APPLIANCE FOR CLEANING AND/OR PRESERVING THE SIDE OF A SHIP OR OTHER LARGE VERTICAL OR INCLINED SURFACES

摘要

A vehicle is movable along the upright outer surface of a ship's wall in a horizontal path. A mast on the vehicle extends upwardly along the surface and has an upper end portion, the mast being extensible and retractable. An evacuable container is provided on the upper end portion of the mast displaceable at least with reference to and along the surface and having an open side facing and adapted for fluid-tight contact with a registering portion of the surface. Nozzle means is arranged within the container and operative for dispensing a treating medium through the open side onto the registering portion of the surface.