High pressure water cleaner for ascension pipes

In a coke oven battery comprising coke oven chambers having at least one ascension pipe for each such chamber, an improved apparatus for cleaning the inner surfaces of said ascension pipe, comprising:

• a. a carriage that is movable along the top of said coke oven battery in proximate relation to said ascension pipes;
• b. a first arm pivotally mounted, at one end, to said carriage;
• c. a second arm pivotally mounted, at one end, to said carriage and disposed in spaced apart relation to said first arm;
• d. sprockets rotatably mounted, one each to said first and second arms, to the second ends of said first arm and said second arm;
• e. a chain anchored at one end to said carriage and cooperating with said sprockets;
• f. nozzle carrying means connected to the other end of said chain;
• g. a plurality of spray nozzles mounted to said nozzle carrying means;
• h. fluid carrying flexible conduit communicating with said nozzles for delivering water thereto, said conduit being supported by said chain;
• i. cylinder-piston means secured to said carriage and to said first arm for pivoting said first arm and sprocket mounted thereon away from and toward said ascension pipes so that said nozzle carrying means and said nozzles are positionable above each selected ascension pipe;
• j. power means for rotating one of said sprockets to raise and lower said nozzle carrying means and said nozzles into said ascension pipe and out of said ascension pipe;
• and
• k. means connected to said first arm for retarding movement of said nozzle carrying means when said nozzle carrying means is inoperative.