Showing papers on "Screed published in 1989"

Apparatus for screening and trowelling concrete

Abstract: Disclosed is an apparatus for screeding or trowelling concrete or similar materials. The apparatus has a turret, mounted on a mobile frame. A telescopic boom is mounted in cantilevered fashion on the turret. A machine head, mounted on the distal end of the boom, is rotatable about a vertical axis. An attachment, such as a screed or a trowel, is attached to the machine head. The level and angle of the frame can be set to a selected elevation relative to a rotating laser beam by raising or lowering three hydraulic legs. The machine head can raise or lower the attachment to set the attachment at a selected elevation.

Apparatus and method for controlling laser guided machines

Abstract: A guidance system and method for increasing the accuracy of laser guided machines such as screeds, graders, earth movers, floor saws and floor finishing machines. The system includes a laser beam receiver for sensing a laser reference beam provided off the machine. The laser receiver signals an electrical circuit when the laser beam is sensed in both centered and off-center regions. The electrical circuit operates a controller such as a solenoid operated fluid valve which controls a power source such as a fluid cylinder to move a machine element in one direction, such as raising a concrete screed, when the beam is sensed in the centered region, and in the other direction, such as lowering the screed, when the beam is sensed off-center. The method includes controlling the power source to continuously cycle the machine element between centered and off-centered regions to reduce the dead band, i.e., nonactive tolerance range, of the system.

Paving machine having transversely and longitudinally adjustable grade sensors

Abstract: A paver of the floating screed type which is capable of operating with screed extensions for laying down pavement at various widths includes a self-contained, stowable and extensible grade reference system with a wide, planar adjustment range. The grade reference system provides an adjustment range for positioning a grade sensing device on either or both sides of the paver both forward and transversely outward from a selected support point on the paver. The grade reference system has a pivotally outer support member which permits the sensing device to become positioned at any selected setting of an arcuate path forward of a rearward position in substantial alignment with the leading edge of the screed to a forward position determined by the length of the member. The pivotal adjustment range of the outer support member is augmented by a transverse adjustment range effected by an extension or retraction of a corresponding support member to shift the pivot axis of the outer support member respectively outward or inward. The combination of the two adjustments provides for a mix of anticipatory grade change sensing combined with laterally outward extensions of the screed beyond the full extension range of the screed.

Apparatus for drying insulating materials beneath a screed

Abstract: The invention relates to an apparatus for drying layers, in particular insulating materials beneath screed floors, having a blower which extracts the moist air beneath the screed and forces said moist air to a drier, and a blower which forces the dry air under the screed, the two blowers (6, 7) being fastened in the same sound-insulated housing (1).

Quick disassembly screed construction

Abstract: A vibrating portable screed of the type made up of sections having screed blade means at the base and a ridge portion at the top employs a turnbuckle assembly in the ridge portion held together by a removable pin and other removable pin connected means in the base portion thereby enabling the sections to be quickly assembled and disassembled by installing and removing the pins.

Holder for screed rail

Abstract: An improved adjustable holder for a screed rail for mounting the rail above the ground so as to eliminate the need for concrete pads which are presently used to support such a screed rail on the ground. The holder includes an upright stake or post having a sleeve adjustably mounted on the post for movement along the post. A bar extends laterally from the sleeve and is coupled thereto by a pivot pin so that the angle of the bar relative to the ground can be adjusted. Once adjusted, the bar is fixedly held in place by a clamping structure including a curved, slotted arm pivotally mounted at one end thereof and coupled near the opposite end to the bar. Slidable members are on the bar for holding the side flanges of the screed rail in place on the bar at the proper positions. Thus, the holder of the present invention has three degrees of freedom, namely vertical movement of the sleeve, pivotal movement of the bar in a vertical plane, and linear movement of the flange holding members on the bar.

Measuring control means for pavement levelling thickness

Abstract: PURPOSE:To control a screed to come to an optimum desired-value, by detecting a compaction degree after the compaction of a finisher, and by comparing a desired pavement value, found from a desired density, a desired paved thickness, and the compaction degree, with a present paved thickness, to control them. CONSTITUTION:A paved thickness measuring control means is basically composed of a paved thickness measuring section 20, a desired paved thickness processing section 50, an adding point 52 for finding a deviation between a paved thickness T(x) and a desired pavement value Ta, and a screed angle actuator 54 controlled by the deviation. Then, arithmetic is performed on the paved thickness T(x), through a level before pavement Sc, a level after the pavement Se, front wheel warping Wf, rear wheel warping Wr, and a running distance. In the meantime, arithmetic is performed on the desired pavement value Ta, through the density Pa of a paved road surface, a desired paved thickness Tt, and a desired density Pt. As a result, after compaction, the paved thickness and density are not measured, and the pavement of a desired designing value can be executed.

