APPARATUS FOR REMOVING MATERIAL SUCH AS CONCRETE FROM UNDER WATER PIPELINES

摘要

Appts. for removing covering material e.g. reinforced concrete from underwater pipelines comprises a frame adapted to be clamped to the pipe-line, and at least one arcuately-shaped member for positioning a number of simultaneously-operable cutters in spaced relation circumferentially about the material covered pipeline, where the members are movable on the frame along the pipeline via a carriage arrangement. The carriage includes at least 1 guide which is rigidly attached to the frame and extends beyond and away from the clamp devices to act as a cantilever for supporting the cutters away from the points of attachment of the appts. to a pipeline.