Abstract: The invention relates to a collar bearing for a telescopic boom for the sliding support of two telescopic sections in the collar region of the outer telescopic section, wherein the collar bearing includes fixing means, whereby the collar bearing selectively is releasably connectable with the outer or inner telescopic section.

Abstract: The invention relates to a crane, in particular an overhead crane or gantry crane, having at least two crane girders that extend horizontally in a longitudinal direction. The crane is designed as trussed girders and each girder includes an upper run with a moveable crane trolley and lifting gear. Each crane girders is composed of two upper run profiles that are connected together via a running rail for the crane trolley. By way of such a design, particularly simple assembly of the crane girders or of the crane can be achieved. Therefore, commercially available, conventional structural steel can be used for the upper run, from which the upper run is produced in a simple manner in terms of manufacturing technology by simple connection to a corresponding running rail.

Abstract: Embodiments of the disclosure include a reel hoist interlock system for an overhead crane having one or more sensors disposed on a hook of the overhead crane. The sensors provide a signal indicative of whether the hook is secured to an object to be lifted by the overhead crane. The reel hoist interlock system also includes transmitters in communication with the sensors. The transmitters receive and transmit the signal provided by the sensors. The reel hoist interlock system further includes a controller configured to operate the overhead crane based on an input signal received from a remote and based on the signals received from the transmitters and indicators operated by the controller based on the signals received from at least one of the transmitters and the remote.

Abstract: The invention relates to a method of operating a crane having a luffable crane boom and having a trolley travelable at the crane boom, wherein the crane can be operated in a luffing mode, on the one hand, and in a trolley mode, on the other hand. In accordance with the invention, a switch is made between a luffing mode and a trolley mode by varying the hoist rope reeving. The invention further relates to such a crane for carrying out the method.

Abstract: A jib attachment/detachment mechanism to mount a jib on a boom head includes a guide mechanism including a guide roller and a guide support configured to guide engaging portions of a jib support to positions of engagement with shaft pins of a boom head when the jib support is pulled up with a wire by using a winch and to prevent change of a state of the wire pulled up by the winch when the jib support is rotated around the shaft pins by contracting a cylinder.

Abstract: The present invention relates to a lattice piece for a crane boom comprising at least two lattice piece parts which are separably connected to one another in the longitudinal direction by means of one or more releasable connection points, wherein one or more lattice piece parts have one or more longitudinal tubes at least sectionally in the region of the connection points.

Abstract: An improved knuckle boom crane apparatus provides a supportive base and a frame attached to the base, the frame including a cabin with an interior. A prime mover is supported upon the frame. A main boom is pivotally attached to the frame at a first boom end portion, the main boom having a second end portion. A jib boom is provided having first and second end portions, the jib boom first end portion being pivotally attached to the main boom second end portion, the jib boom second end portion being a free end portion. A main block is attached to the main boom and depending from the main boom second end portion. An auxiliary block is attached to the jib boom and depending from the jib boom second end portion. A main block parking area is provided next to the connection of main boom and jib boom that enables the main block to be parked when using the auxiliary block of the jib boom. The parking area enables the jib boom auxiliary block to lift a selected package without dismantling of the main block.

Abstract: The invention relates to a method of raising a telescopic boom of a mobile crane having a luffing fly jib and having a spatial boom guying. To be able to raise particularly long luffing fly jib systems together with the telescopic boom here, in accordance with the invention the telescopic boom is first telescoped outwardly to its desired length. In this position, all the telescopic sections are bolted to one another and the spatial guying is tensioned before the raising of the luffing fly jib pivotally connected to the telescopic boom.

Abstract: A telescopic boom includes a first frame having a curved portion whose section is substantially U-shaped, and a second frame connected to the first frame so that a closed section is formed. In the telescopic boom, the U-shaped curved portion of the first frame includes a plurality of protrusion portions formed at intervals in a circumferential direction of the telescopic boom, each protrusion portion extending in a longitudinal direction of the telescopic boom and being formed to have an arc-shaped section and protrude to the outside of the first frame.

Abstract: A hydraulically actuatable jib for a loading crane includes at least two jib extensions, the first jib extension being designed as an outer jib extension and the second jib extension being designed as an inner jib extension. At least two feed cylinders extend and react the at least two jib extensions. A hydraulic circuit for a working fluid includes a retraction line for retracting the feed cylinders in a pressurized manner, and the retraction line opens into the feed cylinder of the outer jib extension. A tank is provided for releasing the working fluid, and a control valve can be switched into an open position when the outer jib extension reaches a defined retraction position, particularly when the outer jib extension is substantially fully retracted. The valve thereby supplies the feed cylinder of the inner jib extension with pressurized working fluid.

Abstract: A control device using image tracking technology for controlling overhead crane system is disclosed, in which a plurality of image capturers are used to monitor a operating space and a position of the hoisted load, a respective image of two of which are used to establish a 3D coordinate data, so that an image processor calculates parameters including a hoisted load position (P), a swing angle (?) and a cable length (l) by referring to the images received, and generates a feedback signal to a crane controller. The crane controller issues a drive signal according to the feedback signal to drive the overhead crane system.