Roller-blind casing

Abstract: The roller-blind casing is arranged in the wall-outer-side lintel region of a wall opening, the roller-blind casing (5) being plugged onto guide rails (9) which are fastened laterally on the vertical legs of a window frame (8). It has a rolling-up reel (6) for the roller blind and a releasably arranged covering (15) which is located beneath the rolling-up reel (6), closes off the lower opening of the roller-blind casing (5) and on whose front border there is provided a plastering screed (13) which serves as a bottom termination and as a means for delimiting the end-side roller-blind-casing covering, which is to be covered over by plaster (14). The plastering screed (13) is releasably fastened on the front longitudinal side of the covering (15) by fastening means (18) which are to be introduced from underneath and/or it is attached on the front longitudinal side of the covering (15) by adhesive bonding, with the interposition of an insulating sheet (20). After mounting on site and after finishing the plastering work, the releasable fastening means are removed (Fig. 1).

Bent surface finishing device

Abstract: PURPOSE: To automate a finish by providing a plurality of screed members, a plurality of elevators and others raising and lowering the screed members, and raising, lowering and controlling the screed members based on data inputted in advance. CONSTITUTION: Leveling arms 2 are mounted on both sides of a car body 1 so that they are capable of swiveling, and a rectangular frame body 3 is consti tuted so that it is capable of moving up and down. Up and down moving bodies 10B and 14B moving by the first hydraulic motor 7 are provided to an internal frame 5 of the frame body 3, and a screed plate 16 provided to the lower end is mounted to the inside of a plane at right angles to the froward direction of a car so that it is capable of sliding. Then, a position sand the like of the plate 16 corresponding to a bent surface to be constructed is inputted to a micro-computer in advance to run the car 1. An asphalt mixture is spread over by means of a screw spreader 30, and the bent surface to be compacted with compaction members 25 and 27 is finished in the bent surface to be required by oscillating the plate 16 by an oscillation device. COPYRIGHT: (C)1990,JPO&Japio

Shaft coupling construction for a vibratory screed

Abstract: A shaft coupling construction for a vibratory screed. The screed includes at least two vibratory shafts which are disposed in end-to-end relation and an end of each shaft is secured within a bore in a sleeve or connecting member. Each shaft is mounted for eccentric motion to impart vibration to the screed. Each adjacent pair of connecting members are secured together by a flexible tubular coupling, and to transmit rotation between the shafts, the connecting members are provided with external splines which mate with internal splines on the tubular coupling. The spline connection is not symmetrical and is arranged so that the connecting members can be engaged with the tubular coupling only in one circumferential position, thereby insuring that the eccentricity of one shaft is circumferentially aligned with the eccentricity of the other shaft.

Apparatus for use in applying a thin resinous coating to existing surfaces

Abstract: A device for use in applying a thin resinous coating to existing surfaces, such as concrete highways, to resurface and restore the same and improve their physical properties, such as skid resistance comprising two parallel supporting beams, a screed box having a bottom, two sides and a front and back sides, the bottom of which is attached to the parallel beams and the screed box having an adjustable dispersing gate at the back adapted to dispensing a controlled amount of the resinous binder in the box, at least one rotatable screed brush adjustably attached between the two beams behind the screed box and being adapted to bringing the dispersed binder in contact with the surface and pushing out any air that may be trapped under the coating, at least two spaced levelling bars perpendicularly and adjustably attached between the beams and being adapted to spreading and levelling the binder passing under the brush, at least one of the levelling bars being adapted to applying downward pressure on the layer of binder applied to the surface.

Pavement thickness detecting device

Abstract: PURPOSE:To easily calculate the thicknesses of pavement of a road surface by measuring a first coordinate in a prescribed portion of a screed, and a second coordinate of a road surface before pavement at a place apart therefrom by a prescribed distance, so as to be subjected to arithmetic processing. CONSTITUTION:A first coordinate in a prescribed portion of a screed 3 in an absolute coordinate system is measured by a first measuring system. Next, a second coordinate of a road surface 5 before pavement in the absolute coordinate at a place apart from the prescribed portion by a prescribed distance is measured by a second measuring system. Then, on the basis of the measured results of the first and second measuring systems, the first and second coordinates are calculated by an arithmetic unit 14, and the values are displayed in time-series on a display unit 13. Thus, the measured results of the undulation of a road surface, the undulation of pavement, and the thicknesses of pavement can be simultaneously displayed, so that the determination of the amount of operation for maintaining the flatness of a pavement surface 6 can be easily carried out.

Screed rail system

Abstract: A system for leveling concrete to provide a flat, planar upper surface. The system involves the use of elongated screed rails including upper and lower edges. The lower edge of each screen rail includes an elongated slot in each end portion. Each screed rail can be positioned over upright grade pins which extend into the slots and rest against the underside of the top edge of the screed rail. A leveling or strikeoff rod having a straight lower edge is supported on the upper edges of the screed rails. When the leveling rod is drawn along the screed rails it levels the poured concrete and provides a planar concrete surface.

