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Grout and hard surface cleaning apparatus

  • US 5,898,970 A
  • Filed: 10/14/1997
  • Issued: 05/04/1999
  • Est. Priority Date: 10/23/1995
  • Status: Expired due to Fees
First Claim
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1. A grout- and hard-surface cleaner comprising:

  • a cleaning enclosure having a perimeter with a surface-covering bottom portion and an open interior volume having a vacuum-suction top portion;

    a water-blast nozzle positioned on the cleaning enclosure;

    the water-blast nozzle having an inlet means positioned externally from an outside periphery of the cleaning enclosure and having an outlet orifice positioned internally of said open interior volume of the cleaning enclosure;

    the outlet orifice having an outlet axis with an angular relationship and a distance relationship to an intended surface;

    a water-supply source having high supply pressure in combination with a water-supply outlet with a low cross-sectional area to provide a water-supply force;

    a high-pressure tube in fluid communication with a water-supply source and the inlet means for the water-blast nozzle;

    a surface seal having sealing capacity between a bottom edge of the perimeter of the cleaning enclosure and the intended surface;

    a wet vacuum to provide a maximum suction pressure to a volume defined by the cleaning enclosure;

    an air control valve in an air control orifice which controllably and directly communicates the open interior volume of the cleaning enclosure with a surrounding ambience; and

    a vacuum tube in fluid communication intermediate the wet vacuum and the vacuum-suction top portion of the open interior volume of the cleaning enclosure.

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