Underwater pipeline sealing apparatus
US4498811A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1982 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Feb 17, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L1/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Apparatus for preventing flow of water from a first underwater pipeline portion forward of the apparatus to a second underwater pipeline portion rearward of the apparatus. At least one wedge-shaped member is mounted on a carriage of the apparatus for grippingly engaging the internal wall of a pipeline for preventing movement of the apparatus in a rearwardly direction upon application of force to the carriage urging the carriage in a rearwardly direction in the pipeline. In order to provide frictional contact with the pipeline wall so that gripping engagement thereof may be effected, the member is continually urged into sliding engagement with the pipeline wall during movement of the apparatus through the pipeline in a forwardly direction. The apparatus is further provided with an annular elastomeric member responsive to water pressure from forwardly of the apparatus for sealingly engaging the pipeline wall to prevent flow of water from the first underwater pipeline portion to the second underwater pipeline portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.