Abstract: This disclosure is concerned with apparatus for enabling extension or other leveling adjustment of manhole cover supporting structures and the like comprising extension spacer rings resiliently compressed in self-storing fashion adjacent a support sleeve portion of the supporting structure, and adapted to be forced downward from storage to expand into position below the sleeve to extend or adjust the level of the same.

Abstract: The invention relates to a machine for providing milled or peeled road surfaces with a coating, comprising a chassis including a drive motor and having in the front portion thereof a supply or storage container for the material to be applied and in the rear portion thereof a plank-shaped finisher wherein between said supply container and said finisher a mixing device is disposed, which is provided with a first conveyor device feeding the material from said supply container and a second conveyor device feeding the milled-off or peeled material from the ground.

Abstract: A vibrating concrete screed having a motor driven vibrating shaft in an elongated frame mounts at each end of a single or interconnected plural frames a detachable winching unit driven by the shaft through a fluid motor. The screed may be winched automatically, at varying angles, at different speeds at each end and with the winching units performing a screeding function.

Abstract: In a method for resurfacing a road, the road surface is first plastified and broken-up by first and second separable devices. The broken-up material is immediately distributed on the road surface by the second device, whereby the broken-up material is simultaneously rearranged and profiled or contoured without the introduction of fresh asphalt or bituminous material at this point of time. A road surfacing or repaver apparatus forming a third separate device then applies fresh asphalt or bituminous material onto the broken-up distributed, rearranged and profiled top surface of the road. Preferably, two distributions of the broken-up material are employed prior to the asphalt application and compaction of the broken-up and distributed material and the new asphalt material. A truck supplies fresh asphalt or bituminous material to the repaver.

Abstract: A hole in a road, airfield runway or in the ground is filled or partly filled by partly filling the hole with a plurality of separate bodies of concrete, rock or other solid material, and filling interstices between the separate bodies and wholly or partially filling the remaining space in the hole with a hardenable mixture of cold setting synthetic resin and filler, which hardenable mixture sets and bonds firmly to the surfaces of the separate bodies. Preferably, before the hardenable mixture is introduced, a flexible fluid--impermeable covering is applied over the partly-filled hole and is sealed to the surrounding ground surface to form a fluid-tight enclosure, and air is evacuated from the enclosure.

Abstract: A passenger conveyance vehicle loading and unloading ramp has one end pivotally supported adjacent a terminal building and the other end supported for movement into and away from a loading position at a vehicle door includes an enlarged generally cylindrical head mounted adjacent the outer end of the ramp for limited pivotal movement about a horizontal axis extending transversely of the longitudinal axis of the ramp, and a cab or vestibule mounted on the enlarged head for movement therewith and for pivotal movement about a generaly vertical axis for contact with the vehicle throughout a wide range of angles between the longitudinal axes of the ramp and of the conveyance vehicle. The vestibule is supported entirely from its bottom portion whereby the vestibule structure may be relatively lightweight since only minimal loads will have to be transferred between the top and bottom of the vestibule structure.

Abstract: The invention relates to devices of trans-shipment between a ship and a fixed structure situated at sea, which devices comprise a directable gangway, one end of which is mounted to pivot about a vertical axle fixed to the fixed structure, the second end comprising an air cushion designed to rest on a free area of the ship's deck.

Abstract: There is disclosed an airplane passenger loading ramp defining a walkway having a cab at the free extremity thereof which includes a weather protective mating device for mating with the contour of an airplane around the entry door thereof. A generally tubular shaped fire protective shroud surrounds such sealing device and is connected on one end with the walkway around the exterior of such sealing device and has the opposite extremity thereof extendable telescopically over such sealing device to mate with the contour of such airplane. An operator is mounted on one end from the walkway and carries on the free extremity thereof of the free end of such shroud for selective extension of such shroud from a retracted position to an extended position mating with the airplane contour.

Abstract: An expansion joint of the construction that opposing upper wavy end face plates with a regular gap therebetween and lower wavy end face plates with the upper end thereof bonded to the lower end of the upper wavy end face plates are provided oppositely, an elastic means is interposed between said both upper wavy end face plates, upper edge of said upper wavy end face plates are provided in flush with or close to the road surface, anchor materials are provided protrudingly at the back of said both upper wavy end face plates and are connected to reinforcing material, concrete or synthetic resin is placed at the back of each of said wavy end face plates and a small gap is provided between the lower end of said lower wavy end face plate and the bottom surface of a joint fitting portion to prevent the both from touching with each other.

Abstract: A ramp is pivotably mounted in a road bed transverse to the flow of traffic. The ramp pivots between a first position raised above the surface of the road bed and a second position approximately flush with the surface of the road bed, but preferably slightly raised therefrom. A spring biases the ramp to its second position, and applies a return force to the ramp when it pivots from its second, i.e., intermediate, position to a third, i.e., depressed, position substantially flush with the surface of the road bed. Responsive to traffic approaching the ramp from one direction, the ramp pivots from its intermediate position into its depressed position as the traffic passes over the ramp. Responsive to traffic approaching the ramp from the opposite direction, the ramp pivots from its intermediate position into its raised position as the traffic passes over the ramp to signal travel in the wrong direction.

Abstract: A unitary flight chain assembly for a paver is illustrated as having mounting structure for removably positioning same upon a support structure carried beneath the hopper of the paver, and removable covers are provided to facilitate lifting the flight chain assembly out of the paver and for replacement thereof.

