Patent ID: RE39422

Claim:
A brushless surface cleaner, comprising: a vehicle having at least one drive system for propelling said vehicle on a surface to be cleaned; a cleaning head mounted to said vehicle to extend forward therefrom, said cleaning head having a deck and a skirt extending from said deck wherein, when said skirt is placed in contact with the surface to be cleaned, a cleaning volume is bounded by said deck, said skirt and the surface to be cleaned; said cleaning head having at least one vent port formed in a forward portion thereof and at least one vacuum port formed in a rear portion thereof; a plurality of nozzles mounted to said deck for movement between said forward portion and said rear portion within said cleaning volume when liquid under pressure is supplied thereto and sprayed therefrom; a liquid supply system mounted on said vehicle for supplying said liquid under pressure to said plurality of nozzles wherein the surface to be cleaned is effectively scrubbed by said liquid to produce a mixture of said liquid and contaminants loosened from the surface to be cleaned; and a vacuum recycling system mounted on said vehicle and coupled to said at least one vacuum port for suctioning said mixture, filtering said mixture to separate said liquid from said contaminants and returning said liquid so-separated to said liquid supply system for reuse thereby.