Abstract: A vibratory concrete finishing tool includes an elongated handle formed with a cylindrical configuration having an uppermost end and a lowermost end. A concrete working device has a planar bottom surface adapted to engage a wet concrete surface, and a receiver for removably receiving the lowermost end of the handle. A clamping and vibration transmitting arrangement is coupled externally to the lowermost end of the handle. An engine-driven vibratory mechanism is fixed to the clamping and vibration transmitting arrangement so that the vibratory mechanism is held in spaced relationship with the handle. The vibratory mechanism has a spinning crankshaft assembly with an eccentric weight mounted thereon.

Abstract: A screeding apparatus for screeding and smoothing an uncured concrete surface includes a vibrating member and a grade setting device adjustably mounted to said vibrating member. The screeding apparatus may include a wheeled support which at least partially supports the vibrating member and/or the grade setting device. The grade setting device is vertically adjustable, such as via a laser plane responsive control system, to set or indicate the desired grade of the concrete surface as the screeding apparatus is moved over and through the uncured concrete. The level of the screeding apparatus may be automatically adjustable to maintain a desired level and angle of attack of the vibrating member. The vibrating member may be activated only when the screeding apparatus is moved in a screeding direction so as to reduce depressions that otherwise may occur if the vibrating member vibrates on the uncured concrete when not moving.

Abstract: A vibratory power unit (10, 210) having small gasoline engine (12) coupled by a drive shaft (15) extending through a semi-rigid shaft case (16, 18, 20) to an eccentric (75) rotating with the aid of sealed bearings (74, 78) within a vibrator case (14, 514) is disclosed. The semi-rigid shaft case includes a first rigid shaft case portion (16) and a second rigid shaft case portion (20) coupled together by an isolator (18, 518, 618). A coupling (90, 790) is provided for removably coupling the vibratory power unit (10, 210) to concrete finishing tools (11, 211). The coupling includes a split ball (92) configured to be received on the vibrator case (14, 514) and a slit ring (110) configured to compress the split ball (92) onto the vibrator case (14, 514). A radio controlled throttle controller (300, 400, 500) is provided for remotely controlling the speed of engine (12). Radio controlled throttle controller (300, 400) scavenges electrical power from the magneto circuitry of the engine (12).

Abstract: A portable vibratory screed machine is provided with a vibration restraint operable to reduce undesirable vibration of the engine and to extend the life of the engine. The portable vibratory screed machine includes a machine frame having a reference structure. The machine further includes an engine mounted on the reference structure via a mount that surrounds a drive shaft that is driven by the engine's output. A vibratory assembly remotely located from the engine is powered by the engine to vibrate a screed plate. The vibration restraint directly couples the engine housing to the reference structure at a location that is spaced apart from the mount.

Abstract: A soft landing control system for a screeding device is operable to automatically lower a vibrating member of a screed head assembly into engagement with a concrete surface at a time and place where the vibrating member is not positioned over an overlap area of already screeded concrete. The vibrating member is automatically lowered onto newly placed concrete at or near the junction or cold-joint between the already screeded concrete and the area of newly placed concrete, so as to avoid depressions in the already placed concrete. Optionally, the soft landing control system may include a timing device and may lower the vibrating member after a period of time following an activating event. Optionally, the control system may detect when the vibrating device is positioned at or near the newly placed concrete and may lower the vibrating member in response to such detection.

Abstract: A vibratory concrete screed includes a vibration isolation system that minimizes the transmission of vibrations to the operator under normal operating conditions, but becomes more rigid during screed control forces applied to the blade through the isolation system when the operator applies greater forces to the operator handle. The system includes low durometer elastomer vibration isolators isolating the operator handle from the vibration exciter and screed blade in a manner that limits vertical compressive movement of the isolators, yet permits substantially greater horizontal shear movement to effectively isolate the operator from vibration. The isolator mounting arrangement also includes retainers that engage the isolator to limit the amplitude of horizontal shear movement when the operator applies a greater control force to the operator handle.

Abstract: A screed plate includes a pair of handles mounted to a pivot member. The pivot member is connected for rotation with respect to a screed plate about a horizontal axis with respect to a screed plate. The vibrator is provided on the screed plate and a tilt actuator is connected to the pivot member and to the screed plate for causing tilting of the screed plate. A laser receiver receives a horizontal laser beam and determines whether or not the receiver is above, below, or at the same level as the laser beam. If the receiver is either above or below the laser beam it sends a signal to the tilt actuator to cause tilting of the screed plate.

