Abstract: A construction-vehicle autonomous travel control device to correct a steering angle so as to direct to a target point set on a target track includes: an expected arrival point calculator to calculate an expected arrival point of a vehicle to arrive after a predetermined time based on a vehicle speed and a steering angle; and a corrected steering angle calculator to calculate a corrected steering angle so as to direct the expected arrival point to the target point.

Abstract: A construction-vehicle autonomous travel control device to correct a steering angle so as to direct to a target point set on a target track includes: an expected arrival point calculator to calculate an expected arrival point of a vehicle to arrive after a predetermined time based on a vehicle speed and a steering angle; and a corrected steering angle calculator to calculate a corrected steering angle so as to direct the expected arrival point to the target point.

Abstract: The present invention is directed to an automated system for applying coatings to big structures, such as bridges. The automated system comprises a robot coupled to a railing and the railing in turn operably coupled to a mobile platform. At least one nozzle is configured in the robot which is connected to a proportioner via a hose. A computing unit controls the robot and the proportioner for applying desired coating patterns.

Abstract: A paving assembly includes a transporter with a material feed to arrange a layer of paving material at a first distance from the transporter, a first material hopper in connection with the material feed to receive a paving material, and a superstructure selectively arrangeable on or over the transporter. The superstructure includes a frame, a further material feed extending beyond the transporter to convey the paving material at a second distance from said transporter, and a second material hopper. The superstructure includes the first and the second material hopper each arranged substantially central relative to the width of the transporter and accessible during use to allow them to be filled with paving material by a feeder for a continuous paving operation. The further material feed is arranged substantially central relative to the width of the transporter and extending over the transporter. A method of providing such a paving assembly.

Abstract: A control device for controlling a vibrating roller that generates vibration on a front wheel and a rear wheel, includes a front wheel vibration start signal output unit that outputs a front wheel vibration start signal for starting vibration of the front wheel so as to give vibration at a predetermined number of times to a road surface to be constructed per unit length, a calculation unit that calculates the rear wheel vibration start timing based on a time width required from the start of vibration of the rear wheel to the vibration at a frequency that can give vibration to the road surface to be constructed a predetermined number of times, and a rear wheel vibration start signal output unit which outputs a rear wheel vibration start signal which starts the vibration of the rear wheel at the rear wheel vibration start timing.

Abstract: A road finisher includes an undercarriage, a chassis which is adjustable in height relative to the undercarriage, an electronic control system, and a paving screed which is attached to tie bars, the tie bars each being hinged to the chassis at a pull point and the pull points each being adjustable relative to the chassis by means of a leveling cylinder. The control system comprises a receiving unit configured to detect an actual pull point height, an evaluation unit configured to calculate a deviation of the actual pull point height from a target pull point height caused by a height adjustment of the chassis relative to the undercarriage, and a command unit, which is configured to automatically at least partially correct the deviation by a correction signal sent from the command unit causing a hydraulic controller to adjust at least one of the leveling cylinders.

Abstract: A control system for controlling operation of a vibratory system and a tamper system of a paving machine includes a first input device, a second input device, and a controller. The first input device is operable to provide a first speed signal for operating the vibratory system at a desired first rotational speed. The second input device is operable to provide a second speed signal for operating the tamper system at a desired second rotational speed. The controller receives the first speed signal and the second speed signal from corresponding ones of the first and second input devices and compares the desired first rotational speed and the desired second rotational speed. Based on the comparison, the controller determines if the desired first and second rotational speeds lie within a pre-defined range from each other. Based on the determination, the controller modulates at least one of the first and second speed signals.

Abstract: The present disclosure provides various advancements for mobile and automated processing utilizing additive manufacturing. The present disclosure includes methods for the utilization of mobile and automated processing apparatus and may include examples of sealcoating operations. In some examples, omnidirectional drive systems such as Mecanum wheels may create novel operational aspects. Artificial intelligence techniques may enhance operations and may be used to create model for the processing apparatus.

Abstract: A machine for resurface existing roads. The machine may include a first group of sprayers configured to form a first layer of binding material, and a fiber material distribution component positioned adjacent the first group of sprayers. The fiber material distribution component may be configured to distribute fiber material onto the first layer of the binding material. The machine may also include a second group of sprayers positioned adjacent the fiber material distribution component. The second group of sprayers may be configured to form a second layer of the binding material over the distributed fiber material. Additionally, the machine may include a channel positioned adjacent the second group of sprayers. The channel may be configured to supply an asphalt mixture over the second layer of the binding material. Further, the machine may include a screed positioned adjacent the conduit. The screed may be positioned to contact the asphalt mixture.

