Autonomous surface cleaning robot for wet and dry cleaning

  • US 8,855,813 B2
  • Filed: 10/25/2011
  • Issued: 10/07/2014
  • Est. Priority Date: 02/18/2005
  • Status: Active Grant
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First Claim
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1. A surface treatment robot comprising:

  • a robot body having a forward portion and a rear portion;

    a differential drive system mounted on the robot body and configured to maneuver the robot over a cleaning surface;

    a controller in communication with the drive system and configured to differentially steer the robot;

    a proximity sensor responsive to an obstacle forward of the robot, wherein the controller is configured to alter a heading setting in response to a signal received from the proximity sensor indicating a potential obstacle;

    a cliff sensor responsive to a potential cliff, wherein the controller is configured to alter the heading setting in response to a signal received from the cliff sensor indicating a potential cliff; and

    a passive scrubbing element disposed across a cleaning width of about 10 cm to 40 cm such that a shear force is generated between the passive scrubbing element and the cleaning surface as the robot moves over the cleaning surface, wherein an average drag force between the surface treatment robot and the cleaning surface is up to about 40% of the weight of the surface treatment robot and the surface treatment robot has a mass of less than about 10 kg.

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