Abstract: There is disclosed a rock crushing apparatus having a frame, an anvil mounted therein and a mounting for a rotor. The rotor has hammer elements disposed thereon for cooperation with the anvil. The rotor includes an outside surface, a plurality of recesses in spaced relation about the outside surface and a plurality of rotor protection members for protecting the rotor. The rotor protection members are releasably mounted in the recesses and extend outwardly of the outside surface of the rotor means for preventing wear of the outside surface. The hammer elements are releasably mounted in the recesses and in alternation with the rotor protection elements and extend outwardly of the rotor protection members. The hammer elements lift and pulverize the rock material. This arrangement has been found to be more effective than any of the prior art arrangements due to the configuration of the hammer elements and their disposition on the rotor.

Abstract: A paving machine employs a screed heating system using heat from the exhaust system to heat indirectly the screed to the desired temperature. A heat exchange medium is heated by the exhaust system in a first heat exchanger and is then conveyed to a second heat exchanger where it heats the screed. Measures are taken to supply additional heat to the heat exchange medium as may be required to achieve the required heat transfer in the second heat exchanger. The system operates under low pressure and is thus simpler, less expensive, and less likely to fail than high-pressure systems. Preferably, the heat exchange medium is continuously circulated between the first and second heat exchangers in a closed-loop to minimize the amount of heat exchange medium required and to simplify the system. The system is also preferably designed to permit movement of the screed relative to the remainder of the paving machine and to permit flexing of the screed.

Abstract: A highway system for vehicular traffic which includes an intersection between a main road and a secondary road, each having two traffic directions separated by a center line. The main road has a barrier along its main section for preventing direct crossing by traffic from the second road, and bypasses for each traffic direction. It further has barriers for directing traffic into the bypasses. A further barrier defines a return stretch of the bypass, the return stretch not having a barrier and being such as to permit merging of the two opposite directions of the main road traffic.

Abstract: The present invention relates to a ramp system. The ramp system includes a riser component that includes a first side and a second side that meets the first side. The second side and first side form an angle that is less than 90.degree.. The ramp system also includes an adjuster component positionable within the riser component. The adjuster component lifts one end of the first side so that an angle that the second side makes with the horizontal is increased when compared to an angle made between the second side and the horizontal without the adjuster component.

Abstract: A removable and collapsible barricade post assembly for the restriction of vehicular traffic. The barricade post assembly has a novel base assembly that allow the post assembly to be removed from its mounting bracket which is normally permanently affixed to the ground. Alternatively, the post assembly can remain attached to its mounting bracket while being lowered to allow the passage of vehicular traffic. The barricade post assembly has a number of security features to restrict the unauthorized removal or collapsing of the barricade post. A cover assembly to enhance security and to provide weather protection for the barricade post assembly is also described.

Abstract: A roadway paving apparatus applies successive layers of paving material to a roadway surface so as to form a desired thickness of pavement thereon. Preferably, the apparatus comprises a hopper for hauling aggregate material (e.g., gravel, sand, and/or crushed stone) and for dispensing a curtain of falling aggregate material therefrom. An initial group of spray nozzles aimed generally at the surface of the roadway applies a base layer of adhesive material (e.g., liquid asphalt) to the surface of the roadway. One or more groups of subsequent spray nozzles aimed generally at the curtain of falling aggregate material coats the curtain of falling aggregate material with adhesive material such that an intermediate layer of adhesive coated aggregate material is deposited on top of the underlying base layer of adhesive material. A final group of spray nozzles aimed at the surface of the roadway applies an overspray layer of adhesive material on top of the intermediate layer of adhesive coated aggregate material.

Abstract: A flexible, raised snowplowable pavement marker having a top portion that readily deforms downwardly into a base portion when impacted by vehicular traffic or a snowplow blade. Markers installed in a cavity bored in pavement are anchored in place with grouts or alternatively within an annular ring mounting device. The marker body may be black in color to take advantage of solar activity in improving marker performance and longevity and may be vented to atmosphere to facilitate the downward deflection of the top portion of the pavement marker. A retroreflective sheeting is affixed to the marker so that the marker is highly visible to motor vehicle drivers at nighttime.

Abstract: A command device for a paint supply circuit in a road marking machine (1) includes at least one paint spray gun (2) mounted on a support chassis (11) that can be moved on a roadway (10) along a line to be marked and linked to a paint supply circuit (3) provided with a triggering unit (21) for the application of the paint.

Abstract: A process and a machine for forming a bonding layer for bonding a bituminous coated material layer on a support. The process includes application of a surface-active agent on the support, application of a bituminous emulsion on the surface-active agent on the support, and application of a breaking agent on the bituminous emulsion to form the bonding layer. A road-type coating made by the process and, therefore, including such a support layer, a bonding layer on the support, and a bituminous coated materials layer on the bonding layer. To perform the process, a machine includes a frame, a displacement mechanism on the frame, a bituminous-emulsion spreader on the frame, a surface-active agent applicator on the frame, and a breaking agent applicator on the frame.

Abstract: A reinforcing structure for a hinge section of a Gerber bridge including first and second girders (10, 11) which are connected with each other through the hinge section, comprises reinforcing steels (13a, 14a) continuously established on at least one of upper and lower surfaces of the first and second girders (10, 11) and reinforcement (13, 14) established by covering at least one of the upper and lower surfaces of the first and second girders on which the reinforcing steels are established, with curing material so as to integrally connect the first and second girders (10, 11) with each other. By making the hinge section to be continuous between the first and second girders to thereby establish the Gerber bridge as a continuous bridge, the Gerber bridge can have the same structure as a continuous bridge which transfers bending moment therethrough, and thus can obtain superior reinforcement effects and long-term stability.