Abstract: A vehicle system for automatic repairing of road potholes includes: a laser camera that measures distance from a vehicle to the pothole and calculates surface area based on the image and distance information, a first support shaft that moves back and forth, a multi operation device that cuts and crushes asphalt and flattens asphalt concrete, a heating device that melts asphalt, an asphalt vacuum suction device that sucks in asphalt and stores fragments in a residue storage tank, an asphalt concrete storage tank that stores asphalt concrete and supplies asphalt concrete around the road pothole, a residue storage tank that stores crushed asphalt sucked in, an oil supply nozzle that supplies oil, an air supply pump that supplies strong air for cleaning, and a vehicle device that operates power switch, cutting device motor, asphalt vacuum suction device, air supply pump, asphalt concrete volume calculation part, and roller part.

Abstract: A drive system for aligning a detection zone of a cartridge with an image capture device is provided. The drive system can include a first motor configured for the purpose of spinning the cartridge to drive centrifugal flow of a liquid in the cartridge. The drive system can further include a second motor coupled to a cartridge-aligning member, configured for the purpose of aligning the detection zone with the image capture device. Advantageously, each motor can be adapted for its specific purpose.

Abstract: A drive system for aligning a detection zone of a cartridge with an image capture device is provided. The drive system can include a first motor configured for the purpose of spinning the cartridge to drive centrifugal flow of a liquid in the cartridge. The drive system can further include a second motor coupled to a cartridge-aligned member, configured for the purpose of aligning the detection zone with the image capture device. Advantageously, each motor can be adapted for its specific purpose.

Abstract: Method for laying down a pavement consisting of paving material with a road paver screed in which a compaction unit pre-compacts the paving material at cyclical work cycles with a selectable stroke and at a selectable frequency while the pavement is laid down at a selectable paving speed and at least the stroke is automatically adjustable in response to paving parameters.

Abstract: An attachment is pivotally connected to a compact loader and operable to level uncured concrete. A base of the attachment is removably securable to the loader and a horizontal roller support is pivotally connected to the base on a first side thereof and pivotal about a vertical pivot axis. A screed roller is suspended from the roller support and driven by a drive motor which may be mounted in the tube forming the roller. The roller support and attached screed roller pivot between a stowed position extending along a side of the loader, generally parallel to the direction of travel, and an extended position in which the roller support and screed roller extend up to approximately ninety degrees to the side of the loader. Pivot bearings are preferably included on both sides of the base so that the roller support may be pivotally mounted on either side.

Abstract: In a method for laying down a pavement consisting of paving material with a screed of a road paver, in which a compaction unit, particularly a tamper, pre-compacts the paving material at cyclical work cycles with selectable stroke and selectable frequency while the pavement having a selectable pavement thickness) is in the process of being laid down at a selectable paving speed, at least the stroke is automatically adjustable in response to paving parameters, such as at least the paving speed and/or the pavement thickness, along a characteristic curve or in a characteristic map. In the screed the compaction unit comprises an adjusting mechanism which is operable during the ongoing paving work for adjusting the stroke of the compaction unit.

Abstract: The present invention relates to a hand-guided ground compacting machine, such as, in particular, a vibration tamper, a vibratory roller or a vibratory plate, comprising a driving engine mounted on a machine frame, a ground compaction device driven by the driving engine, and a guide bar. Features of the present invention reside in that the driving engine is a liquid gas powered driving engine and that the ground compacting machine comprises at least one storage container for liquid gas which is replaceably disposed in a storage container holding means on the hand-guided ground compacting machine.

Abstract: The apparatus and method comprise a concrete float with a vibratory additive broadcaster assembly attached therewith. The broadcaster assembly is suspended above the plane of the finishing tool with a vibratory source attached. The broadcaster assembly is filled with an additive and the apparatus is placed on a wet, concrete surface that is to be treated and finished, by a user. Actuation of a power switch by the user activates the vibratory source resulting in the substantial broadcast of additive on to the concrete surface at the desired location(s) on the slab as determined by the user. Vibration damper devices are utilized to minimize the vibrations experienced by the float. The additive is integrated into the concrete or other wet surface by passage of the float over the surface being treated.

