Method and apparatus for forming plastic lined junction in lined pipe
US3968552A · kind A · utility
Inventor
Key dates
| Filing date | Oct 24, 1974 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Oct 24, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49446
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed are methods and apparatus for effecting a fully lined junction between the end faces of two joints of plastic lined pipe. An annular groove is formed in the outer surface of the pipe at a predetermined distance from the end of the pipe joint and a ring fitted within the groove. A rigid flange having an internal shoulder which mates with the external surface of the pipe joint and the ring and which has a radially extending face is positioned over the ring and the end of the pipe joint so that the radially extending face lies in the same plane as the end face of the pipe. An end face liner having a cylindrical body which mates with the internal dimensions of the pipe liner and a radially extending flange is bonded within the open end of the pipe so that the radially extending flange mates with both the end face of the pipe and the radially extending face of the rigid flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.