Abstract: A lightweight screeding apparatus for screeding and smoothing an uncured concrete surface includes a concrete surface working member, such as vibrating beam or member, and a grade setting device adjustably mounted to said vibrating beam. The screeding apparatus may include a wheeled support which at least partially supports the vibrating beam and/or the grade setting device. The wheels of the wheeled support may be powered or driven to assist an operator in moving the screeding apparatus over and through the uncured concrete. The grade setting device is vertically adjustable to set or indicate the desired grade of the concrete surface as the screeding apparatus is moved over and through the uncured concrete. The grade setting device may be adjusted by means of a laser plane responsive control system.

Abstract: A lightweight screeding apparatus for screeding and smoothing an uncured concrete surface includes a concrete surface working member, such as vibrating beam or member, and a grade setting device adjustably mounted to said vibrating beam. The screeding apparatus may include a wheeled support which at least partially supports the vibrating beam and/or the grade setting device. The wheels of the wheeled support may be powered or driven to assist an operator in moving the screeding apparatus over and through the uncured concrete. The grade setting device is vertically adjustable to set or indicate the desired grade of the concrete surface as the screeding apparatus is moved over and through the uncured concrete. The grade setting device may be adjusted by means of a laser plane responsive control system.

Abstract: A screed with a trussed beam having a cross-section in the geometrical shape of an equilateral triangle used to support tools for working plastic concrete. The beam is supported between spaced apart, wheeled carriages riding forms bounding the plastic concrete. The beam is oriented such that the cross-sectional triangle is inverted with the wide base at the screed top and the apex at the bottom. The inverted triangular truss beam has sufficient space to suspend working tools substantially within the peripheral edges of the beam. The screed uses upstanding integral outriggers so that the pitch at the center of the screed can be adjusted exteriorly to the pour site. A rotary spreader displaces concrete forwardly without deleteriously compressing it as the screed moves forwardly.

Abstract: This invention relates to a vibrating screed for compacting and smoothing flowable cementitious materials. More specifically, this invention relates to a self-contained hydraulic powered concrete screed. This hydraulic screed consists of a relatively lightweight screed unit having a hydraulic powered vibrator and a portable hydraulic power pack that is mounted on a back pack wearable by the operator. The handle of the screed unit is isolated from the hydraulic vibrator and screed blade by three rubber isolation mounts. The working height of the handle can be adjusted by a turnbuckle assembly at one of the rubber mounts, causing the handle to pivot about the other two the rubber mounts. The hydraulic power pack comprises an internal combustion engine driving a hydraulic pump that provides pressurized hydraulic fluid to the vibrator unit via flexible hoses.

Abstract: A vibration exciter for a ground compacting devices such as a vibratory plate comprises unbalanced shafts which are arranged parallel or coaxial to one another, which can be driven in counter-rotation with the same rotational speed, and which each carry at least one centrifugal weight, whereby the phase position of the centrifugal weights can be adjusted by a phase adjusting device in such a manner that the vertical components of the centrifugal forces generated by the centrifugal weights are cancelled out in each rotational position. At the same time, the horizontal components of the centrifugal forces are correspondingly added in the same direction. This phase position prevents the vibratory plate, when stationary, from introducing any vertical vibration into the ground to be compacted, but enables it to introduce shear stresses via a ground contact plate into the ground, preferably an asphalt surface, in order to compact cracks and pores.

Abstract: An apparatus that tamps paving material and distributes the paving material evenly across a screed plate before the paving material is leveled by the screed plate. The apparatus includes a tamper bar for compacting material, a drive connected to the tamper bar, and a biasing member. The drive intermittently forces the tamper bar downward into contact with the paving material at a desired speed and to a desired depth. The biasing member is connected to the tamper bar and biases the tamper bar upward against the drive such that the biasing member raises the tamper bar out of contact with the paving surface after the drive forces the tamper bar downward.

Abstract: A lightweight screeding apparatus for screeding and smoothing an uncured concrete surface includes a concrete surface working member, such as vibrating beam or member, and a grade setting device adjustably mounted to said vibrating beam. The screeding apparatus may include a wheeled support which at least partially supports the vibrating beam and/or the grade setting device. The wheels of the wheeled support may be powered or driven to assist an operator in moving the screeding apparatus over and through the uncured concrete. The grade setting device is vertically adjustable to set or indicate the desired grade of the concrete surface as the screeding apparatus is moved over and through the uncured concrete. The grade setting device may be adjusted by means of a laser plane responsive control system.

