Abstract: A head-up display includes a case main body formed with an opening part, a combiner capable of closing the opening part, a combiner drive unit including a drive device and a spring, and a projection unit. The combiner, the combiner drive unit and the projection unit are accommodated inside the case main body. The combiner drive unit is integrally provided with a second turnable shaft and a bearing turnably supporting the second turnable shaft is provided in a base part fixed to the case main body so as to be turnable with respect to the base part. A first spring for urging the bearing with respect to the base part in one direction is provided between the base part and the bearing. A second spring for urging the combiner drive unit with respect to the bearing in an opposite direction is provided between the bearing and the combiner drive unit.

Abstract: A head-up display includes a case main body formed with an opening part, a combiner capable of closing the opening part, a combiner drive unit including a drive device and a spring, and a projection unit. The combiner, the combiner drive unit and the projection unit are accommodated inside the case main body. The combiner drive unit is integrally provided with a second turnable shaft and a bearing turnably supporting the second turnable shaft is provided in a base part fixed to the case main body so as to be turnable with respect to the base part. A first spring for urging the bearing with respect to the base part in one direction is provided between the base part and the bearing. A second spring for urging the combiner drive unit with respect to the bearing in an opposite direction is provided between the bearing and the combiner drive unit.

Abstract: A concrete curing and texturing machine includes a truss frame supporting a reservoir of curing fluid and drive members positioned at the ends of the truss frame for powering the machine longitudinally along a roadway being surfaced. A texturing carriage is mounted to the truss frame and arranged to longitudinally move back and forth along the truss frame. A truss member is mounted rearwardly of the truss frame and includes a sprayboom carriage unit which moves longitudinally move back and forth along the truss member. The sprayboom carriage unit supports a sprayboom having a plurality of nozzles operatively connected to the liquid reservoir.

Abstract: A drum mixer for heating, mixing and drying an aggregate material, such as a mixture of recycled asphaltic pavement and virgin aggregate. The drum mixer includes an inclined drum having a first end and a second end. The drum forms a pre-heating/blending section adjacent the first end, a heating/mixing section adjacent the second end, and a heating/drying/mixing section therebetween. A feed assembly for feeding aggregate material, preferably having a high ratio of RAP material to virgin aggregate, is provided. The feed assembly feeds the aggregate material into the pre-heating/blending section of the drum for movement of the aggregate material sequentially through the pre-heating/blending section, the heating/drying/mixing section and the heating/mixing section. A burner assembly extends from the second end of the drum into the heating/drying/mixing section of the drum.

Abstract: A conveyor assembly having upper and lower truss portions includes a hinge mechanism structurally arranged to be secured to the upper truss and lower truss portions. Rotational movement of the hinge mechanism lowers the lower truss portion while simultaneously positioning the upper truss portion in a plane substantially parallel to the plane of the lower truss portion.

Abstract: A drum mixer for heating, mixing and drying an aggregate material, such as a mixture of recycled asphaltic pavement and virgin aggregate. The drum mixer includes an inclined drum having a first end and a second end. The drum forms a pre-heating/blending section adjacent the first end, a heating/mixing section adjacent the second end, and a heating/drying/mixing section therebetween. A feed assembly for feeding aggregate material, preferably having a high ratio of RAP material to virgin aggregate, is provided. The feed assembly feeds the aggregate material into the pre-heating/blending section of the drum for movement of the aggregate material sequentially through the pre-heating/blending section, the heating/drying/mixing section and the heating/mixing section. A burner assembly extends from the second end of the drum into the heating/drying/mixing section of the drum.

Abstract: A vibrator assembly is described for use with a concrete paving machine moveable longitudinally along a body of poured concrete. The paving machine includes a machine frame and a finishing carriage unit moveable transversely back and forth across the body of concrete. A plurality of support members are mounted to the paving machine frame and include extension members structurally arranged to move between a collapsed position and an extended position. A vibrator truss support frame member is mounted to the extension members and a ganged vibrator carriage assembly is mounted to the vibrator truss support frame member and structurally arranged to move transversely back and forth across and through the body of concrete.

