Apparatus for cleaning surfaces

An apparatus for cleaning surfaces by impinging a stream of liquid thereon, the apparatus comprising:

• a housing with opposed inlet and outlet opening and a chamber therein communicating with the openings;
• means for supplying pressurized liquid through the inlet opening and into the chamber;
• a nozzle floating in the housing, the nozzle being disposed between the inlet and outlet openings and including a front end with a rounded abutment surface, the front end having a discharge opening therethrough;
• the nozzle further including a drive coupling integral therewith and in rigid association therewith;
• means in said housing operated by fluid pressure from the inlet and connected to the drive coupling of the nozzle for oscillating the nozzle;
• a rounded concave bearing surface inside of the housing aligned with the outlet opening of the housing and facing the inlet opening of the housing;
• the rounded abutment of the nozzle engaging the bearing surface and being urged thereagainst by the fluid pressure applied through the inlet opening in the housing, and the bearing surface having an opening therethrough in communication with the discharge opening in the front end of the nozzle;
• whereby liquid in the housing is dispensed in oscillating fashion through the aligned openings while the nozzle pivots on the concave bearing surface.