Method for relining a branch conduit of a main conduit
US5752786A · kind A · utility
9Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Apr 2, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/18
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for relining an underground branch conduit (10) of an underground main conduit (11) by a relining pipe (14) in the form of a radially stiff double-walled pipe with a corrugated outer wall (14A) and a smooth elastic inner wall (14B) being inserted by use of a traction rope (22), a draw shoe (20) and a pressure plate (25). A stop element (27) is provided on the traction rope (22), which can be pressed against the draw shoe by the motion of the traction rope in relation to the draw shoe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.