Inflatable internal pipe obturator with hardenable core
US4436120A · kind A · utility
10Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1982 |
| Grant date | Mar 13, 1984 |
| Priority date | — |
| Expiry date | Jun 15, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K7/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to an internal obturator for a pipe, particularly for a hydrocarbon conveying pipe-line, which comprises a central core and a flexible inflatable sleeve surrounding the core, wherein the central core comprises a flexible casing filled with a hardenable material which is hardened after its introduction into the flexible casing. The hardenable material may be hardened before or after insertion of the obturator into a pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.