Patent ID: 8438684

Claim:
An apparatus for cleaning a surface which is immersed in a liquid, comprising: a body, at least one electric motor which is carried by said body and which comprises a drive shaft, at least one guiding and driving member mechanically connected to the drive shaft and arranged so as to move the body over the immersed surface in an instantaneous drive orientation, at least one liquid inlet into the body, at least one liquid outlet out of the body, a filtering device for filtering at least some liquid passing through the inlet, an electric control unit which is configured to control the at least one electric motor, and means, comprising at least one non-steering non-driving rolling guiding member rotatably mounted relative to the body about a transverse axis generally orthogonal to the instantaneous drive orientation, for applying a gyration torque of the apparatus for at least one movement configuration of the apparatus on the immersed surface.