| CPC B08B 9/047 (2013.01) [B05B 1/10 (2013.01); B05B 15/652 (2018.02); B05B 15/72 (2018.02); B08B 3/04 (2013.01); B08B 9/0495 (2013.01); B08B 9/093 (2013.01); B08B 13/00 (2013.01); B08B 2209/08 (2013.01)] | 18 Claims |

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1. Apparatus for cleaning a surface with a liquid jet, the apparatus comprising:
a primary fluid conduit having a longitudinal axis and two ends, a fluid-intake end and a fluid-exit end;
a first motor-driven drive assembly configured to engage the primary fluid conduit and turn the primary fluid conduit about the primary-fluid-conduit longitudinal axis;
a first motor configured to engage the first motor-driven drive assembly;
a section of the primary fluid conduit being inside of an adjacent penetration sleeve;
a section of the penetration sleeve being inside of a piston sleeve;
the piston sleeve configured to engage the penetration sleeve and move the penetration sleeve back and forth along a penetration-sleeve linear path over a primary-fluid-conduit exterior surface;
an actuator configured to engage the piston sleeve and move piston sleeve back and forth along a piston-sleeve linear path;
a penetration-sleeve end being attached to an extension sleeve that has a first end and a second end;
the extension-sleeve second end being attached to a swivel rod that has a first end and a second end;
the primary-fluid-conduit fluid-exit end being attached to a fixed nozzle having a first end and a second end;
the fixed-nozzle second end being attached to a swivel nozzle;
the swivel-rod second end being attached to the swivel nozzle;
the swivel nozzle configured to pivot between a fully extended position and a fully retracted position as the swivel rod respectively extends and retracts as the penetration sleeve moves back and forth; and
a continuous fluid-flow channel that extends from the primary-fluid-conduit fluid-intake end through the swivel nozzle.
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