Abstract: The present spreading apparatus for road construction mixtures, such as bituminous cold mixtures, has at least two V- or U-shaped screeding structures or screeds one leading and the other trailing with respect to the working direction. The leading screed extends tandemly, partially into the angle formed by the trailing screed. The leading screed structure has a worm type conveyor connected parallel to each wall of the V- or U-shaped screed. The worm type conveyor assures the homogenity of the road construction mixture and reduces the inherent pressure of the mixture against the leveling elements. Both the leading and the trailing screed are adjustably inclined away from the working direction. The adjustment of the screed position may be made, for example, by a spindle with a hand wheel.

Abstract: A road guard belt comprising a hollow belt-shaped body composed of an inflatable portion molded into one integral belt and a adapted to be inflated into an elongated tubular body by introducing fluid through a throttle hole therein. The hollow belt-shaped body is fitted to a road wall side facing the driveway.

Abstract: A road roller comprises a frame and a pair of drums, at least one of which is a guide drum, on which the frame is pivotally supported. A steering mechanism is attached to the guide drum for steering the road roller. The supporting mechanism for the guide drum includes a vertical pivot shaft coupled to the guide drum, a vertical anti-friction bearing on the pivot shaft for permitting the guide drum to pivot horizontally relative to the frame, and a flexible support coupled between the bearing and the frame for permitting limited lateral twisting of the guide drum relative to the frame. The flexible support comprises a pair of longitudinally spaced rubber mounts for absorbing longitudinal shocks but for inhibiting longitudinal twisting of the drum relative to the frame.

Abstract: The use of flake glass in road pavement and repair is disclosed. In particular, we disclose improvements in the formulations of asphalt aggregate wear surfaces, substrate layers and interface layers between the substrate and wear surfaces. In one embodiment we also employ an unsaturated monomer or an unsaturated elastomer.

Abstract: A method and device for collecting a layer of concrete paving bricks forming a brick disk in the form of a stretcher bond which may be used as one setting unit, is characterized in that the layer of the paving bricks is clamped together laterally with a collecting clamp with respect to their longitudinal axes for aligning purposes and, after releasing the collecting clamps, each row of bricks is individually clamped to their respective position at their head ends with clamps. The clamps with the clamped rows of bricks are then displaced with respect to each other in a parallel direction to achieve the desired setting arrangement and the collecting clamp is again engaged.

Abstract: An amphibious vehicle is disclosed including at least one outrigger pontoon member connected with the vehicle body for pivotal movement about a horizontal longitudinal pivot axis between retracted and laterally extended positions relative to the vehicle body. The pivot axis is adjacent the bottom portion of the vehicle body, seal means being provided for sealing the space between the vehicle body and the pontoon member.

Abstract: A torque converter has a driving shaft that frictionally drives an in-line driven shaft via rollers having transmission gears. The rollers are tapered and mounted on arms linked to a carrier that is splined to the driving shaft. The rollers are freely rotatable about axes inclined to the shafts and pivotable about respective pivotal shafts to engage a surrounding contact surface responsive to centrifugal forces. The contact surface is part of a control ring on a holder that is journalled to the driving shaft and the ring is connected to the converter housing to prevent turning. The contact surface, pivotal shaft axes and roller axes are all inclined to the center line of the driving shaft and if prolonged, intersect that line. The holder and ring can be axially displaced along the driving shaft to change the torque; the smaller diameters of the rollers turn the driven shaft slower.

Abstract: This invention relates to a method and apparatus for repairing asphalt concrete road surfaces wherein a tractor a steam box and a car mounted with a screw cutter are coupled in this order and a series of linearly operated equipment is used on the asphalt concrete paved road surface, including a heater car, an asphalt finisher and a road roller in this order after the car. Each of the equipment is made to advance at low speed and the asphalt concrete paved road surface is artificially heated by the steam box to impart fluidity to the road surface, after which it is cut with the screw cutter and the cut asphalt concrete is conveyed into a heating chamber of the heater car, and water content in the asphalt concrete is removed by heating and stirring.

Abstract: A relieve valve in a hydraulically operated clutch for the residual pressure caused by centrifugal force on the hydraulic fluid tending to produce limited engagement of the clutch.

Abstract: A concrete bridge girder support structure for use in a cantilever erection method is disclosed. The support structure comprises an upper shoe for use as a fixture to the girder through a sole plate fixed to the girder at a predetermined position, a lower shoe fixed on a pier and abutment, a movable part(s) disposed between the upper and lower shoes, and a movable plate placed for bridge-axial movement relative to the upper shoe. A concrete bridge girder erection method using such a support structure is also disclosed. The girder having the sole plate fixed thereto at the predetermined position is carried on the movable plate and continuously advanced along the upper shoe up to a predetermined erection position with bridge-axial movement of the movable plate. At the erection position, the sole plate is integrally fixed to the upper shoe of the support structure.