Abstract: A truss screed includes a shaft guard that covers the screed's exciter shaft to protect it from concrete and debris and that protects the surroundings from the rotating exciter shaft. The shaft guard includes a plurality of tubing sections that surround the shaft and that are supported on joints disposed between the guard sections. In a first preferred embodiment of the shaft guard, each joint includes a resilient spring ring, a support cup that receives the spring ring and an end of an associated tubular section, and a bearing that engages the support cup and that supports the joint and a portion of the exciter shaft on the screed's frame. In a second preferred embodiment, each joint includes a support cup that supports an end of the associated tubular section, a bearing, and a U-shaped bracket that couples the support cup to the bearing. The bearing and/or the bracket have elongated slots therethrough for accommodating misalignment of joint components.

Abstract: This invention relates to a vibrating screed for compacting and smoothing flowable cementitious materials. More specifically, this invention relates to a self-contained hydraulic powered concrete screed. This hydraulic screed consists of a relatively lightweight screed unit having a hydraulic powered vibrator and a portable hydraulic power pack that is mounted on a back pack wearable by the operator. The handle of the screed unit is isolated from the hydraulic vibrator and screed blade by three rubber isolation mounts. The working height of the handle can be adjusted by a turnbuckle assembly at one of the rubber mounts, causing the handle to pivot about the other two the rubber mounts. The hydraulic power pack comprises an internal combustion engine driving a hydraulic pump that provides pressurized hydraulic fluid to the vibrator unit via flexible hoses.

Abstract: A screed device includes a screed plate having two arms separately attached at their lower ends to the screed plate. The arms are pivotally attached to the screed plate for pivotal movement about both a vertical axis and a horizontal axis.

Abstract: The finding produces a self-propelled vibratory finishing machine for asphalting road surfaces comprising a frame which supports a storage device and distribution of the bitumen to be deposited on the surfaces comprising a pair of screw feeders moved by a transmission unit and a pressing device the deposited bitumen aggregate set behind the screw feeders. Connected to the transmission unit and next to the screw feeders there is a flow divider device having surfaces symmetrically shaped to create at least one cutting edge suited to aid the flow of bitumen towards the screw feeders.

Abstract: A vibrating screed for processing a floor layer, more particularly a so-called vibrating beam, of the type including a vibrating board (2), a vibrating mechanism (3) cooperating with the vibrating board, and a handle (4) whereby the vibrating mechanism comprises an eccentric (7) seated in bearings (5-6) and a motor (8) for driving the eccentric, wherein the bearings and the eccentric are fixed in a split body by means of a clamping mechanism on the split body.

Abstract: A powered inertia propelled screed for leveling, smoothing and spreading concrete having a power source, motor pulley, motor belt, power reduction pulley, power reduction belt, transfer axle, second power reduction pulley, continuous belt, irregular shaped pulley, arm, stationary bracket, platform, wheels, tracks, control arms and screed. The rotation of the irregular shaped pulley causes the powered inertia propelled screed to move back and forth along the tracks by inertia and so that the screed is moved back and forth along the concrete.

Abstract: A vibrating device for processing a floor layer. The device includes a vibrating board, a vibrating mechanism and a handle. The handle is attached to the vibration board with at least one clamping coupling. The clamping coupling includes at least two connecting elements, each having conical parts wherein one of the conical parts is adapted to fit within another of the conical parts. The clamping coupling further includes a tensioning device that is arranged to axially tighten the conical parts against each other.

Abstract: A trowel blade assembly for use with a rotary surfacing machine with the assembly consisting of a relatively thick, inflexible trowel blade and a relatively thin, flexible finish blade, wherein the latter is secured with respect to the former such that when in operation on a substantially horizontal working surface, with the blade assembly selectively rotated about a horizontal axis, the finish blade is continuously in contact with the working surface regardless of the consequent variable degrees of tilting of the trowel blade with respect to the working surface.

