Showing papers on "Screed published in 1996"
Patent•
19 Jun 1996
TL;DR: In this article, a road finisher is used for simultaneously applying at least two surface layers, and each surface layer is applied to the highly-compacted surface layer and then, in turn, highly compacted to such a degree that recompaction is no longer necessary.
Abstract: A road finisher, which is used for simultaneously applying at least two surface layers comprises a chassis, a travelling mechanism, at least two premix containers arranged on said chassis, a lateral distributor associated with the respective premix container and adapted to have material supplied thereto via a conveyor path extending in the chassis, and lateral outriggers attached to the chassis as well as a dragged road-surface applying device used for applying a surface layer and arranged on said outriggers, all road-surface applying devices being high-compaction road-surface applying screeds for recompaction-free application of a surface layer, and each high-compaction road-surface applying screed constituting a rear screed, when seen in the direction of movement, which is constructed as a high-compaction road-surface applying screed which is adapted to be used for applying and compacting concrete. In the method of applying surface layers by use of such a road finisher, the surface layers are applied one immediately after the other and in one operation in such a way that each first surface layer is highly compacted during application to such a degree that recompaction is no longer necessary and each following surface layer is applied to the highly-compacted surface layer and then, in turn, highly compacted to such a degree that recompaction is no longer necessary.
55 citations
Patent•
31 May 1996
TL;DR: In this paper, a paving apparatus with a micropower impulse radar device was used to control a leveller 46 with actuators for adjusting screed elevation, slope, and extension.
Abstract: A paving apparatus 40 is provided with a micropower impulse radar device 58 connected to control a leveller 46. The leveller 46 is a screed provided with actuators 52, 58 for adjusting screed elevation, slope, and extension. The radar senses a reference, such as a string line 60, and operates the actuators 52, 58 to adjust the screed.
46 citations
Patent•
31 Oct 1996
TL;DR: In this article, a powered concrete screed with a roller rotatably attached to a chassis is described. But this is not the case in our case, since the handle length is adjustable along the length of the tubular member.
Abstract: A powered concrete screed apparatus comprising a roller rotatably attached to a chassis. The chassis includes an elongated member that extends in spaced, parallel relation to the roller, and is of substantially the same length as the roller. The elongated member is attached to the roller at one end by a motor removably mounted thereto and which includes gears extending therefrom which are operatively attached to the roller, and at its opposite end by a plate which extends between the tubing and roller. A pair of handles are mounted to and extend upwardly from the tubular member, and are independently, slidably adjustable along the length of the tubular member. The handles are also telescopically adjustable, thereby permitting their lengths to be selectively controlled. A throttle is removably attached to one of the handles and electrically connected to the motor, thereby permitting selective control of the power output from the motor. The screed apparatus also include a pair of wheel assemblies attached to the tubular member at opposite ends thereof. The wheel assemblies permit the apparatus to be easily moved to and from a worksite without damaging the roller.
38 citations
Patent•
12 Feb 1996
TL;DR: In this paper, an assemblage which forms in-situ monolithic concrete slab-on-grade foundations is an internally collocating monolithic forming unit, which unit is typically light weight enough to be maneuvered intact.
Abstract: An assemblage which forms in-situ monolithic concrete slab-on-grade foundations is an internally collocating monolithic forming unit, which unit is typically light weight enough to be maneuvered intact. The unit is comprised of a number of form members and an overhead screed. The concrete-surface-defining form members, preferably sections of light-gage cold-formed metal, also serve as struts defining foundation horizontal geometry by having controlled lengths and interconnections. Corresponding pairs of squaring wires control geometry as well, and are removed before finishing the concrete slab. Temporary support of the forming unit is upon coarsely threaded stakes. Each stake screws into earth with a high speed pneumatic impact wrench, and quickly secures simple form support components such as a slab clip. Resulting connections provide subsequent adjustment of any form member independently, or the entire forming unit simultaneously, in any direction or rotation before securing it into place, and pouring a slab on grade foundation.
27 citations
Patent•
27 Nov 1996
TL;DR: In a slip-form paver for road constructions of concrete, at least one transverse distribution is required as discussed by the authors, which is a high-compaction paving screed which is floatingly hinged by means of at least two extension bars.
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.
27 citations
Patent•
20 Aug 1996
TL;DR: In this paper, an improved extended auger arrangement and an improved asphalt paver with a tractor unit and a screed assembly, including a main screed and extendable screeds, were presented.
