Patent ID: 7055201

Claim:
A surface treating machine, comprising: a frame and an undercarriage to enable the machine to move over a surface (S) such as a floor or wall in a defined orientation with respect to the surface; a head supported by the frame, said head including: a drive motor; a single tool for directly contacting, scrubbing or treating said surface (S), said tool being rotatably drivable by means of the motor, said tool driving the machine; cardanic drive and coupling means connected to the tool in a rotationally fixed manner on one end and connected to the drive motor on another end; support and spring means for the tool, under which the tool is arranged, said support and spring means in use, forcing the tool against the surface (S) with a controlled uneven pressure distribution around a circumference of the tool; wherein the spring means is distributed around an axis of rotation of the support means, and is loaded such that the spring means substantially remain biased during their rotation around the axis of rotation of the support means.