Hydrodemolition machine for inclined surfaces

An apparatus for removing concrete from a wall, said apparatus comprising:

• a) a frame assembly comprising:
• i) a bottom region;
• ii) a first vertical support;
• and
• iii) a second vertical support, wherein said first vertical support and said second vertical support define a front region of said frame assembly, the front region being positioned adjacent the wall;
• b) a carriage assembly extending from said first vertical support to said second vertical support;
• c) at least one nozzle assembly mounted on said carriage assembly and operative to move along said carriage assembly between said first vertical support and said second vertical support, said nozzle assembly comprising:
• i) at least one nozzle, said nozzle adapted to emit a jet of fluid against the wall with sufficient velocity to remove concrete from the wall, wherein said nozzle is rotatable about a first axis that is substantially parallel to a plane of said front region and substantially perpendicular to said carriage assembly;
• ii) at least one first nozzle actuator operative to position said nozzle a selected distance from the wall;
• and
• iii) at least one second nozzle actuator operative to rotate said nozzle about the first axis, whereby the jet of fluid emitted by said rotated nozzle is directed toward a side of an opening in the wall;
• d) at least one nozzle assembly driver means for moving said nozzle assembly back and forth along said carriage assembly;
• e) a transporting assembly means for raising and lowering said carriage assembly along said front region of said frame;
• and
• f) wherein said bottom region is supported by a deck or platform.