Device for moving a pig through a conduit, such as a pipeline, and sealing means for a device of this type
US6381797B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Apr 20, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/46
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device for moving a pig through a conduit, such as a pipeline, is proposed, comprising at least one pulling element with at least one sealing means. The sealing means comprises a supporting structure with variable circumference with at least one sealing element disposed on the circumference of the supporting structure. In a preferred embodiment, the supporting structure comprises supporting arms disposed substantially radially and being pivotable about axes, each perpendicular to the longitudinal central axis of the pulling element, and is mounted to the pulling element via the supporting structure and a central sleeve which can be fixed to the pulling element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.