Abstract: An anti-clogging or anti-bridging mechanism is disclosed which is structurally arranged to engage the nozzle ports in a cutting housing to seal the ports from pulverized road bed material. The mechanism further includes cable members which facilitate movement of the pulverized material through the cutting housing.

Abstract: The present invention is a decontamination plant for removing contaminates from contaminated material. The decontamination plant comprises an outer shell including a cavity therein. A drum formed of heat conductive material is rotatably mounted in the cavity defined by the outer shell so as to form an annular heating chamber between the drum and the outer shell. A plurality of heat sources are positioned to discharge heat into the annular heating chamber. The drum also has an inner surface defining a decontamination chamber. A tube is concentrically supported within the decontamination chamber formed in the drum. The tube has an inlet which is in communication with the annular heating chamber so as to receive flue gases therefrom. The outlet of the tube is positioned to exhaust gases from the drum. The drum is slightly inclined from a material receiving opening to a soil discharge end so as to cause the material which is being decontaminated to progress through the decontamination chamber as the drum rotates.

Abstract: A materials grinder includes a rotary grinding drum and a shear bar cooperating with the grinding drum to grind various types of materials. The shear bar is mounted on a pivotal structure adjacent the materials grinding drum. A displaceable biasing member biases the pivotal structure toward the grinding drum to maintain the shear bars in close cooperating relationship therewith. If ungrindable materials are encountered, the pivotal structure pivots away from the grinding drum against the bias force of the biasing member to permit the ungrindable materials to pass between the grinding drum and the shear bar. Once the ungrindable materials pass, the biasing member moves the pivotal structure back toward the grinding drum. Materials to be ground are fed to the grinding drum by means of an infeed conveyor and an overhead infeed roller.

Abstract: The invention relates to a method and equipment for producing foam bitumen. Water is mixed to hot bitumen under a pressure which is lower than the prevailing absolute pressure, and after this the pressure is allowed to rise and the flow rate to drop. The mixing of water and bitumen occurs in a foaming reactor (17), which is connected via a pipeline (6, 8, 9, 10) to a spray bar (1), which also acts as a heat exchanger, and the changes in the flow caused by an inclination in the spray bar are compensated by means of pipes (6) and valves (7). The entire equipment is thermally insulated, and a part of it may be provided with electric heating to prevent the bitumen from solidifying. It is possible to circulate hot bitumen in the equipment by opening a valve (12), whereby the entire equipment is brought to an operating temperature.

Abstract: A concrete finishing machine includes a surfacing unit having two finishing cylinders and two augers mounted in line with the two cylinders, a pair of compacting rollers located on either side of the augers and suspended by a frame which is attached to the surfacing unit by a mounting assembly which allows adjustment in the vertical height of the compacting rollers relative to the surfacing unit for setting the compacting rollers relative to the surface being finished. The frame is adapted to be vibrated for vibrating the compacting rollers in use. The compacting rollers each have an outer peripheral planar surface extending about the periphery of the roller and a plurality of recessed planar surfaces spaced equally about the periphery of the roller.

Abstract: The invention relates to a method and equipment for producing foam bitumen. Water is mixed to hot bitumen under a pressure which is lower than the prevailing absolute pressure, and after this the pressure is allowed to rise and the flow rate to drop.

Abstract: A paving machine having a sensor-controlled concrete metering screed. The machine includes hydraulic cylinders which move the metering screed to various elevations to control the depth of concrete being metered out by the screed. At least one ultrasonic sensor is slide-mounted to the machine above and behind the metering screed to provide measurements of the distance between the sensor and the surface of the concrete just behind the screed. A control system compares the sensor measurements with a tolerance range of distances corresponding to the desired depth of concrete. When the sensor measurements are out of tolerance, the control system moves the metering screed up or down to bring the distance, and the metered depth of concrete, back within tolerance.