Abstract: The apparatus and method comprise a concrete float with a vibratory additive broadcaster assembly attached therewith. The broadcaster assembly is suspended above the plane of the finishing tool with a vibratory source attached. The broadcaster assembly is filled with an additive and the apparatus is placed on a wet, concrete surface which is to be treated and finished, by a user. Actuation of a power switch by the user activates the vibratory source resulting in the substantial broadcast of additive on to the concrete surface at the desired location(s) on the slab as determined by the user. The additive is then integrated into the concrete by passage of the float over the treated concrete surface.

Abstract: The present invention relates to various aspects of system and a method for forming a pavement. In one of many aspects, a portable paving mix container containing a paving mix for forming pavement is provided. The portable paving mix container is loaded onto a paving machine. The paving mix from the portable paving mix container is unloaded into a mix unloading section of the paving machine, which distributes and compacts the paving mix on a paving surface. After the unloading of the paving mix, the portable paving mix container is off loaded from the paving machine.

Abstract: A tamper bar mechanism includes a drive shaft with an eccentric section on the shaft. A tamper drive member is driven by the eccentric section and drives a tamper bar between an upper position and a lower position to define a tamper stroke length. A stroke adjustment link is operatively connected to the tamper drive member and a stroke adjustment mechanism is operatively connected to the stroke adjustment link to adjust an angular orientation of the stroke adjustment link relative to the path of travel of the tamper bar and adjust a length of the tamper stroke length. A paving machine and a method of adjusting the tamper stroke length are also provided.

Abstract: In a system for laying down an asphalt layer made of asphalt material, and having a road paver having a screed with compacting tools, a compacting device and a mixer, an electronic material density module is provided in or for the road paver. The electronic material density module obtains data during the laying process regarding at least the actual degree of compaction of the asphalt layer produced in the area of at least one compacting tool and evaluates and/or documents these data at least for operational optimisation and/or operational monitoring of the road paver and/or compacting device and/or mixer. The data obtained is communicated to the compacting device that produces the final degree of compaction of the asphalt layer based on the data and on the actual degree of compaction determined at the screed.

Abstract: A pothole patching machine includes a container for storage of patch material, and a auger screw conveyor for conveying the patch material from the container to a ram. The ram is adapted to forcibly urge the patch material into a pothole. The ram is moveable between a retracted position and an extended position which completes one fill stroke. The ram also includes a foot plate dimensioned for positioning over the pothole and sensors for sensing when the pothole has been filled.

Abstract: A paving machine which is configured to move in a paving direction for spreading, leveling and finishing concrete into a form having a generally upwardly exposed, finished concrete surface and terminating in lateral concrete sides. The paving machine has a main frame, including a center module, bolsters laterally movably connected to respective lateral sides of the center module for changing a spacing between the bolsters, 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 secured to the swing leg proximate a free end thereof. A worm gear drive between the jacking column and the crawler track permits rotational movements of the crawler track and the jacking column about an upright axis.

Abstract: A method of laying a finishing layer with a road finisher F having a screed B, whereby the screed, equipped with a tamper device T and a smoothing plate, at least compacts and superficially smoothes the finishing layer, and the stroke and/or the frequency of the tamper device T are remotely varied for laying a finishing layer with a paving thickness and/or laying rate V which vary over the pave width and transversely to the working direction R within the pave width. A road finisher having a screed suitable for implementing the method set forth above wherein the road finisher or screed has an adjustment device for the remotely actuated local variation of at least the stroke of the tamper device within the pave width.

Abstract: A method for controlling the process laying a layer in a selectable paving thickness with a road finisher in which the laying process is automatically controlled in that a target value for the paving thickness is entered into an automatic closed-loop control system and communicates the actuating signals to such members and the signals. A road finisher has a computerized, either fully automatic or operator aided closed-loop control system for the direct control of the laying process with control of the paving thickness to a predetermined target value and for the optimization of the operating point of the pre-compaction system, which is connected to sensors at least for the acquisition of the setting angle of the screed, of the paving thickness and of the laying rate.

Abstract: A vibratory plate compactor with aggregate feed system includes a frame, a soil compacting plate and a drive mechanism, such as a hydraulic motor, is mounted on the frame and has a rotatable drive shaft which uses a V-belt to drive a vibratory actuator on the tamping plate. The frame also carries a hopper that uses a screw conveyor to force the stored aggregate into a vertical conduit. A tamping piston forces aggregate out of the vertical conduit, through apertures in the compactor plate and compacts the loose soil with a multitude of blows, the vibratory plate is then actuated to further compact the aggregate. The process is repeated until the cavity is filled and compacted to the required density. The vibratory plate compactor with aggregate feed system is ideally suited to filling and compacting aggregate in used automobile tires that are used in the formation of a tire wall.