Adjustable screed support

Abstract: An adjustable screed support for supporting one end of a screed during screeding of cement on a wall generally comprises a support bracket for attachment to the wall support structure including a stand-off portion extending outward, away from the wall support structure; and an elongate beam which is adjustably attached to the support bracket stand-off such that the distance of the top side of the beam from the wall support structure and the angle of the line of the beam the wall support structure are variable. The beam top side in side view is a straight line. The beam has holes side to side through its web portion and the support bracket stand-off portion has conguent holes. Cement from each side of the screed support flows through the holes and bonds to the cement on the other side.

Roller compacted concrete paves factory roads

Abstract: Saturn Corporation, a subsidiary of General Motors, is rapidly completing its new $1.9 billion auto manufacturing and assembly plant on a 2500-acre site near Spring Hill, Tennessee, about 35 miles south of Nashville. More than 650,000 sq yd of 7-in.-thick, roller-compacted concrete (RCC) pavement is being placed, half on access roads and the main entrance way to the huge plant and the remainder on parking and staging areas. Two ABG Titan 410S asphalt pavers place the RCC pavement atop a hard base consisting of 4- to 6-in. compacted crusher-run limestone. The German-made pavers have double tamping bars located in front of the vibrating screed that strike and compact the surface of the pavement 1400 times per minute as the pavers move forward. An Ingersoll-Rand DA50 double-drum roller with bevel-edged drums achieves nearly a 1/2 in. of additional compaction on its first pass over the extruded slab. Two to five additional passes by the same roller, or by a Bomag BW160AD, complete the compaction. The rollers also work and finish the surface of the slab. A paving crew of 30 to 35 normally works six 9-hr. days a week, averaging about 1000 cu yd per day.

Gully fitting for a tiled floor

Abstract: The surfaces (33) of the panel into which the gully is cast are continued on all sides by glass fibre grids (40). These produce bonding with the adjoining screed, with the result that a tension-resistant connection is ensured when tiles are attached by adhesive bonding or mortar. According to a preferred embodiment, the panel can be additionally anchored in the screed by means of cast-in steel fabric mats.

Rolling screed spreader box

Abstract: A spreader box for spreading cold mixed asphaltic concrete paving mixtures including a supporting frame or "bridge" attached to a left and right side plate Within the spreader box and at the front portion of the box is situated a left and right side hydraulic motor or other power means, which is used to power a left and right side auger for lateral distribution of the paving mixture Adjustment means on each end and in the middle to allow for vertical adjustment of the distribution auger A left and right side "ROLLING SCREED" roll which has an adjustment means on each end and in the middle to allow for vertical adjustment of depth of spread A left and right side compression roll which has adjustment means at each end and in the center for vertical adjustment of down pressure Screed roll and compression roll connected by chain and sprocket or other power transfer means One or more wheels or caterpillar tracks are mounted on each side plate

Road surface reproducing device equipped with automatic feed device for reproduction mixture

Abstract: PURPOSE:To keep a residence amount of a reproduction mixture through control of a mixing device and a spreading screw by means of data from a sensor, by providing a sensor to measure a residence amount of a reproduction mixture in a position right before a screed CONSTITUTION:A residence amount of a reproduction mixture in a position right before a screed 5 is measured by means of a non-contact type sensor S, eg an ultrasonic sensor When a residence amount is decreased, a spreading screw 4 is rotated at a high speed by a central computing device according to the data, and an output from other device is also controlled according to the data When a residence amount is increased, control is effected in a reverse way to the above

Device for ensuring footstep-sound insulation on joints of floating screeds for drying rooms and wet rooms

Abstract: Footstep-sound insulation is only given, in the case of floating screeds, if there is no connection between the floating screed and the surrounding walls, not even, as is often the case in practice, via sound bridges by way of permanently elastic jointings. The above invention is based on these findings, said invention providing screed border strips or profiles which are either designed as T-profiles, in two shells, or as T-profiles with a soft bearing means or, as foldable sheeting, are bent and/or adhesively bonded to form the T-profile configuration, with the possibility of being attached self-adhesively on site, and/or for previous or subsequent installation on floating screeds.

Method for manufacturing a plaster false floor.

Abstract: of EP0300135Known mould elements have a level mould board and a multiplicity of feet arranged on the underside of the mould board. With stable mould elements, there is the problem that, depending on the nature of the bare floor, not all the feet stand on the bare floor. After its completion, the false floor is then hollow at these points and is thus less able to bear loads. With other mould elements, use is made of a relatively thin foil which is filled with fluid screed. However, it is not possible to walk on the foil when pouring the screed. To overcome these disadvantages, a mould element is proposed on the underside of which three feet are attached in a triangle-like arrangement. The false floor is produced by laying a multiplicity of such mould elements, to which a screed is applied. This ensures that all the feet of the false floor stand on the bare floor. The mould elements are used in the retrospective construction of false floors, in particular for floor installations.