Abstract: A concrete vibrator apparatus is described for use in conjunction with a concrete finishing machine that is movable longitudinally along a roadway. The finishing machine includes a finishing unit engageable with the surface of the concrete and movable transversely across the roadway, a supporting frame mounted to and extending forwardly and outwardly from the movable finishing unit, and a vibrator assembly mounted to the supporting frame. The vibrator assembly includes first and second vibrator units, with each of the vibrator units being independently movable between a downwardly position wherein the vibrator unit extends into and below the surface of the concrete and an upwardly position wherein the vibrator unit is out of contact with the surface of the roadway. A control mechanism is described for controlling the selective movement of the vibrator units and the rate of vibration of the vibrator units.

Abstract: A system for remediating soil containing contaminants. The system comprises a rotary volatilizer, a thermal dust conductor, a soil cooler, a separator and an afterburner. The rotary volatilizer includes a rotatable, counterflow volatilizer drum with a drying zone, a heating zone and a burn zone. The burn zone of the volatilizer has an outer shell and a stainless steel inner liner supported by spring brackets within the outer shell. A separator is provided to receive exhaust gases from the volatilizer and the soil cooler and to remove dust from the exhaust gases. Dust from the separator and hot soil from the volatilizer is introduced into the thermal dust conductor. Hot gases from the thermal dust conductor are returned to the volatilizer to preheat combustion air for the volatilizer and to incinerate contaminants in the returned gases. Soil is transferred from the thermal dust conductor to the soil cooler, where water injection cools the remediated soil and adds moisture to the soil.

Abstract: A paving machine having a medially located dowel bar feeder positioned in front of a dowel bar inserter. The machine has a screw or paddle for spreading the concrete and a front strike-off to allocate a proper amount of unconsolidated concrete beneath the machine. Next in line, internal vibrators are mounted to the machine to perform a preliminary consolidation of the concrete, followed by a screed to meter out a correct volume of consolidated concrete for a finished concrete slab. To the rear of the screed, the dowel bar feeder drops dowel bars in a predetermined pattern on the top surface of the consolidated concrete. The dowel bar inserted is mounted to the paving machine behind the dowel bar feeder and includes a plurality of vibrating forks which descend to engage the dropped dowel bars and insert the dowels into the unhardened concrete. In operation, the dowel bars are dropped and the paving machine is driven forward until the forks are over the dropped dowel bars.

Abstract: A pan drag device is disclosed for attachment to a concrete finishing machine movable longitudinally along an elongated body of poured concrete, with the finishing machine having a finishing unit engageable with the surface of the poured concrete and movable transversely across the body of concrete to grade the concrete. The pan drag device includes support members mounted to and extending rearwardly from the finishing unit and movable with the finishing unit and pan drag apparatus mounted to the support members for engaging the graded concrete surface to finish and seal the concrete surface.

Abstract: A closed, pressurized apparatus for introducing aggregate dust and rubber into a stream of liquid asphalt is provided. Aggregate dust and rubber are dispensed through a valve from a receiving chamber into a mixing housing. The aggregate dust and rubber enter the mixing housing at an intermediate location therein. The liquid asphalt is introduced into the mixing housing through a separate conduit at a location thereon above the point of entry of the aggregate dust and rubber. The liquid asphalt, the aggregate and the rubber combine within the mixing housing to form a slurry composition. A heating jacket substantially surrounds the mixing housing and a system for preventing liquid asphalt from backing up into the receiving chamber is also provided. The apparatus is particularly useful in an asphalt plant using a bag house.

Abstract: A mixer having an elongated housing with an upper wall, a curved lower wall, an inlet end and a discharge end. A rotatable shaft within the housing extends from the inlet end to the discharge end of the housing. A plurality of blades are attached to the shaft in a discontinuous helical pattern. An injection tube is located at the inlet end of the housing to spray bituminous liquid into the housing. Recycle aggregate and bituminous liquid are introduced into the inlet end of the housing. Asphalt mix is removed from the discharge end of the housing. Each blade has a curved outer end which is in near contact with the lower wall of the housing as each blade moves through a lower part of its rotation. The upper wall of the housing is spaced a distance from the blades to define an open slinging area between the blades and the housing. The blades both mix and move material from the inlet end to the discharge end of the housing.