Cleaning heads

A cleaning head including a dished casing open at a base portion thereof, bearing means co-axially mounted on the dishes casing, a cleaning liquid supply tube axially rotatably extending though the bearing means and dished casing and connected to a source of cleaning liquid, a cleaning liquid supply arm extending radially from the cleaning liquid supply tube adjacent the base portion of the dished casing, a cleaning liquid discharge nozzle extending perpendicularly from the cleaning liquid supply arm adjacent the dished casing, means for rotating the cleaning liquid supply arm, means for dynamically balancing the cleaning liquid supply arm and means for movably supporting the dished casing with the base adjacent a surface to be cleaned, a first flexible skirt and a second flexible skirt mounted on the dished casing and extending toward the surface to be cleaned, with a region bounded by said first and second flexible skirts connected to exhaust means to produce a suction effect within the region relative to spaces external of the region both within the casing and outside the casing.