Abstract: A platform 12 is supported by four belts 22 to 25. Of the belts 22 to 25, a pair of belts 24, 25 is attached to a pivoting arm 26 so that the pivoting arm 26 is pivotable around a pivoting shaft 28. Pivoting of the pivoting arm 26 absorbs, for example, the difference in length between the belts 24, 25. The present invention makes it possible to simplify an elevate and lower driving mechanism of the platform 12 and to easily adjust the lengths of the belts 22 to 25. The present invention also makes it possible to prevent vibration during elevation or lowering and to allow the belts 22 to 25 to stand long use.

Abstract: A practical intelligent assist device is provided that eliminates the complex use of force sensing weigh cells and vector interpreting software. By simplifying the input to a series of traditional voltage inputs, i.e. 1-4 volt signals, the use of standard available control componentry becomes available. Utilizing a series of such simplified inputs, including a load angle feedback, the processing of the vector math can be accomplished within a programmable logic controller (PLC). Outputs can then be simply generated to control a series of 0-60 Hz digital signals to drive direct drive motors.

Abstract: A traveling crane according to the present invention includes a hook hoisting guide sheave for guiding a hook hoisting rope from the top of a boom toward the end of a jib, and the hook hoisting guide sheave is arranged on the top of the boom in a state that the guide sheave can guide the hook hoisting rope along the upper surface of the boom by folding the rope toward an upper spreader placed at a position adjacent to a boom anchor during assembling/disassembling of the crane. Thereby, the upper spreader can be moved between the boom anchor and a far end of the boom without providing a guide sheave dedicated for moving the upper spreader. Pairs of support legs are downward provided on both sides and in front and in rear of the upper spreader and a roller is provided for each support leg, so that interference between the upper spreader during movement and obstacles on the boom upper surface can be prevented even in a horizontal movement system excellent in operating efficiency.

Abstract: This invention relates to a load hoist arrangement (1) comprising a control device (50) arranged between a traverse device and a load carrying device (52). The load carrying device (52) is manually guidable in a three-dimentional space and lateral movement of said load carrying device (52) is controlled by a driving device. The driving device is controlled by recorded and transmitted force impacts from said control device (50) to said driving device. The traverse device has support elements (5, 6, 7) for supporting a traveling bridge (4), arranged to travel along said support elements (5, 6, 7), and a carriage (3) arranged to travel back and forth on said traveling bridge (4). The driving device comprises at least one motor, provided with at least two driving wheel units (15, 16), secured to said carriage (3) and two drag elements (21, 21?) secured at its end portions to opposite end portions of said support elements (5, 6) and crossing at said traveling bridge (4).

Abstract: A gantry crane (10) is configured in a panel turner application. The gantry crane (10) generally includes a gantry crane structure (14) having a first cross-beam (28) and a second cross-beam (30). A first main hoist mechanism (40) and a first auxiliary hoist mechanism (42) are coupled to the first cross-beam (28), and a second main hoist mechanism (44) and a second auxiliary hoist mechanism (46) are coupled to the second cross-beam (30). The crane (10) includes a hydraulic system configured to reduce the lift capacity of the first and/or second main hoist mechanism (40, 44), and to equalize the hoist capacity between the first and second main hoist mechanisms (40, 44) or the first and second auxiliary hoist mechanisms (42, 46) in certain applications. The auxiliary hoist mechanism (42, 46) are configured for powered movement along the respective cross-beams (28, 30).

Abstract: A tracked vehicle with a front blade for clearing roads and a rear mounted crane to set and rig a utility pole in remote locations. The front blade is configured with mounts to carry an auger. A cradle on the front blade and on an outrigger of the crane is used to transport a pole. The vehicle is configured to carry all necessary accessories to the site including a pole grapple, a collapsible personnel bucket, and a water supply for cutting and/or compacting the hole. The crane folds to a compact configuration behind the cab of the tracked vehicle and, when extended, can access poles up to 85 feet tall. The crane can be operated by remote control for safe operation near energized lines or when positioned on steep terrain. The crane can be removed from the vehicle in the field for unencumbered use of the tracked vehicle and blade.

Abstract: The invention relates to a derrick crane having a main boom and having a derrick boom which are connected to one another by a stay cable to guy the main boom, having an auxiliary tip adjoining the main boom and a stay cable for its guying. In accordance with the invention, the stay cable of the auxiliary tip engages at the auxiliary tip at the one end and at the stay cable of the main boom at the other end.

Abstract: An overhead buffer 24 is provided on a side of a running rail 4 for an overhead travelling carriage 8. The height level of an article on the overhead buffer 24 is slightly lower than that on the running overhead travelling carriage 8. This height is at least such that the overhead buffer 24 does not interfere with an operator. According to the present invention, the overhead buffer can be installed even if load ports are consecutively provided.

