Internal grit blast weld joint cleaner
US4563841A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1984 |
| Grant date | Jan 14, 1986 |
| Priority date | — |
| Expiry date | Jun 22, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S118/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A machine for cleaning the interior uncoated surfaces surrounding the weld joints in an otherwise internally coated pipeline comprising a first plate mounted on the machine and extending transversely across the pipeline when the machine is disposed within the pipeline, a second plate mounted on the machine in spaced parallel relation with the first plate, a first resilient member mounted on the first plate and having a circular periphery for engaging the inner periphery of the pipeline wall, a second resilient member mounted on the second plate and having a circular periphery for engaging the inner periphery of the pipeline wall, the first and second plates with their attached resilient members forming a closed cleaning chamber sealed at its ends with respect to the pipeline, a hollow rotatable hub mounted on the machine and within the cleaning chamber and rotatable on an axis substantially co-axial with the longitudinal central axis of the pipeline, a plurality of hollow tubes extending radially outward from the hub and in communication with the interior of the hub, a motor for rotating the hub whereby air is forced outwardly through the tubes to create a partial vacuum within the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.