Abstract: A powered inertia propelled screed for leveling, smoothing and spreading concrete having a power source, motor pulley, motor belt, power reduction pulley, power reduction belt, transfer axle, second power reduction pulley, continuous belt, irregular shaped pulley, arm, stationary bracket, platform, wheels, tracks, control arms and screed whereby the rotation of the irregular shaped pulley causes the powered inertia propelled screed to move back and forth along the tracks by inertia and wherein the screed is moved back and forth along the concrete.

Abstract: A vibratory screed device for levelling freshly poured concrete surfaces consists of an elongated vibrated screed beam delimited by a flat underside, a first and a second longitudinal side and a top; of a vibratory assembly for bringing the vibrated screed beam into vibration; and of a handle assembly which can be fixed in a detachable manner to the vibrated screed beam at an upward slope with respect to the flat underside. The first and the second longitudinal side are differently profiled and each has a surface suitable for vibratory levelling. The handle assembly can be fixed to the vibrated screed beam in two positions, in the one position sloping upwards obliquely at the first longitudinal side in order to make the first longitudinal side the active surface and in the second position sloping upwards obliquely at the second longitudinal side in order to make the second longitudinal side the active surface.

Abstract: A vibrating screed with rollers for use in leveling a concrete pour. The screed comprises an elongate screed member defining opposed first and second ends and extensible between a pair of screed rails. A first and second roller are rotatably mounted to the screed member and protrude from respective ones of the first and second ends thereof. The rollers are rotatably movable along respective ones of the first and second screed rails. The screed additionally may comprise a motor to rotate the rollers and/or vibrate the screed member.

Abstract: The screed includes an elongated blade vibrated by a centrally located, eccentric weight. The blade is supported by an elongated shaft extending to a power source that drives the weight. An associated operator handle facilitates convenient manipulation of the screed. A unique vibration dispersion system enables the centrally located weight to effectively vibrate the entire blade length. The dispersion system includes an elongated, rigid integral brace extending the entire blade length. The brace secures to the eccentric weight via a vibratory housing. Vibrations from the housing force the blade to vibrate violently to consolidate the plastic concrete. As the screed is drawn across wet plastic concrete, it simultaneously consolidates the concrete by vibrating it thoroughly throughout the monolith while also striking off and levelling the top layer of the concrete.

Abstract: An earth compacting machine for attachment to the lift arms of a front loader tractor or skid steer loader, the lift arms having forward implement attachment ends, the lift arms having bucket rams providing pivotal motion of implements attached thereto, the earth compacting machine consisting of an earth compacting plate having an upwardly chamfered forward end, an attachment plate fixedly attached to and extending upwardly from the earth compacting plate, the attachment plate being adapted for attachment to the forward implement attachment ends of such lift arms of such front loader tractor or skid steer loader; and an imbalanced wheel vibrator fixedly attached to the upper surface of the earth compacting plate; the earth compacting plate further comprising a dirt grading blade section fixedly attached to the chamfered section of the earth compacting plate, the dirt grading blade section being positioned for dirt grading through actuation of the bucket rams.

Abstract: A concrete finishing tool comprising an elongated handle in a cylindrical configuration having an upper portion and a lower portion and an intermediate portion there between, the upper portion having a lower end and an upper end with the upper portion containing a battery, the lower portion having a lower end with a horizontal aperture there through and an upper end, the intermediate portion having a lower end and an upper end with the intermediate portion containing a switch with a receiver adjacent to its upper end and an axially reciprocating vibrator adjacent to its lower end and with a motor there between; and a cross piece with lateral ends and with a planar lower surface adapted to finish concrete and an upper surface with a central bracket formed with a horizontal aperture there through and with a pin pivotally coupling the bracket to the lower end of the handle, the upper surface also including a pair of vibrators adjacent to the lateral ends thereof.

Abstract: A screeding assembly and method is disclosed for spreading, grading, consolidating and smoothing loose or plastic material such as poured, uncured concrete when the assembly moved over an area of the material. The assembly includes a rotatable auger to move the material laterally across the path of travel, a vibratory screed positioned behind the auger to smooth and finish the material, and an elongated engaging member reciprocated laterally across the path at a position between the auger and vibratory screed to facilitate consolidation of the material. Preferably, a plow/striker is positioned in front of the auger to and remove excess material. The assembly may be mounted on a self-propelled vehicle or other support on a boom for moving the assembly over the material, and is preferably controlled by a laser beam responsive elevation control. A kit for attaching the reciprocating engaging member to an existing screed assembly is also provided.