Abstract: According to the present invention, a variable compression ratio engine having crankshaft main bearings mounted in one or more eccentrics includes a power take-off coupling having a single link or linkage. In the preferred embodiment of the present invention a drive arm is integrated into the crankshaft and a driven arm is integrated into the torque converter or clutch housing. The power take-off coupling further has a linkage having a first linkage end and a second linkage end. The first linkage end is pivotally connected to the drive arm and the second linkage end is pivotally connected to the driven arm for transferring torque from the crankshaft to the torque converter or clutch housing. According to the preferred embodiment of the present invention, the power take-off coupling has only one link. The link, drive arm and driven arm are all rigid components made out of steel or other suitably stiff and strong metal. The single link is exceptionally robust, reliable and simple.

Abstract: The invention relates to a vibrating plate for ground compaction, said plate comprising a remote control device for controlling at least one forward or rear journey by the excitation of an oscillation device. The remote control device comprises an emitter unit, which can be displaced independently of the remaining vibrating plate and which can be detachably fixed to a draw bar. In a remote control mode, the emitter unit is held by the user and displaced independently of the vibration plate. In a draw bar mode, the emitter unit is placed on one end of the draw bar, so that the user can guide the vibrating plate by the pulling and pushing of robust control handles on the emitter unit. The latter can have at least one control handle, which can be used not only to input control commands for controlling the oscillation device, but can also be held by the user to manually guide the vibrating plate.

Abstract: In one aspect of the present invention, a paved surface reconditioning system has a vehicle adapted to traverse a paved surface. The vehicle having a press plate with a working surface having plurality of nozzles disposed therein. At least one of the nozzles has an inner diameter less than 1 mm. A fluid passage may connect the nozzle to a reservoir. The reservoir and fluid passage have a volume and a pressurizing mechanism in communication with the volume and being adapted to pressurize at least a portion of the volume.

Abstract: An apparatus for regulating a flow of pavement rejuvenation materials for deposit on a roadway is disclosed in one aspect of the invention as including a first channel is supported by a pavement recycling machine and is in communication with a supply of pavement rejuvenation materials; a second channel slideably coupled to the first channel, the pavement rejuvenation materials adapted to flow through the first and second channels; and a hardened tip coupled to the second channel. The apparatus may also have a seat coupled to one of the channels; and a blocking element coupled to the other of the channels. Upon sliding the first channel with respect to the second channel, the blocking element contacts the seat, thereby impeding the flow of pavement rejuvenation materials flowing through the channels.

Abstract: The invention relates to a vibratory paving screed for a paver, comprising a baseplate and a vibration drive therefor and also comprising a front wall which is mounted upstream of the baseplate in the paving direction, is fixed with respect to the baseplate and engages with the baseplate, in which arrangement the baseplate comprises a section of uniform thickness and, in the region of its front edge, a separate, solid strip which is connected to the section and has a metering slope and a flat run-in bevel situated behind.

Abstract: A vibration plate with a top mass and a bottom mass has, in addition to a spring device, a stabilizing device with which the bottom mass can be guided during its movement relative to the top mass. The stabilizing device has a transverse stabilizer which prevents tilting between the top mass and the bottom mass. The stabilizing device may likewise be formed by one or more Panhard rods, which prevent a transverse displacement between the top mass and the bottom mass.

Abstract: In combination with a placers/spreader having a frame including at least two side bolsters standing parallel to the subgrade path and at least two cross beams spanning the subgrade path forming a conveyor supporting structure. A rail system is attached spanning the frame, and has a roll in/roll out conveyor with a cantilevered support at one of the side bolsters and a support for attachment to and support from the rail system. The conveyor moves in traversing motion across the frame to distribute concrete. The improvement comprises a strike off beam and spreader plow assembly for trailing attachment to the frame of a placer/spreader. We thus disclose a strike off beam with spreader plow assembly which can be removably attached to either side of a placer/spreader to avoid the necessity of relocating the receiving conveyor when the location of the access road changes from one side to the other or direction of spreading changes.

