Pipe cleaning method and device

A device for use in cleaning deposits from the inside of a pipe, said device comprising:

• a body in the shape of a hollow cone adapted for location in the pipe for restricting liquid flow through the pipe, said body being radially inwardly collapsible against a radially outwardly bias such that said body may be introduced into the pipe through an opening substantially smaller in diameter than the diameter of the pipe and thereafter expand to substantially the diameter of the pipe;
• said body being further adapted for forcing liquid flow radially outward from the body toward an area adjacent the pipe wall;
• a plurality of flow passages positioned substantially radially about said body and adjacent the pipe wall for allowing a substantial flow of the radially outwardly forced liquid past said body;
• a tether for adjustably holding said body in position against the liquid flow through the pipe, thereby increasing the flow rate of liquid through said passages;
• and
• a winch for paying out said tether to allow said body to pass through the pipe at a rate slower than the unrestricted liquid flow in the pipe.