Abstract: A vibrating screed is provided which permits selective adjustment of the angle between the axis of a rotatable eccentric and the plane defined by the bottom of the screed plate to vary the relative vertical compaction and horizontal smoothing oscillation movement imparted by the eccentric. The screed includes a frame, motor, an eccentric driven by the motor, a screed plate, and a pair of locking hinges which releasably connect the frame to the screed plate at one of a multiplicity of possible angular relationships therebetween. The screed plate includes a tension adjustment to facilitate leveling of the screed and the weight of the eccentric is positioned between two spaced-apart bearings for enhanced support and for enabling the axis of rotation of the eccentric to be varied relative to the screed plate.

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.

Abstract: A screed assembly is disclosed for an asphalt paving machine that is used to pave the surface of a roadway with asphalt concrete paving material. This screed assembly includes a frame portion that is adapted for attachment to the paving machine, and a vibratory screed portion that is adapted for attachment to the frame portion. The vibratory screed portion includes a screed plate that is disposed towards the surface of the roadway, and a vibratory assembly which is mounted to the screed plate so as to impart vibration thereto. This vibratory assembly includes an elongate shaft, means for rotating the shaft, and an eccentric weight that is mounted on the shaft, which weight has a non-symmetrical distribution of mass about the shaft so that vibration will be created upon rotation thereof. The screed assembly also includes means for isolating the vibratory assembly so as to limit the transmission of vibration created thereby to the frame portion.

Abstract: A portable vibratory concrete screed is disclosed. The concrete screed includes a screed blade including a flat bottom wall extending between a front edge of the screed blade and a rear edge of the screed blade. The screed also includes a vibratory assembly, with an eccentric weight, coupled to the screed blade, wherein the eccentric weight rotates in a plane which is oblique to the bottom wall of the screed blade. Finally, the screed includes a handle assembly extending from the vibratory assembly and coupling a motor to the vibratory assembly to drive the eccentric weight and vibrate the screed blade.

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.

Abstract: An improved cement finishing hand tool having a handle member with a gripper shaft, a proximal end and a distal end, the distal end being substantially downwardly angled so as to be removably engaged with an upper surface of a removable blade member. The removable blade member is interchangeably secured to the handle member which is structured to independently vibrate resulting in the translation of the vibration from the handle member through the blade member. This vibration facilitates the production of a corresponding desired finish as the lower surface of the blade member is passed over wet cement during the initial and final stage finishing procedures.

Abstract: An extremely light-weight, portable floating power vibratory concrete "Wet Screed", which is hand operated by a single finisher in order to strike off, tamp and smooth freshly poured concrete using only perimeter slab forms or curbs. The unique angular design of the enclosed hollow screed blade allows the operator to lower the handle and effectively use the rear 60 degree angled surface of the screed blade to cut down the height of the concrete to the desired grade, or raise the handle to effectively use the front 60 degree angled surface of the screed blade to float and maintain the desired grade. The flat aluminum bottom extending from the front angled surface to the rear angled surface of the screed blade functions to produce a smooth, near final finish while the vibratory action tamps the rock down and works the fat to the concrete surface, thereby substantially increasing the finishing time while making the finisher's job much easier.

Abstract: A concrete finishing tool that quickly changes in length to selectively bypass columns, curbs and other obstacles during concrete finishing includes a unique foldable bypass system at an extremity that can be folded between extended and retracted positions. When actively deployed the bypass is aligned for finishing concrete. In the retracted position it assumes a clearance orientation out of contact with the concrete. The bypass comprises a finishing wing for contacting concrete, a linkage system and a vibrator. The wing may comprise a forward strike-off and a trailing float. The linkage system comprises a pair of abutting links interconnected at an axially offset intermediate pivot point. One of the links is pivotally attached to the tool and the other link is pivotally attached to the wing. When the linkage system folds the links are moved between length additive and length subtractive orientations.

Abstract: The invention relates to a vibratory packing plank for a road finisher, having a vibration unit, which comprises a vibration element exhibiting a large-area base plate and coupled to a vibration drive, and a guide plate positioned obliquely towards the base plate, a vibration strip being disposed between the guide plate and the base plate of the vibration unit, which vibration strip is coupled to the vibration drive and provided with a run-in slope.

