Patent ID: 6766556
Filing Date: 2004-07-27
Classification: A47L

Abstract:
An apparatus for cleaning a surface comprising:a cleaning head for applying a liquid onto the surface and cleaning same; a vacuum head for removing a mixture of used liquid, air and particles from the surface under a vacuum action; means for separating the used liquid, air and particles from the mixture respectively and containing the separated particles; a fan device for generating the vacuum action of the vacuum head; a used liquid container for containing a volume of the used liquid separated from the mixture; and a single liquid passage adapted to be connected at a first end to an external liquid supply and drain system, the single liquid passage having valve means at a second end thereof for establishing selective fluid communication of the single liquid passage with one of the cleaning head and the used liquid container, so that the liquid can be supplied to the cleaning head and the used liquid can be withdrawn from the used liquid container alternately through the single liquid passage.