Abstract: A hinge lock which during standstill of a primary control shaft, locks a driven shaft actuating a control element and connected by a gear drive to the control shaft. The arrangement is particularly adapted for control hinges of slats on large aircraft, in which a tangential key free-wheel lock is connected to the driven shaft with at least two tangential keys facing each other and locking in one direction of rotation. An engaging element driven by the primary control shaft, shifts a key release between the tangential keys, depending on the direction of rotation. A transmission is connected between the primary control shaft and the auxiliary shaft such that the speed of the auxiliary shaft is a multiple of the speed of the rotating body of the tangential key free-wheel lock.

Abstract: A road roller comprises a central frame part, a main drive including a hydraulic pump and a steering control carried by the main frame part. Replaceable roller units each including a frame part detachably mounted on the central frame part at a front and rear end, respectively, of the central frame part comprise front and rear rollers. A hydraulic motor and a hydraulic steering mechanism are incorporated in at least one of the roller units, the hydraulic motor being connected to the hydraulic pump to be powered thereby for driving the roller and the steering mechanism being connected to the steering control for steering the roller.

Abstract: A two-to-one or greater slope is stabilized by rolling a vibratory compactor upslope and simultaneously vibrating the compactor's roller. The compactor comprises a frame on which is rotatably mounted a suitable compaction roller. An engine is rotatably mounted on the frame, and means are provided for adjusting the tilt of the engine relative to the frame, so that, in use, the engine will remain upright while driving the vibratory shaft of the roller. The engine is remotely controlled, as by radio waves, by an operator riding a vehicle on the shoulder of the embankment. A crane and winch on the vehicle riding on the embankment control the movements of the compactor on the slope.

Abstract: An improved sealing assembly for sealing the expansion gap between adjacent sections of a structure has elongated elastomeric pads laid end to end along the length of the gap with a groove in at least one of the end surfaces of each pad for containing a flowable sealant.The groove has an inlet port at the top edge of the end surface through which the flowable sealant may be injected, an intermediate sealing portion for housing the sealant to prevent debris and liquid from passing between the end faces, and a vent portion communicating between the intermediate sealing portion and the top edge of the end surface, so that sealant emerging from the top of the vent portion will indicate that the intermediate sealing portion has been filled.

Abstract: A releasable hold-down device is provided for use in a dockleveller wherein dock-raising springs are used to raise the dockboard. The hold-down device comprises a hydraulic cylinder assembly having the piston connected to the dockboard and the cylinder connected to the dockleveller frame. The cylinder assembly must thus expand and contract to permit the dockboard to be raised by the spring and lowered by the weight of a man standing on the dockboard. The cylinder assembly has fluid-filled stem and base chambers. A connecting conduit permits fluid movement between the chambers. A valve means in the conduit controls this fluid movement. There is provided means for mechanically opening the valve means to permit the dockboard to be raised by the spring with concomitant expansion of the cylinder assembly.

Abstract: A dock leveler for a dock loading surface is provided with includes a frame fixedly mounted adjacent the front edge of the surface, and an extension assembly mounted on the frame for movement between operative and inoperative modes. The assembly includes a dock panel hinged to the frame and a lip panel hinged to the dock panel. The dock panel is coplaner with the loading surface and the lip panel depends therefrom when the assembly is in the inoperative mode. A linkage is provided having pivotally connected first and second arms. An end of the first arm is pivoted to the frame and an end of the second arm is pivoted to the lip panel. Power means urges the dock panel to move from the inoperative mode to a raised position prior to assuming an operative mode. The dock panel will move to the raised position upon a predetermined external force being applied to the dock panel. A trip member is provided having a central section pivoted to the dock panel.

Abstract: A screed for leveling freshly poured concrete comprises a pair of handle assemblies each comprising a body, a first handle extending upwardly from the body, a second handle extending laterally outwardly and upwardly from the body, and a leveling bar, such as a length of lumber, releasably attached at its ends to the respective handle assemblies.

Abstract: Weathered asphaltic concrete road surface material is mined at each of a series of road locations and heated at or near the site of mining and future laydown to form particulate agglomerates of aggregate and asphalt in a form receptive to asphalt rejuvenation additives, mixed with such asphalt additives and passed to a laydown apparatus and returned to a road location near or at that location from which the weathered asphaltic concrete was initially taken. The steps of mining, rejuvenation and laydown and related storage and screening are simultaneous and continuous.

Abstract: A concrete vibrator machine wherein the vibrators thereof are mounted on individual supporting structures that are adjustable longitudinally of the main frame of the machine, and wherein the vibrators are raised and lowered on their individual supporting structures in such a manner that if the vibrators strike an obstruction during lowering thereof, lowering of the vibrators may stop without damaging stress being placed thereon.

Abstract: A metal truss structure which is characterized by chord and web members formed of rectangular tubing and with the chords of double construction to take advantage of the weight and cost savings and high torsional strength of rectangular tubing and arranged for easy and inexpensive fabrication by avoiding precise cutting and difficult welding requirement. This metal truss structure comprises chords, each including a pair of laterally spaced-apart rectangular tubing members positioned flat against opposite sides of the rectangular tubing web members at one corresponding end and welded exclusively by weld lines extending along the longitudinal intersections of the chord members with the web members for simple and automatic welding.