Abstract: A method and apparatus for deflating a tire of a vehicle, the apparatus including a housing having at least one channel member and at least one opening provided in the housing, and at least one deflator connected to the housing, an actuating cam slidably housed in the channel member and being removable from a first position to a second position, the cam engaging the at least one deflator when in the first position and respectively moving the at least one deflator into the at least one opening upon sliding of the cam from the first position to the second position so as to be engagable with a tire of a vehicle and a mechanism for sliding the cam in the channel member.

Abstract: A traffic collar cone has a delineator having a reflection sheet attached on its upper part. A plug is placed under the sheet having an air inlet and outlet extending upwardly and downwardly therethrough. A conical body member is provided, having in its upper end wall an insertion hole in which the plug is mounted. A support panel is provided at the bottom of the body and cone collars are attached on the outer surface of the body member, with vertical spacing between them. The traffic collar cone is made of flexible material and designed to recover its original shape after being impacted, so that injury to collar cone is eliminated or minimized. The support panel can be adhered onto a roadway.

Abstract: A glue dispenser is mountable on a vehicle as part of apparatus for installing raised road markers on a roadway. Preferably, the apparatus is used in a system for automated installation of road markers. The dispenser includes a manifold having an inlet for glue fed downwardly into the manifold from a glue reservoir mounted on the vehicle. First and second glue outlets communicate with the inlet. First and second valves control opening and closing of the first and second outlets, respectively. The valves are operable both simultaneously and independently of each other to permit glue to be dispensed from only of the outlets or from both of the outlets simultaneously, as needed. The outlets are spaced apart a distance equal to a desired distance between lines of markers in a double line installation.

Abstract: An expansion joint system which is designed to accommodate forces applied to highway construction during normal changes in ambient conditions, and which is also designed to withstand seismic forces which may be applied in transverse and longitudinal directions. The system comprises spaced-apart transverse beams which are placed in a gap defined between adjacent sections of highway construction such as in a bridge. Longitudinally extending support bars are positioned beneath the beams, and the ends of the bars are located in the interiors of boxes associated with the highway sections. One set of boxes confines bar ends against transverse movement but permits longitudinal movement. The other set of boxes permits the transverse movement but limits longitudinal movement.

Abstract: A resilient expansion joint insert member for insertion into the expansion joint between adjacent concrete floor slabs. As the concrete slabs move further apart due to settling or thermal contraction, insert member covers the widened gap. Likewise, as the concrete slabs move closer together due to settling or thermal expansion, the insert member is compressed and absorbs the force as the slabs move against each other. The flooring material on the slabs near the expansion joint move beneath a cap of the insert member.

Abstract: Vehicle arresting beds, for installation at the ends of aircraft runways, are effective to safely decelerate aircraft entering the bed. The arresting bed is assembled of a large number of blocks of cellular concrete having predetermined compressive gradient strength, so that aircraft landing gear is subjected to drag forces effective to slow a variety of types of aircraft, while providing deceleration within a safe range of values. An arresting bed typically includes an entry region of a depth increasing from 9 to 24 inches formed of blocks having a first compressive gradient strength. A second region, which may be tapered into the first region and increase in depth to 30 inches, is formed of blocks having a greater compressive gradient strength. An aircraft thus experiences increasing drag forces while it travels through the bed, to provide an arresting capability suitable for a variety of aircraft.

Abstract: An adjustable bumper system for use at a loading dock which has a dock leveler having a deck pivotally mounted to a portion of the dock. The dock leveler has a lip pivotally attached to one end of said deck. The bumper system has a pair of support members each mounted to a portion of the dock. The support members may be pivotally mounted and extend along sides of the deck of said dock leveler. The support members may also be mounted to the dock face and move vertically. Dock bumpers are mounted to each support member and are positionable between two different vertical positions as the support member is moved. The dock bumpers project outward from the dock beyond the pendent lip and are adjustable to engage the rear of vehicles having different heights.

Abstract: In a slip-form paver for road constructions of concrete, at least one transverse distribution means, at least one stripper device, one slip form and at least one concrete paving screed are arranged on a support frame, said concrete paving screed being a high-compaction paving screed which is floatingly hinged by means of at least two extension bars, which are located approximately in parallel with the base course, to pulling points of the support frame which are positioned in the traveling direction at a distance in front of the high-compaction paving screed.

Abstract: The present invention relates to markers manufactured from skis. In accordance with the invention, the structure of a ski is modified to enable its use as an object which may be driven into soil or snow to designate the presence of underground objects, to delineate or identify a border or as a post for signage or fencing. The process of the invention relates to the modification of a ski by treating or removing the existing outer surfaces of a ski and providing new outer surfaces to the ski which may include graphics or notices specific to its new use. In order to inhibit the removal of a marker from soil or snow after placement, the marker may be provided with a barb system on its underground portion.

Abstract: A vibratory concrete screed including alternating turnbuckles and tubular housings, mated together for adjusting tension and screeding surface camber. The turnbuckles and tubular housings include interior space therethrough which houses an elongate rotatable shaft for providing vibration. The elongate shaft includes eccentric weights rotating within bearings within the turnbuckles and driven by drive shafts driven in turn by a motor located at one end of the screed. The screed includes male and female joiner pieces having mating bearing surfaces for securing abutting screed sections. The invention also includes a laser alignment system for adjusting camber.