Atmosphere control for photographic pipeline inspection
US4434427A · kind A · utility
12Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1982 |
| Grant date | Feb 28, 1984 |
| Priority date | — |
| Expiry date | Jan 5, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B37/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device is disclosed which includes a camera pig and a tow pig having an articulated connection therebetween to permit movement through pipe bends. The tow pig includes a syphon device for projecting liquids upwardly and forwardly and also includes a compressor and a desiccant chamber for drying of gas which is injected into a camera space between cups of the camera pig. A flow path is provided through the camera pig which by-passes the camera space, for maintaining a passive environment therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.