PASSAGE OF A TRANSIT LINE THROUGH A CONDUIT CONTAINING BENDS

摘要

A transit line to be passed through a conduit having a series of straight sections and bends has a multiplicity of propulsive bodies positioned along the length thereof. The propulsive bodies are activated so as to move the transit line along the straight sections and around the return bends of the conduit. The multiplicity of such propulsive bodies serves to overcome the capstan effect that would otherwise impede the passage of the transit line through the conduit.