Abstract: At least two paving screeds B1, B2 which are distant in operation running direction R are supported at a chassis 1 of a paver F. The paver F is designed for simultaneously casting several paving material layers L1, L2 on top of each other on a plane P. Each paving screed B1, B2 is provided with a compaction assembly. One paving screed B1 for casting a lower layer L1 is provided at a front end section of the chassis 1 and has the compaction assembly 13, 14 for generating a degree of compaction in the lower layer L1 which suffices to withstand the direct contact of the undercarriage 2. At least one further paving screed B2 for casting an upper layer L2 is arranged behind the undercarriage 2. According to the method to be carried out with the paver F the lower layer which is cast and compacted in front of the undercarriage allows to run the undercarriage 2 on the lower layer while the upper layer L2 is cast and compacted behind the undercarriage 2.

Abstract: The invention relates to a method for smoothing or leveling a ground surface, wherein a smoothing or leveling material is laid on a ground surface in that a box-like device filled with material is moved forwards, the material being allowed to exit a plate-adjustable rear opening in the box-like device and to come to lie in a strip, and a blade mounted on the box-like device after the opening spreads the material on the ground surface, the blade being capable of being raised and lowered together with the plate, the blade is raised and lowered with an adjustable reduction ratio relative to the plate, by means of a lever/parallelogram arrangement which connects the blade and the plate.

Abstract: A screed assembly apparatus for loose or plastic materials such as placed and/or poured, uncured concrete previously placed on the ground or another support surface, includes a screed frame, and mounted thereon, a striker for engaging and spreading the materials and a rotatable auger for moving the material longitudinally along the screed frame. The auger provides a pair of intertwined spiral flight coils. The striker is spaced to one side of the auger and in parallel thereto. An auger mounting means and a motive power means are engaged for rotating the auger to remove excess portions of the concrete from the pour.

Abstract: A method of assembling an exciter assembly for a compaction machine includes mounting a torque transfer element and a bearing on an exciter shaft. A fixed eccentric weight is mounted on the exciter shaft. First and second free swinging eccentric weights are mounted on the exciter shaft adjacent respective ends of the fixed eccentric weight so as to be rotatable a limited amount relative to the exciter shaft. The first and second free swinging eccentric weights are restrained from substantial axial movement along the exciter shaft solely by being sandwiched the first and second free swinging eccentric weights between the respective ends of the fixed eccentric weight and operative components of the exciter assembly. All of the mounting steps are performed without the use of any mounting hardware.

Abstract: An apparatus that tamps paving material and distributes the paving material evenly across a screed plate before the paving material is leveled by the screed plate. The apparatus includes a tamper bar for compacting material, a drive connected to the tamper bar, and a biasing member. The drive intermittently forces the tamper bar downward into contact with the paving material at a desired speed and to a desired depth. The biasing member is connected to the tamper bar and biases the tamper bar upward against the drive such that the biasing member raises the tamper bar out of contact with the paving surface after the drive forces the tamper bar downward.

Abstract: This invention relates to a finishing device to lay and compact asphalt layers and a method for operating the device. The finisher according to the invention is provided with a receiving device for the temporary storage of the hot mixture. The receiving device consists of two separate receiving buckets, from each of which a mixture transport system with at least one conveyance device leads to the distribution devices, and the distribution devices are constructed as spreader screws.

Abstract: A control system for use with an asphalt paving machine receives inputs from an operator interface for inputting a desired tamping frequency or a desired tamping rate (tamps/ft) and a speed sensor that produces a signal indicative of the speed of the asphalt paver. The control system includes an automatic mode and when in automatic mode the system modifies the tamping frequency to better achieve a desired number of tamps per foot traveled irrespective of speed.

Abstract: The present invention is directed to an apparatus that tampers paving material and distributes the paving material evenly across a screed plate before the paving material is leveled by the screed plate. The apparatus includes a tamper bar for compacting material, a drive connected to the tamper bar, and a biasing member. The drive intermittently forces the tamper bar downward into contact with the paving material at a desired speed and to a desired depth. The biasing member is connected to the tamper bar and biases the tamper bar upward against the drive such that the biasing member raises the tamper bar out of contact with the paving surface after the drive forces the tamper bar downward.

Abstract: An infeed conveyor is provided with high pivot capability. High pivot capability is the capability to raise the elevation of at least one end of an infeed conveyor belt to an elevation higher than regular horizontal operation if the belt placer is operating lower than the surrounding grade. High pivot capability prevents the infeed conveyor from bottoming out on the grade of the haul road or adjacent pavement; and in some instances, high pivot capability allows use of the belt placer under conditions that belt placers without high pivot capability could not operate. Also disclosed is the ability for belt placers to be used to pave in both forward and reverse directions, whereas former belt placers could only pave in the forward direction. This is accomplished by the ability to rotate the discharge conveyor under one side of the belt placer, and changing the direction in which the belt placer travels.

