Abstract: A crane includes a base structure; a slew bearing; a crane housing; a boom moveably mounted to the crane housing to be pivotable about a horizontal first pivot axis; three main hoisting systems; and a luffing system. The boom includes an A-frame with two boom legs that are connected at one end to the crane housing and at the opposite end to each other. Each main hoisting system includes a hoisting cable; a sheave block; a hoisting block; and a hoisting winch. The sheave block of each main hoisting system is pivotable about a horizontal second pivot axis that is perpendicular to the sheave rotation axis. The sheave blocks of the three main hoisting systems are arranged side-by-side. The luffing system includes two luffing winches; and two luffing cables extending between the respective two luffing winches. The luffing cables are connected to respective outriggers of the hammerhead structure.

Abstract: A construction beam robot, such as for steel erection, comprises a pair of thrust producing fans located at either end of a beam to be installed. The fans' thrust and direction of thrust is controlled and/or coordinated by a computer with custom control software. By altering the direction and amount of thrust, the orientation of the beam is controlled. Workers on site who possess a controller are able to rotate or fix the orientation of a beam from a distance and do so wirelessly.

Abstract: A low-construction hoist for a wire rope hoist is arranged to move along a lower flange of a horizontal beam or rail.

Abstract: Provided is a crane assembling method which can easily assemble a crane. In the crane assembling method, a step of connecting an (n+1)th partial jib includes the steps of: placing a distal end of an nth partial jib connected to a boom on a pedestal on the ground; connecting an upper side connector on a proximal end of the (n+1)th partial jib to an upper side connector on the distal end of the nth partial jib in a state where the (n+1)th partial jib is lifted; mounting a wheel on the lower side connector on a distal end of the (n+1)th partial jib; and connecting a lower side connector of the nth partial jib and a lower side connector on a proximal end of the (n+1)th partial jib to each other by lifting the nth partial jib.

Abstract: A crane load centering assembly includes a crane that has a boom, a sheave that is rotatably coupled to the boom and a load block. A transmitting unit is coupled to the sheave having the transmitting unit being directed downwardly from the sheave. The transmitting unit transmits an alignment signal along a line that is vertically oriented. In this way the alignment signal can travel in the direction of the force of gravity with respect to the boom. A plurality of sensors is provided and each of the sensors is coupled to the load block such that each of the sensors is positioned below and is aligned with the transmitting unit. One of the sensors receives the alignment signal when the crane lifts a load and the load deflects from beneath the sheave. A plurality of light emitters is provided and each of the light emitters is coupled to the load block.

Abstract: A double jib stewing pedestal crane includes a main jib, a secondary jib, and a secondary jib positioning device to support and position the secondary jib with respect to the main jib and actuate the pivotal movement of the secondary jib. The secondary jib positioning device includes a secondary jib positioning cable, a spoke structure fixed to the secondary jib and extending radially outward, and a tension chain connected at one end to the secondary jib positioning cable and at the other end to the secondary jib and/or to the spoke structure. The spoke structure is adapted to support the tension chain.

Abstract: A method of operating a chain drive that includes sprockets. Tensile chain moments on the sprockets are determined and a specification value for operating the chain drive is determined therefrom in an automated manner. A corresponding assembly has a chain drive with sprockets and with a control device at least partly associated with the chain drive. The control device is configured for carrying out the method and a specification value for load distribution among the two drives for operating the chain drive is determined therefrom in an automated manner.

Abstract: The disclosure relates to a sliding system for a wraparound transmission for reducing vibrations and undulations of a wraparound means, the sliding system comprising a wraparound means for connecting a transmission input shaft to a transmission output shaft in a torque-transmitting manner. The wraparound means has a plurality of deflecting axes and a height oriented transversely with respect to the deflecting axes. The sliding system also includes a sliding rail which comprises a sliding channel with an inner sliding face and an outer sliding face, wherein the sliding channel defines a running direction for the wraparound means, and the sliding channel being divided in the running direction into an entry section, a main section and an exit section. The sliding channel has a setpoint height adapted to the height of the wraparound means.

Abstract: Provided is a lattice boom in which a desired part can be reinforced after the lattice boom has been assembled and in which workability of the reinforcement can be improved. The lattice boom includes a plurality of main pipes, a plurality of lattice pipes, and a reinforcing part. The reinforcing part is provided on at least one of the outer circumferential surface of the main pipe and the outer circumferential surface of the lattice pipe. The reinforcing part is arranged between adjacent connecting parts among a plurality of connecting parts each connecting the main pipe and the lattice pipe. The reinforcing part includes a plurality of reinforcing members arranged along the circumferential direction of the pipe.

Abstract: A chain assembly includes interconnected chain units each having two rollers, two bushings disposed through the rollers, two inner plates rotationally disposed on the bushings, and two pins penetrating the bushings and the inner plates. Two outer plates are rotationally fixed to respective pins between adjacent inner plates. Each inner plate has two inner pin holes, two rims projecting from one surface of the inner plate, and a contact area formed around the rims. Each outer plate has two outer pin holes, two accommodation portions protruding from one surface of the outer plate to provide two rooms formed into opposing surface thereof, and a positioning area formed around the rooms for fitting snugly with adjacent contact areas when the respective rims are completely covered by the rooms. Therefore, the structure strength is increased, the transmission is stable and smooth, and no entry and accumulation of dust is incurred.