Abstract: An improved extended auger arrangement and an improved asphalt paver with a tractor unit and a screed assembly, including a main screed and extendable screeds, having such an improved extended auger arrangement, the extendable screeds extending laterally outwardly from the main screed such that the screed assembly spans a width substantially greater than the width of the tractor unit. The extended auger arrangement includes a pair of opposing, oppositely pitched, inner augers, rotatable about a substantially horizontal axis oriented perpendicularly to the direction of travel of the tractor unit and approximately spanning the width of the tractor unit, and a pair of oppositely pitched outer augers, rotatable about respective horizontal axes oriented substantially non-perpendicularly to the direction of travel of the tractor unit and approximately spanning the difference between the width of the tractor unit and the width of the screed assembly. Each of the outer augers is drivingly and pivotally connected by a universal joint to a respective one of the inner augers. A supporting structure provides fore-and-aft support for the outer augers.
16 citations
Patent•
22 Aug 1996
TL;DR: A concrete grading tool for grading, leveling and sealing wet concrete is shown and described in this article, which is comprised of a grading head which is made of a lightweight material such as aluminum and has a long handle extending outward therefrom.
Abstract: A concrete grading tool for grading, leveling and sealing wet concrete is shown and described. The grading tool is comprised of a grading head which is made of a lightweight material such as aluminum and has a long handle extending outward therefrom. The grading head of the present invention is designed such that it floats on top of the wet concrete. It has a triangular design and is substantially hollow therethrough. All three sides are kept at a minimal thickness. On the rearward facing surface is located an attachment block which threadably receives the handle. The handle has a first and a second support member angled downward and also attached to the grading head for additional support of the handle away from the centermost portion. The grading tool allows the user to rake, level, screed and place a precise finish on wet concrete.
11 citations
Patent•
18 Dec 1996
TL;DR: A vibratory concrete screed including alternating turnbuckles and tubular housings, mated together for adjusting tension and screeding surface camber, is described in this paper, which includes a laser alignment system for adjusting camber.
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.
7 citations
Patent•
23 Dec 1996
TL;DR: In this paper, a floor construction for a composting tunnel is described, where prefabricated hollow-core slabs are used as the prefabrics, the hollow cores of which form the main air ducts and at the aforesaid hollow cores holes (18) holes are formed downwards.
Abstract: The invention concerns a floor construction for a composting tunnel, which includes main air ducts (11) set inside cast concrete, from which distribution air ducts (12) extend to the floor surface. According to the invention in question, the floor (1) is formed of prefabricated hollow-core slabs (5) that are as such known, the hollow cores (11) of which form the aforesaid main air ducts inside the floor. The invention also concerns a method for manufacturing the floor construction of a composting tunnel, in which method prefabricated units are used in the floor construction and in which the pipe networks and ducts are formed in the floor construction for feeding air to the material on the floor. According to the invention, hollow-core slabs (5) are used as the prefabricated units, the hollow cores (11) of which form the aforesaid main air ducts and at the aforesaid hollow cores (11) holes (18) are formed downwards. Finally a surface screed (9) is cast using casting supports (13) set in the aforesaid holes (18).
5 citations
Patent•
07 May 1996
TL;DR: In this article, an expansion screed is mounted to a main screed 15 installed to the rear part of a chassis 11 so that its height may be adjustable with a built-in screw.
Abstract: PURPOSE: To save manpower and demand for less skilled work by automating the height control of an expansion screed for a main screed in an asphalt finisher. CONSTITUTION: An expansion screed 17, which is movable in the radial direction of a road surface, is mounted to a main screed 15 installed to the rear part of a chassis 11 so that its height may be adjustable with a built-in screw. A height detection sensor 21, which is installed to the expansion screed 17, detects a non-conforming height of the expansion screed 17 about a paved surface (a) formed on the main screed 15. A motor 45 is driven based on the non-conforming height information detected with this detection sensor 21, thereby turning the built-in screw in the direction which eliminates the non-conforming height and correcting the height of the expansion screed 17.
4 citations
Patent•
01 Mar 1996
TL;DR: In this article, a heating cable and control unit for use in heating floors, comprises cables with a plastic coating, which are placed in the screed of the floor, and connected to a power source via a cold conductor.