Abstract: A winch assembly is connected to each end of a vibratory concrete screed to move the screed across a concrete slab to be finished. Each winch assembly includes a rotatable drum with a cable wound on the drum. The free end of each cable is connected to a fixed object mounted along the side of the concrete slab. To wind the cable on the drum and move the screed along the slab, the eccentric drive shaft of the screed is connected through a variable speed belt drive to the respective drum. Each belt drive includes an adjusting mechanism for varying the effective diameter of a belt drive pulley, thus providing a variation in speed. Each winch assembly also includes an eccentric gear speed reducing mechanism, which is connected between the belt drive and the drum to further reduce the output speed to the cable drum.

Abstract: An automatic grading control device for finishing plastic concrete controls several different elongated, multi-section concrete finishing tools such as vibratory screeds or the like, with or without forms. Supporting skis facilitate sliding, winch driven movement of the device relative to the plastic concrete. Spaced apart and vertically upwardly extending towers are supported by the skis and disposed periodically along the length of the finishing tool. Each tower comprises a pair of elongated, spaced apart stanchions disposed on opposite sides of the tool that are braced with a rigid, adjustable upper strut. The strut extends between the stanchions and forms the top of the tower. Movable sleeves coaxially fitted to the stanchions are synchronized by rigid transverse bridges that extend between the sleeves above the tool. Hydraulic or pneumatic cylinders extending between the strut and the bridge raise and lower the tool thereby controlling level.

Abstract: A float plate includes vibratory members secured in operative relationship thereto to effect vibration of the float during a concrete finishing procedure. A modification of the invention includes the apparatus to have fluid dispersion structure to enhance ease of a finishing of an underlying concrete pad. Illumination members are optionally provided for the use of the organization during periods of limited available light.

Abstract: A self-propelled screeding apparatus for uncured concrete or the like includes a frame, propulsion means for the frame, a telescoping boom including at least one longitudinally slidable member and hydraulic means to move the latter with respect to the frame, and a screeding device mounted on the boom which includes a vibratory double plate providing two spaced-apart, substantially co-planar flanges for contacting material being screeded.

Abstract: A tow point for an asphalt paver, which allows the operator to: (1) select either a fixed or sliding tow point connection; and (2) select from among several possible locations of each, thereby adjusting the distance between the screed and transverse auger of the paver. Combination of these features in a single machine makes it possible to lay down an asphalt mat of uniformly desired thickness, while optimizing use of the aggregate batch particles.

Abstract: A portable screed for smoothing and leveling an area of freshly poured concrete. The screed includes a cylindrical, horizontal smoothing roller secured to the screed plate for the screed, the roller being substantially coextensive with the screed plate. The roller is mounted immediately adjacent the screed so that the roller first encounters and smooths concrete before the screed plate passes over the concrete. The roller is adjustable to control its working of the concrete, and rotates about its axis in a direction opposite to the direction of travel of the screed for proper smoothing of the 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.

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.

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.

Abstract: An apparatus and method are disclosed for pivoting a screed assembly during screeding of placed and/or poured, uncured concrete or like loose, spreadable materials to maintain proper screeding contact by the screeding assembly with the concrete or like material by counteracting the force of concrete or other like material acting against the screed assembly as it is moved along the concrete. The apparatus includes a support, preferably of the self-propelled type, a boom and boom mount, and a pivot between the boom and the screed assembly. The axis of the pivot extends generally perpendicularly to the screeding direction in which the screed sassmblyis moved. A power source, such as a pair of fluid cylinders, rotates the screed 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.

Abstract: A concrete finishing float for finishing wet concrete consists of a long, detachable handle assembly which is attached to a float by means of an incline adjusting mechanism. This mechanism allows the user from a remote location by the use of a long handled shaft to alter the incline of the float in relation to the handle assembly while the float is in use by axially rotating the handle assembly. The incline adjusting mechanism includes a rod which connects the handle receiving member to the float. Axial rotation of the handle causes the rod to move the float relative to the handle.

Abstract: A distributor frontally mountable on a screed to minimize or eliminate the manual distribution and leveling of freshly poured concrete which is otherwise required prior to screeding. The distributor comprises a rotatable body bearing an array of circumferentially and axially staggered plate elements. The plate elements may be swept back and are staggered so that only selected ones of the plate elements in the array are in contact with the wet concrete at any point in time of operation, with the direction of travel of the plate elements being toward the screed in the upper quadrants of rotation of the rotatable body, and away from the screed in the lower quadrants of rotation.