Patent ID: 7765634

Claim:
A surface cleaning machine attachable to a cable of a crane for cleaning a surface, comprising: a body attachable to the cable of the crane; the body comprising a box including walls and defining an open side for facing the surface to be cleaned, an elastic seal around a perimeter of the open side of the box, and a device for extracting air from the box; brushes rotatably attached to the body; one or more brush actuators connected to the brushes; three or more main wheels rotatably attached to the body for bearing against the surface to be cleaned; and one or more additional wheels rotatably attached to the body, the additional wheels being positioned within the box of the body such that, when the main wheels bear against the surface to be cleaned and there is no pressure difference between an atmospheric pressure and a pressure inside the box of the body, the additional wheels are spaced from the surface; wherein the brushes and the main wheels are configured to define a flat plane for cleaning the surface during operation.