electrically conductive band between the outer pipe and the sleeve coupling, ensuring that free ends of the band project upward through the slit. A power converter which has a quasi-resonant converter is employed to produce the electric current that is to be connected to the band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.