Patent ID: 7861352
Filing Date: 2011-01-04
Classification: A47L

Abstract:
1. An autonomous cleaning appliance comprising: a housing; a dirt container disposed in the housing and including a first dirt inlet in a first side of the dirt container, wherein the dirt container does not communicate with a suction source; a first brushroll chamber disposed in the housing and communicating with the first dirt inlet; a first brushroll disposed in the first brushroll chamber; a first motor disposed in the housing for driving the first brushroll; a power drive assembly mounted in the housing for propelling the appliance, the power drive assembly including a first tread assembly disposed on a first side of the housing, and a first drive motor operatively connected to the first tread assembly; a control device for regulating the operation of the first motor and the power drive assembly in an autonomous manner; a bumper mounted to the housing; and a bumper plate contacting the housing, the bumper plate being attached to the bumper such that at least a portion of the housing is sandwiched between the bumper plate and the bumper.