US Patent 10357140 Autonomous wall cleaner

An autonomous wall cleaner is disclosed. The autonomous wall cleaner comprises a vacuum generator, a number of suction cups, a number of wheels, a number of first actuators, a cleaning element and a controller located on a frame. The wheels are symmetrically arranged on both sides of the frame. The first actuator is capable of driving the wheels. Each suction cup is connected with the vacuum generators and has a sliding disk and an elastic bowl. When the wheels are moving on the wall, the suction cups are sucking to the wall and sliding.