An in-pipe vehicle for carrying out at least one operation in a pipeline. The vehicle includes a train of modules interlinked by suspension units to allow serpentine movement through pipe bends. The vehicle train has its own internal power supply and drive mechanism in the modules. A detector module...http://www.google.de/patents/US6031371?utm_source=gb-gplus-sharePatent US6031371 - Self-powered pipeline vehicle for carrying out an operation on a pipeline and method