Abstract: The present invention relates to a cargo loading apparatus for loading a cargo disposed on a first level onto a deck disposed on a second level generally above the first level, the deck having a cargo supporting surface and an end. The cargo loading apparatus includes a platform with a cargo supporting surface for supporting the cargo to be loaded onto the deck, a base which is hingedly connected to the platform, and means for pulling the base and the platform connected thereto onto the cargo supporting surface of the deck. The base is of a sufficient size such that the base and the platform are positionable in an initial loading position wherein the platform is supported generally on the first level and the base extends from the platform generally toward the deck to a position wherein the end of the base is disposed generally above the second level and a portion of the base engages the end of the platform.

Abstract: A joint former for hardenable material such as concrete comprises two essentially identical web members which are releasably attached to each other by a two-part friction coupling to form an assembly which is generally a T-shaped assembly. Each web is configured along at least one edge to form a first coupling part and along a central portion of at least one surface to form a second complementary coupling part so that any two of such webs can be attached to each other to provide a T-shaped assembly. In use the web forming the body of the T is inserted into the hardenable material, the bar web serving to align and position the inserted web. The bar web is then detached from the inserted web and releasably attached to another essentially identical web to form another T-shaped assembly suitable for use in the manner just described.

Abstract: An asphalt layer adapted to be towed after a towing vehicle comprising in combination on the one hand a back wall (6), the lower edge of which determines the upper surface of the layer of material which is laid out, on the other hand a trough-shaped bucket (9) in front of the back wall. The bucket can be turned in relation to the back wall about a horizontal fulcrum (X) parallel to the back wall, and the material in the bucket can be emptied out into the space in front of the back wall. Partitions (39) and (40) or (30) and (31), are disposed in said space and in the bucket to regulate the layer of material to the required width. The first mentioned partitions have a concave front edge which follows on the arc which is generated by the front edge of the bucket when the bucket is turned about its fulcrum. The device (1) may appropriately be connected to a central-pivoted tractor (2).

Abstract: A safety leg construction for a dockboard which acts to limit normal slow descent of the ramp, as well as rapid descent of the ramp, after a truck pulls away from the loading dock. Legs are hinged to the undersurface of the forward edge of the ramp and are biased to a forward supporting position and can be pivoted to a retracted non-supporting position. The legs are coupled to the lip of the dockboard by a coupling member which is pivoted to the leg and has an abutment positioned to be engaged by a cam attached to the lip as the lip is extended to thereby move the coupling member and the leg to the retracted position. An acceleration responsive latching element serves to lock the coupling member to the leg so under normal operation they move as a unit.

Abstract: A dock leveler or transfer bridge for ramps, comprising a bridge plate pivotally journalled at its rear end about a horizontal axis on a ramp. The front end of the bridge plate has a foldable or pivotal extension pivoted downwardly in the rest position and, in the working or effective position, pivoted into the plane of the bridge plate. The extension serves for exclusive support of the bridge plate upon the vehicle which is to be loaded or unloaded. When the dock leveler is not being used, the bridge plate is supported upon a pendulum-like strut or support located at the front end thereof. This pendulum-like support, by means of a lever pivotal with the extension, holds or maintains a pivot position for introducing the bridge plate into a ramp recess. In this pivot position, the strut or support cannot correspond or align with its abutment.

Abstract: The inclined projecting spikes used by parking lots to discourage entrance through the exit are guarded for protection of pedestrians. The guards take the form of either shrouds over the spikes or movable members disposed near the point of the spikes and spring-biased so that the guards will not deflect under the weight of a pedestrian's foot, but will deflect under the weight of an automobile wheel to thereby expose the spikes and deter runaway entry into the exit of a parking lot.

Abstract: A method of sealing bridge deck joints on a highway in which the deck members have the road surfacing material removed therefrom and a flexible composition of chips of aggregate in a rubberized binder, such as bitumen, pitch, pitch-tar or tar is inserted in the removed area as a resilient sealing material.

Abstract: Track driven machines useful in slip form and other road paving operations embodying a support frame, with hollow frame members serving as cooling reservoirs for hydraulic fluid, supported by hydraulic cylinders on a pair of power driven, endless tracks. The frame is maintained in a pre-oriented plane as the machine moves along terrain by a hydraulic fluid control system operating cylinders in response to torsion bar-registered twist of the frame, string-line feeler means and a level controller. Two winches driven by respective hydraulic motors are mounted ahead of each track. Cables wound thereon may be attached to stationary objects to provide auxiliary forward drive(s) for each track, or in emergencies as the replacement drive for a disabled track.

Abstract: A light-reflecting arrangement includes a stack of clean light-reflecting plates which are mounted on a support for gradual advancement, one after the other, into an operative position in which the respective light-reflecting plate replaces the previous one which may have become soiled while dwelling in its operating position, so that a relatively clean plate will be exposed in the operative position at all times to act as a reflector for oncoming traffic. The light-reflecting plates which have been replaced descend by gravity either to form another stack of used light-reflecting plates, or to be collected in a receptacle. The stack of the light-reflecting plates may be advanced by a pusher or by a threaded shaft cooperating with a threaded bore of the respective light-reflecting plate. The pusher may be advanced or the threaded shaft may be rotated by a spring-energized or a battery-energized motor, or by a drive which is energized by ambient pressure or temperature fluctuations.