Patent ID: 8671507

Claim:
A floor cleaning robot, comprising: a housing having an underside, a substantially semi-circular front portion, and a substantially semi-circular rear portion; a displaceable bumper comprising a substantially semi-circular unitary leading edge located along the semi-circular front portion of the housing; a leading wheel mounted on the underside of the housing located adjacent to a mid-point of the semi-circular unitary leading edge of the bumper; a battery pack cover positioned rearwardly of the leading wheel and covering a well in the underside of the housing receiving a battery pack that supplies power to the robot; at least two drive wheels positioned rearwardly of the leading wheel and rearwardly of the battery pack cover, mounted within wells in the housing, and configured to be retracted when moving over a surface to be cleaned; at least one cleaning brush, at least a portion of which is positioned rearwardly of the at least two drive wheels and configured to rotate about an axis substantially parallel to the underside; at least one side brush having at least two arms extending outwardly from a central hub located in a recess in the underside of the housing, the at least one side brush being positioned substantially between the leading wheel and the at least two drive wheels in a direction of forward movement of the robot and attached to the hub such that rotation of the hub causes the side brush to direct debris from a floor surface beyond the semi-circular leading edge of the robot housing for collection by the robot; and a removable dust cartridge having a surface forming at least a portion of a semi-circular trailing edge of the housing.