Apparatus for carrying out repair works on a damaged pipeline which a person cannot get through

Apparatus for carrying out repair work on a damaged pipeline which a person cannot get through, said apparatus comprising a self-propelled carriage;

• a television camera mechanically coupled to the carriage for finding and locating areas to be repaired in the pipeline;
• and a tool holder pivotable about the longitudinal axis of the carriage for holding an exchangeable tool that is arranged transversely to said longitudinal axis, said tool holder including a working head rotatable by at least one full turn, said working head comprising a feed cylinder displaceable transversely to the longitudinal axis and having a drive for a shaft and means arranged on said shaft for clamping the exchangeable tool, said working head further comprising a hydraulic cylinder device that displaces the feed cylinder transversely to the longitudinal axis of the carriage independently of the rotational position of the working head;
• wherein there is provided on an outside of one face of the carriage a bearing for receiving the working head, said bearing being rotatable by a drive arranged on an inside of said one face, said bearing having an L-shaped cross section and a shackle rigidly connected thereto for rotation therewith, the working head abutting with one face against the bearing and being supported by the shackle between two ends thereof at two points on opposite sides of the working head which are located substantially in a plane passing through the longitudinal axis of the shaft on which the tool clamping means and the tool are arranged.