Abstract: A heating cable and control unit, for use in heating floors, comprises cables with a plastic coating, which are placed in the screed of the floor. The cables are connected together, and connected to a power source via a cold conductor. The heating cable (1) has a central, single core (2), an inner heating spiral (4), and an internal return (8) at the end away from the plug. The insulation preferably consists of a corrosion resistant material, e.g. PVC. The cable is used for heating floors.
Patent•
17 Sep 1996
TL;DR: In this paper, the authors proposed to shorten the base plate heating time at the start of work and prevent an accident due to fuel leakage by using an auxiliary heating device, which consists of a plurality of auxiliary burners.
Abstract: PURPOSE: To shorten base plate heating time at the start of work and prevent an accident due to fuel leakage. CONSTITUTION: When a base plate 13 of screeds 9, 11 heated by a main heating device 15 presses a heated mixture spread on a road surface to spread it uniformly, a power supply is shut off if a gas detection sensor 27 detects a leakage of gas which is a fuel of the main heating device 15 at the start of work. Moreover, if gas leakage is not detected, an auxiliary heating device 23 provided in the screeds 9, 11 in such a manner that it can be evacuated freely operates at the start of work to heat the screeds 9, 11 speedily so that the work can be started. The auxiliary heating device 23 consists of a plurality of auxiliary burners 23, and these auxiliary burners 23 heat the screeds 9, 11 uniformly. Also, ignition of the auxiliary heating device 23 is done manually, and extinguishment is done automatically.
Patent•
24 Oct 1996
TL;DR: In this paper, a method of producing a screed, using a mixture which is mixed with water to give a pourable screed compound which can be smoothed flat, the mixture consisting of 50 to 90 % by vol. of rigid expanded-polystyrene granules with a diameter lying between 0.5 and 50 mm and 10 to 50 % by synthetic-resin mortar, was described.
Abstract: The invention concerns a method of producing a screed, using a mixture which is mixed with water to give a pourable screed compound which can be smoothed flat, the mixture consisting of 50 to 90 % by vol. of rigid expanded-polystyrene granules with a diameter lying between 0.5 and 50 mm and 10 to 50 % by vol. of synthetic-resin mortar, the compound being spread on a bed, smoothed flat and allowed to cure to give a fluid-permeable layer.
Patent•
[...]
14 Feb 1996
TL;DR: In this article, the authors describe a suction pipe or pipe through which materials (sand or aggregate) are conveyed by suction device using a combination of agitation and fluid flow movement of the said materials into the screed pump until it is fully loaded or charged.
Abstract: The Apparatus consists of a conduit or pipe 24 through which materials (sand or aggregate) are conveyed by a suction device 22. This entails a combination of agitation and fluid flow movement of the said materials into the screed pump until it is fully loaded or charged. One end of this conduit is placed in or on the pile 30 of material to be conveyed. The discharge end of the conduit may be connected to the screed pump in various ways, including being permanently connected to an inlet in the screed pump vessel in which case a shut off valve means would be required to isolate the delivery conduit during the emptying process of the screed pump.
Patent•
12 Mar 1996
TL;DR: In this paper, a road finisher is coupled with a paving screed via an elastic supporter and actuating the screed as an absorber mass to prevent an excessive pitch movement.
Abstract: PURPOSE: To prevent an excessive pitch movement of a road finisher by coupling a chassis and paving screed via an elastic supporter and actuating the screed as an absorber mass. CONSTITUTION: As a road finisher F moves, a paving screed B as an absorber mass is lowered. Then a pressure medium moves from a piston fall side of a lift cylinder 8 of a lift device H into a hydraulic piping and enters an accumulator through a control valve and buffer restrictor for buffering and absorbing a rocking. When a paving screed B rises, the pressure medium is released into a tank from the accumulator through the buffer restrictor.
Patent•
18 Apr 1996
TL;DR: In this paper, the authors proposed a method to enhance the quality of a dam main body by lowering a screed main body on a placing surface, temporarily storing it by uniformly filling mortar of a mortar hopper by reciprocatively moving a nozzle in a laterally long screed principal body by a nozzle moving means, and delivering a preset fixed quantity of mortar from a mortar delivery port together with the start of a movement of a vehicle.
