Method of cutting apertures in lining in underground pipes
US4577388A · kind A · utility
68Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Nov 9, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/304424
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for re-establishing side connections to an underground pipe after the same has been lined with a rigid lining of synthetic resin is disclosed, and in the method a cutter of the unit located in the pipeline moves in accordance with a pre-programmed contour which matches the contour of the side connection, thereby effectively and quickly to re-establish the side connection. The pre-programmed arrangement may be generated by sensing the side connection profile prior to the lining operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.