Obturating device, especially for injection tubes
US3984988A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Oct 23, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to an obturating device more particularly designed for operating with a cavity such as an injection tube. Said device comprises a hollow body adapted to be connected with a duct for feeding a fluid under pressure to be injected, such as a cementitious grout. The body is provided with outlet ports at the vicinity of at least one of its ends, said end being covered by a flexible and resilient sleeve tightly engaged over the body and covering said outlet port. The said sleeve is provided with a comparatively thick bottom located between said end and a backing-piece, the assembly being arranged to be introduced in the injection tube or cavity with such a clearance that deformation of the bottom of the sleeve or sleeves under the effect of the pressure of the fluid ensures obturation of said tube or cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.