Autonomous coverage robot

  • US 8,726,454 B2
  • Filed: 05/09/2008
  • Issued: 05/20/2014
  • Est. Priority Date: 05/09/2007
  • Status: Active Grant
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First Claim
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1. A surface treatment robot comprising:

  • a chassis having forward and rear ends;

    a drive system carried by the chassis and configured to maneuver the robot over a cleaning surface, the drive system comprising right and left driven wheels;

    a vacuum assembly carried by the chassis, the vacuum assembly comprising a collection region engaging the cleaning surface, a suction region in fluid communication with the collection region, the suction region configured to suction waste from the cleaning surface through the collection region, a squeegee attached to the chassis and formed with a longitudinal ridge disposed proximate to the cleaning surface and extending across a cleaning width for providing a liquid collection volume at a forward edge of the ridge, and a vacuum chamber partially formed by the squeegee disposed proximate to the longitudinal ridge and extending across the cleaning width, the vacuum chamber in fluid communication with the liquid collection volume by a plurality of suction ports defined by the squeegee, above the longitudinal ridge;

    a collection volume carried by the chassis and in fluid communication with the vacuum assembly for collecting waste removed by the vacuum assembly;

    a supply volume carried by the chassis and configured to hold a cleaning liquid;

    an applicator carried by the chassis and in fluid communication with the supply volume, the applicator configured to dispense the cleaning liquid onto the cleaning surface substantially near the forward end of the chassis; and

    a wetting element carried by the chassis and engaging the cleaning surface to distribute the cleaning liquid along at least a portion of the cleaning surface when the robot is driven in a forward direction, the wetting element arranged substantially forward of a transverse axis defined by the right and left driven wheels, and the wetting element slidably supporting at least about ten percent of the mass of the robot above the cleaning surface.

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