Method of repairing or replacing piping and inflatable plug
US4827984A · kind A · utility
8Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Apr 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3724
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of repairing piping by inserting an inflatable plug 30 through a pressure housing 28 and valve 24, inflating the plug and then inserting a screwed sealed plug 47 into a special flange 49 which is attached to an existing pipe flange. The plug 30 has a sealing ring 36 with a tread 37 and segmented steel rings 38. After the plug is inserted the piping may be repaired or replaced and the inflatable plug deflated and removed with the screwed plug 47 by a system of rods extending through the valve and pressure housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.