Abstract: PROBLEM TO BE SOLVED: To enhance a quality of a dam main body by lowering a screed main body on a placing surface, temporarily storing it by uniformly filling mortar of a mortar hopper by reciprocatively moving a nozzle in a laterally long screed main body by a nozzle moving means, and delivering a preset fixed quantity of mortar from a mortar delivery port together with a start of a movement of a vehicle. SOLUTION: When a force feed pump 4 is driven, mortar is temporarily stored by being forcibly fed in a screed main body 8 through a flexible hose 5 and a nozzle 6. When mortar is forcibly fed, the nozzle 6 is reciprocatively moved over the total wide length in the screed main body 8 by a nozzle moving means 7, and the mortar delivered from the nozzle 6 is filled by a uniform quantity over its total length in the screed main body 8. Next, a door body 30 is opened by a prescribed quantity, and when a vehicle 1 is advanced, a necessary quantity of mortar is delivered from a mortar delivery port 9. COPYRIGHT: (C)1997,JPO
Patent•
11 Jan 1996
TL;DR: In this article, a concrete placing skip with two curved bottom opening doors is described, supported on arms pivoted at each side by vibrator units and transverse projecting screed bars, and the skip is charged with concrete and traversed across the top of a slab mould with door vibrators running.
Abstract: The concrete placing skip (10) has two curved bottom opening doors (18) supported on arms (20) pivoted at each side (22). Damper units (24) are introduced between the pivot blocks on the skip sides, and the door support arms. Both curved door members are fitted with vibrator units (26) and transverse projecting screed bars (28). - The skip is moved left or right (X) on rollers (30) on support rails, and is pulled by chains (32). The skip is charged with concrete and traversed across the top of a slab mould with door vibrators running. The concrete is vibrated through the discharge opening into the mould.
Patent•
02 Apr 1996
TL;DR: In this article, a semi-circular recess for receiving support pin is installed in the upper part of the rear arm of an asphalt finisher to separate the body of the finisher from the screed part.
Abstract: PURPOSE: To easily make transportation at low cost by furnishing a mechanism to separate the body of an asphalt finisher simply from a screed part, and thereby transporting the body to a self-loader and the screed part to an ordinary truck. CONSTITUTION: A screed arm is divided into a rear arm 1b and front arm 1a where a screed elevating/sinking cylinder 8 is installed, and a fixing pin insert hole 7a is provided in the lower part of the back of the front arm 1a while a semi-circular recess 7b for receiving support pin is installed in the upper part. On the rear arm 1b side, on the other hand, a pair of front arm pinch plates 9, 9 are secured to the front extremity, and a fixing pin insert hole 7c is provided in the lower part of the pinch plates 9, 9 while a support pin 6 is installed in the upper part. The support pin 6 of the rear arm 1b is borne by the recess 7b in the front arm 1a, and the pin insert hole 7a in the front arm 1a is aligned with the hole 7c in the rear arm 1b, and then a fixing pin is inserted.
Patent•
23 Apr 1996
TL;DR: In this paper, a drive shaft 16a and a driven shaft 17a are pivoted horizontally on a screed in parallel with each other and at the same height, and a drive gear 19a and driven gear 20a with the same number of teeth are fitted closely to the drive shaft and the driven gear 17a, respectively.
Abstract: PURPOSE: To reduce noise and vibration near a work site without lowering the stamping efficiency of a screed. CONSTITUTION: A drive shaft 16a and a driven shaft 17a are pivoted horizontally on a screed in parallel with each other and at the same height. Also a drive gear 19a and a driven gear 20a with the same number of teeth are fitted closely to the drive shaft 16a and the driven shaft 17a, respectively. Then a first eccentric weight 21a is installed fixedly just beneath the drive shaft 16a, and a second eccentric weight 23a is installed fixedly just above the driven shaft 17a. When the drive shaft 16a is rotated, the first and second eccentric weights 21a and 23a are rotated in the direction opposite to each other about their respective axes O1 and O2 . In this case, the vertical components of both centrifugal forces caused by the first and second eccentric weights 21a and 23a are offset, and the horizontal component only acts in the right and left same direction, resulting in vibration of the screed in horizontal direction.
Patent•
02 Apr 1996
TL;DR: In this article, an asphalt finisher is equipped with a screed part 5 having a heating device 14 and a tamper 8 and a strike-off plate 7, where a duct 17 is installed between the screed element 11 and the strike off plate 7. Inside the plate 7 another duct 20 is furnished ranging over approx. the whole width of screed 11, and small holes are provided at a certain spacing at the under-surface of the duct 20 so that the undersurface 7a of the plate7 can be heated uniformly.
