The disclosure relates to a floating screed type asphalt paver provided with extendable, retractable auxiliary screed units which, in their retracted positions, are mounted in front of the main screed and carry edger plates. By mounting the screed extensions in front of the main screed units, it is possible to retract the extension units without interrupting paving operations. A strike-off plate may be positioned in front of the extension units to limit the presence of paving material between th...

In a slip-form paver comprising a tractor (2) consisting of a machine frame (4) telescopable at least transversely to the traveling direction, with working means being mounted thereto, where at least one of the working means is displaceable along a longitudinal guide (56) across the entire working width transversely to the traveling direction, characterized in that the longitudinal guide (56) for the working means as a predetermined length and is supported at the machine frame (4) for free displ...

Steering apparatus and method is illustrated for a paving vehicle having variable displacement hydrostatic pumps supplying power to hydraulic motors on each side of the vehicle with controls for the pumps varying the speed of fixed directional traction means located on respective sides of the vehicle.

A roof paver element includes a plurality of ribs projecting from a planar body portion, the ribs terminating in bottom surfaces having rounded longitudinal boundaries. The ribs are connected to the planar body portion and to one another by fillets. Sides of the planar body portions include depressions which form pressure equalization chambers with the sides of the body portions of adjacent roof paver elements in a roof system to hinder the development of air pressure differentials between the r...

Apparatus for effecting a push pull driving connection between a pair of vehicles disposed in tandem relation with one end of each vehicle juxtaposed relative to the other. The apparatus has a rocking beam mountable on the juxtaposed end of one vehicle for pivotal movement thereon in a horizontal plane. Bumper rollers are carried by and project from said rocking beam in axially horizontal orientation for rolling engagement with the proximal wheels of said other vehicle whereby movement of one ve...

A paving apparatus is provided with a micropower impulse radar device connected to control a leveller. The leveller is a screed provided with actuators for adjusting screed elevation, slope, and extension. The radar senses a reference, such as a string line, and operates the actuators to adjust the screed.

A pull type asphalt paver for spreading asphalt onto a road surface is disclosed as having means to avoid dump truck damage to the paver during operation and transporting thereof, means to readily enlarge the width of an asphalt layer on a road surface, and means to facilitate the metering and control of asphalt discharged by the paver on a road surface.

A paver having hitch arms adapted to be brought together to couple it to a towing vehicle, a gate raisable to open up discharge from the paver, and a lift actuatable to lift a screed in the paver from the ground. A hydraulic motor is provided for actuating each of the above under power. Manually operated pump mechanism drawing fluid from a reservoir is actuatable to supply fluid under pressure to each of said hydraulic motors. An electrically operated or driven pump having an intake connected to...

An extendable, floating screed for an asphalt paver including screed extensions which extend, retract and pivot relative to the main screed. The screed extensions are mounted to the main screed with a zero clearance pivot joint. The disclosed pivot joint permits the screed extension to extend, retract and pivot relative to the main screed which maintaining zero clearance at the pivot. The pivot joint includes respective mounting plates on the extension screed and the main screed which are adapte...

A tow point for an asphalt paver, which allows the operator to: (1) select either a fixed or sliding tow point connection; and (2) select from among several possible locations of each, thereby adjusting the distance between the screed and transverse auger of the paver. Combination of these features in a single machine makes it possible to lay down an asphalt mat of uniformly desired thickness, while optimizing use of the aggregate batch particles.