Patent ID: 7003841

Claim:
A surface treating machine, comprising: a frame ( 1 ) and a chassis ( 2 , 3 ) to enable the machine to move over a surface (S) including a floor; at least one axle having wheels connected to the chassis; a head ( 5 ) pivotally connected to the frame by a first lever arm ( 8 ) of a two armed lever ( 7 ) and supported by the frame, the head comprising means ( 6 ) for directly contacting, scrubbing or maintaining said surface, a second arm ( 9 ) of the two armed lever connected to the axle; the head ( 5 ) being freely movable up and down with respect to the chassis ( 2 , 3 ) and is loaded downwardly by a pressure to adapt to the level of the surface; characterized in that at least a part of the pressure on the head ( 5 ) is pivotally derived from the weight of the machine composed of the frame and chassis, and part of the weight of the machine is pivotally distributed to the axle.