Abstract: PURPOSE: To allow reforming an existing machine simply and enhance the heating performance by in a method to make heating with the exhaust heat after the heating of a strike-off plate screed for preventing damage of a paving surface in case road paving is conducted in a cold place. CONSTITUTION: An asphalt finisher is equipped with a screed part 5 having a heating device 14 and a tamper 8 and a strike-off plate 7, wherein a duct 17 is installed between a screed element 11 and the strike-off plate 7, and the plate 7 is heated with exhaust heat generated after the screed 11 is heated. Inside the plate 7 another duct 20 is furnished ranging over approx. the whole width of the screed 11, wherein communication with the duct 17 is generated on both sides of the duct 20, and small holes are provided at a certain spacing at the undersurface of the duct 20 so that the undersurface 7a of the plate 7 can be heated uniformly.
Patent•
24 Oct 1996
TL;DR: In this paper, a method of producing a screed, using a mixture which is mixed with water to give a pourable screed compound which can be smoothed flat, the mixture consisting of 50 to 90 % by vol. of rigid expanded polystyrene granules with a diameter lying between 0.5 and 50 mm and 10 to 50 % by synthetic-resin mortar, the compound being spread on a bed, smoothe flat and allowed to cure to give fluid-permeable layer.
Abstract: not available for EP0766655Abstract of corresponding document: DE19514820The invention concerns a method of producing a screed, using a mixture which is mixed with water to give a pourable screed compound which can be smoothed flat, the mixture consisting of 50 to 90 % by vol. of rigid expanded-polystyrene granules with a diameter lying between 0.5 and 50 mm and 10 to 50 % by vol. of synthetic-resin mortar, the compound being spread on a bed, smoothed flat and allowed to cure to give a fluid-permeable layer.
Patent•
10 Oct 1996
TL;DR: In this paper, a device for producing a screed, e.g. for a swimming pool, was described, once vertical walls have been constructed by pouring screed concrete into and through said walls.
Abstract: A device for producing a screed, e.g. for a swimming pool, once vertical walls have been erected by pouring screed concrete into and through said walls. The device comprises a number of interconnected members (1, 4) for forming a supporting footing for walls with two openings for pouring the concrete.
Patent•
13 Mar 1996
TL;DR: A barrier layer comprises a base layer A, a screed B incorporating heating elements 1 and temperature sensors 2 as discussed by the authors, and an insulant layer C separated by a vapour seal D, and a wearing slab E.
Abstract: A barrier layer comprises a base layer A, a screed B incorporating heating elements 1 and temperature sensors 2. Above the screed B is an insulant layer C separated by a vapour seal D, and a wearing slab E. The cold area F is above the wearing slab E. It is desired that the 0{C isotherm should be kept generally at the position G indicated within the wearing slab E. The heating elements 1 will be heated individually and in sequence as necessary to maintain the temperature of each heating element within a range of +3.0 to +4.5 DEG C through circuitry controlled by the sensors 2.
Patent•
10 Jan 1996
TL;DR: In this paper, an elongate spacer assembly between adjacent sections of flooring is presented to permit expansion and contraction of the flooring, where the assembly comprises an upper resilient portion in the form of a strip of neoprene 16 sandwiched between two stainless steel plates 14.
Abstract: An elongate spacer assembly 10 loctable between adjacent sections of flooring 26 to permit expansion and contraction thereof. The assembly 10 comprises an upper resilient portion in the form of a strip of neoprene 16 sandwiched between two stainless steel plates 14. A spacer portion 22 extends from the strip of neoprene, with the portion 22 contacting the neoprene 16 between the plates 14. Keying means are provided on the assembly 10 either in the form of a metal bar 24 extending through the plates 14, or in the form of formations on the spacer strip; these key into screed 28 beneath tiles etc., 26.
Patent•
16 Jun 1996
TL;DR: In this paper, the construction of sloping slate roofs composed of circular plates with two radial grooves which together form angles of 90 degrees and with a width/length ratio of 1:4, the plates being placed on screeds (screed boards, straight-edges) in successive courses with minimum 2-cm overlaps under the lower vertex of the grooves.
Abstract: Improvements to the construction of sloping slate roofs composed of circular plates with two radial grooves which together form angles of 90 degree and with a width/length ratio of 1:4, the plates being placed on screeds (screed boards, straight-edges) in successive courses with minimum 2-cm overlaps under the lower vertex of the grooves, provision being made for the rotation of the end plates in each course through predetermined angles in order to accommodate junctions with beams (rafters) and edges or planes which are inclined.