Abstract: This invention relates to a finishing device to lay and compact asphalt layers and a method for operating the device. The finisher according to the invention is provided with a receiving device for the temporary storage of the hot mixture. The receiving device consists of two separate receiving buckets, from each of which a mixture transport system with at least one conveyance device leads to the distribution devices, and the distribution devices are constructed as spreader screws.

Abstract: A grading machine includes a forwardly projecting frame partially supported by a small tractor. A blade assembly on the frame disperses and strikes off aggregate for subsequent paving along a course. The blade assembly of the apparatus is indirectly supported by linear actuators in turn supported by a shoe which travels along the aggregate surface. Adjustable indicators on the flame indicate the relationship of the aggregate surface to a desired aggregate height with subsequent operation of the actuators lifting or lowering the blade assembly to raise or lower the blade assembly strike off action for return of the indicators to a predetermined relationship to guides, shown as concrete forms, extending along the course of the aggregate being laid. A vibratory compactor trails the shoe and may move about multiple axes. The shoe supported actuators may be operated in a uniform or differential manner, the latter resulting in transversely tilting the blade assembly for transverse sloping of the aggregate surface.

Abstract: Apparatus and methods are provided for filling a groove in a pavement with a groove filling grout. The present invention is particularly useful for forming long-lasting pavement markings, such as lane striping.

Abstract: A travel control device for vibrating plate compactor which can easily switch the travel direction of a large sized compactor weighing more than 500 kg by a hydraulic pump circuit having a servo valve to supply pressure from outside for switching the travel direction in order to shift the rotational phase of one of the rotors in the vibration generator. The travel control device receives the mechanical return force from the vibration generator at one end thereof in the cylindrical body and is provided at other end with a piston positioned to receive the pressure oil from an outside hydraulic pump, a push rod to operate said piston inserted into the other end of the body from outside, and a spool for servo valve at the side opposite to the side receiving said mechanical return force of said piston to supply the pressure oil from said hydraulic pump by operating said push rod.

Abstract: A soil compacting device has a damping system which couples an upper mass and a lower mass together with a spring system in a vibration system. The damping properties of the damping system can be modified while the device is in operation. Therefore, when the soil compacting device passes over soils having different properties, it can constantly be adjusted in an optimal manner to the ground underneath it by acting on the vibration properties of the overall vibration system.

Abstract: A screeding assembly and method is disclosed for spreading, grading, consolidating and smoothing loose or plastic material such as poured, uncured concrete when the assembly moved over an area of the material. The assembly includes a rotatable auger to move the material laterally across the path of travel, a vibratory screed positioned behind the auger to smooth and finish the material, and an elongated engaging member reciprocated laterally across the path at a position between the auger and vibratory screed to facilitate consolidation of the material. Preferably, a plow/striker is positioned in front of the auger to and remove excess material. The assembly may be mounted on a self-propelled vehicle or other support on a boom for moving the assembly over the material, and is preferably controlled by a laser beam responsive elevation control. A kit for attaching the reciprocating engaging member to an existing screed assembly is also provided.

Abstract: A crawler type vibratory compacting machine of the invention compacts the ground from a surface layer to a deep layer with high efficiency. The crawler type vibratory compacting machine comprises: a triangular crawler unit which includes one wide track (35) or a plurality of juxtaposed tracks (35a, 35b, 35c) wound around wheels (32, 34) arranged along the length of and above a track frame (31); and a vibrator (40) which is housed in the crawler unit. The crawler unit has opposite lateral ends of its center coupled via a first lateral shaft (23) and pins, to an arm (20) which extends from a vehicle body (10) having an operators seat (11).

Abstract: A screeding assembly and method is disclosed for spreading, grading, consolidating and smoothing loose or plastic material such as poured, uncured concrete when the assembly moved over an area of the material. The assembly includes a rotatable auger to move the material laterally across the path of travel, a vibratory screed positioned behind the auger to smooth and finish the material, and an elongated engaging member reciprocated laterally across the path at a position between the auger and vibratory screed to facilitate consolidation of the material. Preferably, a plow/striker is positioned in front of the auger to and remove excess material. The assembly may be mounted on a self-propelled vehicle or other support on a boom for moving the assembly over the material, and is preferably controlled by a laser beam responsive elevation control. A kit for attaching the reciprocating engaging member to an existing screed assembly is also provided.