Inflatable plug for interiorly cylindrical conduits
US4526207A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1983 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Feb 15, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/134
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluid inflatable plug for interiorly cylindrical conduits includes a rigid cylindrical mandrel having an elastomeric tubular sleeve about the outer curved surface of the mandrel. The sleeve includes reinforcements which extend in opposite sense helical paths throughout the longitudinal extent of the sleeve. The sleeve is folded back over one of its ends to form a loop region upon assembly to the mandrel. The ends of the sleeve are sealingly retained to the outer surface of the mandrel. A passage are provided for admitting and exhausting pressurized fluid between the sleeve and the outer curved surface of the mandrel. The plug may include a fluid passage therethrough independent of the passage for admitting an exhausting pressurized fluid between the sleeve and the surface of the mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.