07571511 is referenced by 174 patents and cites 335 patents.

An autonomous floor-cleaning robot comprises a self-adjusting cleaning head subsystem that includes a dual-stage brush assembly having counter-rotating, asymmetric brushes and an adjacent, but independent, vacuum assembly such that the cleaning capability and efficiency of the self-adjustable cleaning head subsystem is optimized while concomitantly minimizing the power requirements thereof. The autonomous floor-cleaning robot further includes a side brush assembly for directing particulates outside the envelope of the robot into the self-adjusting cleaning head subsystem.

Title
Autonomous floor-cleaning robot
Application Number
10/818073
Publication Number
7571511 (B2)
Application Date
April 5, 2004
Publication Date
August 11, 2009
Inventor
Paul E Sandin
Randolph
MA, US
David M Nugent
Newport
RI, US
Newton E Mack
Somerville
MA, US
Joseph L Jones
Acton
MA, US
Agent
Fish & Richardson P C
Assignee
iRobot Corporation
MA, US
IPC
A47L 9/28
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