Robotic vacuum cleaning system

  • US 9,320,400 B2
  • Filed: 12/31/2014
  • Issued: 04/26/2016
  • Est. Priority Date: 04/29/2011
  • Status: Active Grant
First Claim
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1. An autonomous coverage robot comprising:

  • a chassis having forward and rearward portions;

    a drive system supported by the chassis and configured to maneuver the robot over a cleaning surface; and

    a cleaning assembly supported by the chassis, the cleaning assembly comprising;

    a roller housing;

    a first roller rotatably mounted to the roller housing and defining a first longitudinal axis, the first roller being rotatable about the first longitudinal axis in a first direction; and

    a second roller rotatably mounted to the roller housing rearward of and substantially parallel to the first roller, the second roller defining a second longitudinal axis and being rotatable about the second longitudinal axis in a second direction opposite of the first direction;

    wherein the second roller is spaced from the first roller to form an air gap therebetween; and

    wherein the first and second rollers are each resiliently compressible to allow passage of an object having a dimension larger than the air gap between the first and second rollers when the first and second rollers are counter-rotating in the respective first and second directions.

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