ROAD ROLLER Russian patent published in 1994 - IPC

FIELD: compaction of bituminous concrete and other road-building materials. SUBSTANCE: road roller comprises self-propelled chassis with compacting members, vacuum chamber connected with frame by link-and-lever suspension, vacuum-generating means in the form of power-operated perforated blade disc installed coaxially in vacuum chamber. Temperature and deformation pickups are disposed on disc mounted in flexible supports on internal surface of vacuum chamber wall. Control system has the form of control unit whose first and second inputs are connected, respectively, with pressure and temperature pickups while its third input, with deformation pickup across comparator whose output is connected to indicating unit. Output of control unit is connected to hydraulic cylinder control system. EFFECT: improved design. 2 dwg