Abstract: An upper turning body mounted on a lower body for a crane includes a turning frame mounted on the lower body to turn freely and a boom provided to the turning frame to be raised and lowered freely. The turning frame includes a pair of attachment brackets to which a base end section of the boom is attached such that the boom is free to be raised and lowered, and a main frame to which the pair of attachment brackets are provided with an interval in the left-right direction of the upper turning body. The dimension of the main frame in the front-rear direction of the upper turning body orthogonal to the left-right direction is smaller than the dimension of the main frame in the left-right direction.

Abstract: The present disclosure relates to a mobile crane having an undercarriage and a superstructure rotatable about an axis of rotation with respect to the undercarriage and having a ballast mounting apparatus couplable to the superstructure. The present disclosure is furthermore directed to a corresponding ballast mounting apparatus.

Abstract: The invention relates to a hydraulically telescopic support device for a vehicle, in particular for a mobile loading crane, comprising a hydraulically movable piston-cylinder unit for extending and retracting the support device and a hydraulic system comprising a first hydraulic circuit for moving the piston-cylinder unit and a hydraulic force measuring device for determining a supporting force which acts on the support device, wherein the hydraulic force measuring device has a dedicated second hydraulic circuit that is independent from the first hydraulic circuit of the hydraulic system, at least during the determination of the supporting force.

Abstract: The present invention relates to a crane having a multiple-piece longitudinal structural part, in particular a tower or boom, whose pieces comprise corner arms or horizontal beams which can be placed next to one another and which can be releasably connected to one another by a mortise and tenon joint, wherein the mortise and tenon joint comprises a tongue which can be plugged into a tongue receiver and which can be fixed by means of at least one crossbar which can be inserted transversely to the plug-in direction of the tongue. In accordance with the invention, the crossbar of the mortise and tenon joint can be spread apart by a spreading device such that the pieces of the longitudinal structural part to be connected can be clamped to one another by spreading apart the crossbar.

Abstract: A boom section for the boom of a telescopic crane has a lower shell and an upper shell. The lower shell and the upper shell are welded to one another, and the weld seam extends between the lower shell and the upper shell angled in at least one region to at least one section edge of the boom section.

Abstract: A roller chain includes pins, bushings, rollers, inner plates and outer plates. Two bushings are connected to one another in each case by way of at least two inner plates to form a chain link. Two consecutive chain links are articulately connected to one another in each case by way of each bushing being seated on a pin projecting beyond both ends of the bushing. At least one combination, which consist of two mutually frictionally engaged components—the pin and bushing on the one hand, the bushing and roller on the other hand,—include one component consisting of austenitic stainless steel with an S-phase formed at least on the surface by way of nitriding at a temperature between about 400° C. and 500° C., and another component consisting of a stainless ferritic steel, which at least on the surface, is nitrided at a temperature between about 1000° C. and 1200° C.

Abstract: Methods and apparatus are provided for constructing refractory structures, e.g., glass furnace regenerator structures and/or glass furnace structures formed of refractory components, by positioning opposed pairs of vertically oriented base beams on respective opposite sides of the refractory structure and having a lower end rigidly attached to a foundation of the refractory structure and an upper end which extends vertically above the refractory structure, and attaching cross-support beams to respective ones of the base beams at the upper end thereof so as to latitudinally span the refractory structure. An overhead crane assembly may thus be supported by the cross-support beams.

Abstract: A sprocket module for a bicycle has at least two sprockets fixedly coupled one another. At least one first sprocket of the at least two sprockets comprises engagement portion to a freewheel body of a hub for a bicycle rear wheel. A second sprocket of the module lacks the engagement portion and is supported on the freewheel body through the aforementioned at least one first sprocket. The module allows strong and low-weight sprocket assemblies to be made.

Abstract: A hoisting crane includes a slew bearing. The slew bearing includes a top bearing ring, a bottom bearing ring, a first row of axial load rollers and a second row of axial load rollers, which rows of axial load rollers are provided between a corresponding top roller raceway and bottom roller raceway. The top bearing ring has a top wall which extends above the first row of axial load rollers and in which at least one top entry port is provided. Furthermore, the top roller raceway of the first row of axial load rollers includes a removable raceway segment releasable attached in the top entry port. The removable raceway segment can be removed to enable access via the top entry port to the first row of axial load rollers to remove axial load rollers in a substantially vertical direction.

Abstract: A paper product dispenser that includes a toilet paper spindle adapted to hold and dispense a toilet paper roll, at least one motor connected to the toilet paper spindle, a controller connected to the motor, and a thermopile sensor in communication with the controller, the thermopile sensor comprising a plurality of thermocouples that form a junction A and a junction B, wherein when the thermocouples sense thermal radiation, thermal gradient between junction A and junction B is created, the thermal gradient generating an electrical signal that the thermopile sensor sends to the controller.