US Patent 7775742 Civil engineering compartmented roller

A roller for compacting a subsurface, in particular for road building, comprising a roller body with a central axis. The roller body is made up of a plurality of compartments (2), the compartments (2) being provided distributed in the circumferential direction around the central axis. In particular, each compartment (2) comprises at least one fluid chamber (3). More particularly, the fluid chambers (3) in the compartments (2) are in flow communication.