Device for plugging the interior of a pipe
US5531250A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1994 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | May 5, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/124
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus for plugging the interior of a pipe that is penetrated by an axis opening including an upright tubular plugger housing attachable at its lower end to have communication with the interior of the pipe through the opening. An elongated vertical cylindrical control bar is provided with a plugger at its lower end, the plugger being positioned through the opening into the interior of the pipe to close against further flow of fluid through the pipe. A jack is affixed to the plugger housing upper end and telescopically receives the control bar, the jack being pivotally affixed to the housing so that the control bar, having a plugger on the lower end thereof, can be pivoted relative to the housing and thereby relative to the pipe for proper positioning of the plugger in the pipe. The jack serving to axially downwardly or upwardly advance the control bar so that a plugger can be installed or removed from a pipe, the jack providing force to expand a sealing cup on the plugging head to seal the inside of the pipe. A control bar clamp and latch are used for locking the plugger head in the plugging position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.