Abstract: Drive belt systems and methods thereof are disclosed. Drive belt systems and methods thereof include driving a continuous belt around a drive pulley member and an idler pulley member by the drive pulley member and transporting a transport unit and/or reciprocating carriage unit coupled to the continuous belt in a first direction away from the drive pulley member. Drive belt systems and methods thereof also include applying at least a force to the belt in a traverse direction thereto to direct a portion of the belt about the drive pulley member by a belt stretch management apparatus coupled to the transport unit and/or reciprocating carriage unit.

Abstract: A crane includes a crane pillar rotatably mounted about a vertical axis, at least one jib, connected to the crane pillar and pivotally mounted about a horizontal axis, at least one jib extension movably mounted in the jib, and at least one piston-cylinder unit for extending and retracting the jib extension relative to the jib. The first end of the piston-cylinder unit engages the jib via at least one first force-introducing region, and the second end engages the at least one jib extension via at least one second force-introducing region. The piston-cylinder unit has a central plane parallel to the horizontal axis about which the jib is pivotally mounted, and the piston-cylinder unit has a compressive deformation perpendicular to the central plane in a pressure-loaded state while the jib is being extended and a tensile deformation opposite the compressive deformation in a tension-loaded state while the jib is being retracted.

Abstract: For load compensation, different kinds of elastomeric load compensators are placed at various locations on the crane for increased flexibility and for shock and vibration absorption. The elastomeric load compensators employ elastomeric tension elements, elastomeric torsion elements, or elastomeric shear elements. Elastomeric tension elements can be simply inserted in series with the main hoist rope. An elastomeric load compensator employing elastomeric torsion elements is mounted to the underside of the boom for receiving the live end of the main hoist rope. A single stack of elastomeric shear elements is suitable for mounting a hoist or winch or an idler sheave to the crane structure. For additional load compensation, the hoist, winch, and idler sheaves are mounted on rails for increased displacements under heave loads, and the increased displacements are compensated by elongated elastomeric tension elements or multiple elastomeric tension, torsion or shear elements in series.

Abstract: The invention disclosed an apparatus for lifting and sliding a structure attached to the wall, comprising a lifting platform extending out over the building on the roof, and a synchronous lifting and sliding system which is arranged on the lifting platform; wherein the lifting platform comprises two platform beams extending out over the building, and a lifting beam placed on the platform beam; the synchronous lifting and sliding system comprises a hydraulic lifter arranged on the lifting beam, a hydraulic push instrument kit connected to the lifting beam, and a controller; A connecting rod is connected to one end of the hydraulic push instrument kit, and several installing holes are arranged at regular intervals on the connecting rod; The distance between the adjacent installing holes of the connecting rod matches with a stroke of the hydraulic push instrument kit; An installing ear-plate is provided on the platform beam to connect with the connecting rod.

Abstract: A jib assembly has a sheath, a jib arm disposed within the sheath, and at least two gripping components disposed on the inner surface of the sheath. The sheath is operable to engage the jib arm to secure the jib arm and prevent the jib arm from extending and retracting relative to the sheath by aligning the sheath to be substantially parallel with the jib arm. The sheath is operable to disengage the jib arm to allow at least a portion of the jib arm to extend and retract relative to the sheath by rotating the sheath away from substantially parallel with the jib arm.

Abstract: The chair lift for boats is a hoist designed to easily move a person with disabilities from a boat into and out of the water. The chair lift for boats comprises a mast, a boom, a hydraulic gantry, a chair, and an optional winch.

Abstract: A centrifugally actuated driving pulley for a continuously variable transmission (CVT) has a movable sheave that is connected to the fixed sheave via a ball spline assembly. Also disclosed is a driving pulley for a CVT having a movable sheave that is connected to the fixed sheave via a ball spline assembly, where at least some of the outer grooves receiving the ball bearings of the ball spline assembly are angularly offset from at least some of the corresponding inner grooves receiving the ball bearings of the ball spline assembly. Also disclosed is a driving pulley for a CVT having a movable sheave that is connected to the fixed sheave via a ball spline assembly, where at least some of the outer and inner grooves receiving the ball bearings of the ball spline assembly have a generally ogival cross-section. A CVT and a vehicle having a CVT are also disclosed.

Abstract: A drive pulley structure has a cylindrical pulley member, a hub structure that is provided inside the pulley member so as to rotate relative to the pulley member, a coil spring that is fixed to the hub structure, a tapering which has a conical round surface as of a cone whose axis is made up of a rotational axis J of the hub structure, and a frictional member that is inserted to be interposed between the conical round surface of the tapering and the pulley member, and the coil spring is inserted to be interposed in place while being compressed in the direction of the rotational axis of the hub structure, the tapering, the frictional member and the pulley member being brought into press contact with each other by virtue of a restoring force P of the coil spring.

Abstract: A load transfer accessory for a loading apparatus such as a crane. The load transfer accessory is a holding mechanism that reduces unwanted movement in cylindrical cargos. The holding mechanism includes an attachment frame, a receiving member and an indexing clutch. The receiving member includes a curved surface for receiving the cylindrical cargo. The indexing clutch can be adjustably locked by wire rope tension to clock the receiving member in a desired angular orientation for loading operations.