Fluid mixture finisher

Abstract: PURPOSE:To prevent the thermal deformation and damage of a screed even if it is heated by dividing a screed device into more than one in the direction of the width of a car and loading them separately against screed frames so that they are capable of elevating. CONSTITUTION:An asphalt finisher is constituted of a spreader of a puddle to spread a fluid mixture of asphalt and others and a screed device to roll the spread fluid mixture, which are provided to the rear of a running car 1. The screed device is divided into more than one in the direction of the width of the car, and each of the divided screeds 33a-33f are hung against screed frames respectively by screed level controllers 31 consisting of screw mechanism as elevation mechanism. The thermal expansion takes place in the divided screeds, and even if the divided screeds displaces in the direction of the width of the car, the displacement can be absorbed by an idle portion of the screw mechanism. Accordingly, the occurrence of excessive thermal stress in each section can be suppressed, so that the thermal deformation or damages of the divided screeds can be prevented.

Heat-conductive embedding mix. - esp. for embedding heating system or solar collector elements

Abstract: (A) In a screed, mortar or concrete mix with binders (e.g. based on cement, gypsum, resin or asphalt) and fillers (e.g. sand, gravel or chippings), esp. for embedding heat transport elements of floor, wall or ceiling heating systems or solar heat collectors, the novelty comprises addn. of small heat conductive bodies of silicon contg. 0.5-40 (pref. 3-30, esp. 5-15)% iron. (B) Also claimed are floor, wall or ceiling coatings or panels for a surface heating system, produced from the mix (A). ADVANTAGE - The mix has much improved thermal conductivity with slightly reduced heat capacity and is produced at only slightly increased cost compared with conventional mixes.

Process for producing a cavity floor provided with supply lines, and cavity floor

Abstract: There is a process in which there are laid, on a subfloor 5, sheeting webs 6 which delimit ducts 13 by mutually parallel bulges 11, in which screed which is left to harden is applied onto the sheeting webs 6, and in which whereafter the supply line 14 is pushed into one of the ducts 13. In this arrangement, it is desirable for it to be easier to push the supply line into the respective duct. This is achieved in that use is made of sheeting webs 6 which are folded, in the manner of an accordion, to form bulges 12 with continuous walls, in that, at the free ends 16 of the ducts 13 of one of the sheeting webs 6, a channel running transversely with respect to the ducts is produced, in that, for the application of the screed in front of the free ends 16 of the ducts 13, there is inserted an insertion bar 18 which is removed once the screed has hardened, and in that, once the supply line 14 has been pushed in through the channel 17, said channel is concealed by a panel strip. As a result of the continuously smooth duct walls and of the transversely running channel, the supply line can be pushed in without any difficulty.

Improved screeding apparatus and method

Abstract: An apparatus (10) and method for pivoting a screed assembly (450) during screeding of uncured concrete to maintain proper screeding contact by the screeding assembly by counteracting the force of concrete acting against the screed assembly as it is moved along the concrete. The apparatus includes a self-propelled support (12), a boom (170) and boom mount (172), and a pivot between the boom and the screed assembly. The axis of the pivot extends generally perpendicular to the screeding direction in which the screed assembly is moved. A power source, such as a pair of fluid cylinders, rotates the screed (472) about the pivot axis, preferably in response to an electro-hydraulic leveling sensor mounted on the screed. The lateral incline of the screed perpendicular to the screeding direction may be controlled about additional pivot axes orthogonal to the first. A power operated elevation control is responsive to a fixed laser beam reference plane positioned externally of the screed assembly. The boom is telescoping and has multiple sections (220,250) for extending and retracting the screeding assembly with respect to the support. The screed preferably includes a vibration assembly (484,492) vibrationally isolated (by 478) from the remainder of the screed for smoothing the concrete.

Finisher for asphalt

Abstract: PURPOSE:To enable pavement construction along a pavement boundary surface having an angle in the direction of pavement by fixing an expanding and contracting arm to the rear section of an asphalt finisher and rotatably installing a screed at the nose of the arm CONSTITUTION:Screed arms 6R, 6L expanded and contracted by hydraulic cylinders 8R, 8L are fastened to the rear section of an asphalt finisher while arcuate guide members 10R, 10L, internal side faces of which have guide grooves 11R, 11L and internal gears 12R, 12L, are mounted respectively at the noses of the arms Screed holding struts 14R, 14L disposed in upright on the top face of a screed 5 are coupled with the arms 6, and the screed 5 can be rolled by a motor set up to the upper sections of the struts 14R, 14L