The disclosure relates to a road paver with a height-adjustable screed for installing a pavement layer and at least one support device for carrying and positioning at least one sensor unit. The support device comprises a center bar, at least one extension bar for the center bar, and at least one attachment unit which detachably attaches the extension bar at one end of the center bar. The center bar and the extension bar are by way of the attachment unit relative to one another—when viewed in the vertical projection plane—at a first mounting angle connectable to one another, and the center bar and the extension bar are by way of the attachment unit connectable to one another—when viewed in the vertical projection plane—at at least one further mounting angle.

The disclosure relates to a road paver with a height-adjustable screed for installing a pavement layer and at least one support device for carrying and positioning at least one sensor unit. The support device comprises a center bar, at least one extension bar for the center bar, and at least one attachment unit which detachably attaches the extension bar at one end of the center bar. The center bar and the extension bar are by way of the attachment unit relative to one another—when viewed in the vertical projection plane—at a first mounting angle connectable to one another, and the center bar and the extension bar are by way of the attachment unit connectable to one another—when viewed in the vertical projection plane—at at least one further mounting angle.

The disclosure relates to a road paver with a paving screed with an adjustable height for installing a road surface layer and at least one holding device for carrying and positioning of at least one sensor unit, wherein the holding device has at least one swivel arm module for fastening the holding device on the road paver, at least one carrier arm module and at least one sensor module comprising the sensor unit, wherein the carrier arm module is fastened by means of a first clamping device on the swivel arm module and the sensor module by means of a second clamping device on the carrier arm module, and wherein the first and the second clamping device are formed respectively for a predetermined clamping force when the respective clamping devices are in a closed position.

The disclosure relates to a road paver with a paving screed with an adjustable height for installing a road surface layer and at least one holding device for carrying and positioning of at least one sensor unit, wherein the holding device has at least one swivel arm module for fastening the holding device on the road paver, at least one carrier arm module and at least one sensor module comprising the sensor unit, wherein the carrier arm module is fastened by means of a first clamping device on the swivel arm module and the sensor module by means of a second clamping device on the carrier arm module, and wherein the first and the second clamping device are formed respectively for a predetermined clamping force when the respective clamping devices are in a closed position.

A new and improved method and apparatus for use in conjunction with the free floating paving screed used for road paving is disclosed. The method of forming a bituminous mixture into a smooth flat paved mat comprising some areas with a given nominal mat density and some selected areas with a predeterminedly higher mat density is described wherein problems posed by a reduced compaction ratio occurring subsequently to paving the mat where the roller drum bridges over recesses in the subbase are addressed. The modified paving screed described employs a new adjustable screed plate that allows localized areas of increased angle of attack and a device to increased material entry density in localized areas in front of a screed plate leading edge. Either method is used to create an increase in mat density in the desired area. The method and apparatus teach that by pairing differences in compaction ratio that inherently occur due to subbase irregularities with correspondingly predetermined and different mat densities in the paved mat, a good consistent final density can be achieved notwithstanding the limitations of the compaction rolling. A forward looking vision system is described that identifies subbase recesses, a digital controller quantifies the density increase required, and a GPS system maps locations where the mat density increases are to be applied.

A new and improved method and apparatus for use in conjunction with the free floating paving screed used for road paving is disclosed. The method of forming a bituminous mixture into a smooth flat paved mat comprising some areas with a given nominal mat density and some selected areas with a predeterminedly higher mat density is described wherein problems posed by a reduced compaction ratio occurring subsequently to paving the mat where the roller drum bridges over recesses in the subbase are addressed. The modified paving screed described employs a new adjustable screed plate that allows localized areas of increased angle of attack and a device to increased material entry density in localized areas in front of a screed plate leading edge. Either method is used to create an increase in mat density in the desired area. The method and apparatus teach that by pairing differences in compaction ratio that inherently occur due to subbase irregularities with correspondingly predetermined and different mat densities in the paved mat, a good consistent final density can be achieved notwithstanding the limitations of the compaction rolling. A forward looking vision system is described that identifies subbase recesses, a digital controller quantifies the density increase required, and a GPS system maps locations where the mat density increases are to be applied.

A paving machine for spreading, leveling and finishing concrete having a main frame, center module, bolsters laterally movably, and a crawler track associated with respective aft and forward ends of the bolsters. A bolster swing leg for each crawler track supports an upright jacking column. A worm gear drive permits rotational movements of the crawler track and the jacking column. A hinge bracket is interposed between each swing leg and a surface of the bolsters to enable pivotal movements of the swing leg. A length-adjustable holder engages the pivot pin on the hinge bracket and pivotally engages the swing leg. The holder permits pivotal motions of the swing leg in its length-adjustable configuration and prevents substantially any motion of the swing leg in its fixed-length configuration. A feedback loop cooperates with transducers keeping the crawler tracks position. The paving machine can be reconfigured into a narrowed transport configuration.

A paving machine for spreading, leveling and finishing concrete having a main frame, center module, bolsters laterally movably, and a crawler track associated with respective aft and forward ends of the bolsters. A bolster swing leg for each crawler track supports an upright jacking column. A worm gear drive permits rotational movements of the crawler track and the jacking column. A hinge bracket is interposed between each swing leg and a surface of the bolsters to enable pivotal movements of the swing leg. A length-adjustable holder engages the pivot pin on the hinge bracket and pivotally engages the swing leg. The holder permits pivotal motions of the swing leg in its length-adjustable configuration and prevents substantially any motion of the swing leg in its fixed-length configuration. A feedback loop cooperates with transducers keeping the crawler tracks position. The paving machine can be reconfigured into a narrowed transport configuration.

An apparatus for steering and driving a concrete screed having a frame and a screed head secured thereto includes a plurality of spaced drive wheels rotatably and pivotably secured to the frame at a plurality of points, and a steering member coupled to one or more of the drive wheels for controlling the directional orientation thereof.

A screed assembly for a paving machine includes a main screed unit having a first section and a second section. A hinge assembly located above the main screed unit pivotally couples the first section with the second section. The first section and the second section rotate around a horizontal axis passing through the hinge assembly. A seal member located between the hinge assembly and the main screed unit covers a gap defined between the first section and the second section below the hinge assembly such that the seal member covers the gap and laterally extends beyond the gap above the first section and the second section. A pair of heating components attached to the first section and the second section heats the first section and the second section.