Abstract: The present invention relates to a crane boom for transport as container freight which can be assembled from a plurality of boom parts which each have coupling pieces at the front face end for the putting together of the boom parts, wherein the boom parts each have at least one bottom chord and can be placed next to one another such that the bottom chords of the boom parts together form a continuous runway free of offset and faults for a crab. The invention further relates to a transport apparatus for the transport of boom parts of a crane boom of this type as container freight. In accordance with the invention, the boom parts of the crane boom, despite the identical bottom chord track dimensions which provide a runway for a normal crab on the bottom chords largely free of offset and faults, have different cross-sections such that the boom parts can be pushed into one another for the purpose of transport, whereby the space in the boom parts is also utilized.

Abstract: At an inner circumference side of a lower ring and an upper ring, flange pars are formed respectively, and a ring-shaped clamp device is arranged at the inner circumference side, and separated at four points, into a front side, back side, left side, and right side, and divided into four divided clamps. At the separation points of front and back sides, the left and right divided clamps are rotatably connected with each other, and at the separation points of left and right sides, the front and back divided clamps are connected to cylinders respectively. By the extension/contraction operation, the front and back clamps move between joint and separation positions, and if the front and back clamps position at the joint points, predetermined spaces are formed between the divided clamps. Lock blocks to be inserted into the spaces for regulating return of the divided clamps to the separation positions are provided.

Abstract: An upper cross-sectional part for a telescopic part of a crane comprises a central flat cross-sectional element and, connected to the central flat cross-sectional element on each side thereof, a first outwardly curved cross-sectional element; a second flat cross-sectional element; a second outwardly curved cross-sectional element; and a third flat cross-sectional element.

Abstract: A blondin cableway installation, comprises a pair of carrying cables extending between the two ends of the installation; a carriage provided with a lifting tackle and supported movably on the carrying cables; a lifting cable for operating the lifting tackle, extending between the two ends of the installation; an outward haulage cable for conveying the carriage along the pair of carrying cables, said outward haulage cable being connected via tackle to the carriage so as to have a pair of outward haulage sections which extend between the carriage and each end of the installation; and a plurality of cradles arranged along the pair of carrying cables and suspended from them in a stationary manner and designed to support the lifting cable and outward haulage cable, each of the cradles comprising, on each side, a pair of support rollers able to receive by means of gravity, alternately, the outward haulage cable or the lifting cable, and a corresponding pair of retaining rollers able to bias the lifting cable and ha

Abstract: A carriage of the types commonly used in skyline logging operations. The invention facilitates moving logs along a suspended skyline by means of a hoisting system built into the carriage comprised of a radio controlled electronics system, an internal combustion power plant, proportional controlled hydraulically driven skidline sheave, a skidline clamp and skyline clamp. A novel method of pump control keeps the internal combustion engine operating within its power band. The volume output of the pump is controlled by engine RPM to adjust the pump's load on the engine. Combined operation of the various controls on the carriage, in conjunction with the controlled operations of the yarder winch at the end of the skyline, result in a system well suited for efficient logging operation. The choker/setter (ground crew) and the yarder are able to remotely control the carriage operation as a team. The carriage controls of the present invention are primarily hydraulic, actuated by means of electrical solenoid valves.

Abstract: The present disclosure relates to a method of operating a crane whose safe working load depends on one or more changeable parameters, with the change of at least one of the parameters being made such that the speed of the parameter change is reduced continuously or step-wise before a parameter value is reached at which the safe working load corresponds to the actual working load.

Abstract: The invention relates to a method for controlling swaying and swinging of a spreader in a crane and the load attached thereto, the crane comprising: a trolley, hoist gears, hoisting ropes, on which the spreader is suspended from the trolley, auxiliary gears provided with motors and motor control equipment and auxiliary ropes, and in which method the forces of the auxiliary ropes exerted on the spreader are controlled by moving the auxiliary ropes using the auxiliary gears by means of torque instructions (Tcontrol) obtained on the basis of the rope forces (Frope) of the auxiliary ropes and the rotating speed data of the auxiliary gears, and whereby the rotating speed data of each auxiliary gear is formed gear-specifically as the difference between the measured rotating speed (nact) of the auxiliary gear and the calculated rotating speed (ncalc) of the auxiliary gear.

Abstract: In a wafer transfer system wherein a wafer transfer robot linearly reciprocates by a linear motor, dust is prevented from adhering to a wafer. A fixed base 9, on which the secondary side 11 of a linear motor M for linearly reciprocating a wafer transfer robot R is mounted, is mounted on the system body 1 of a wafer transfer system A in lateral directions and in vertical directions, so that dust dropping in accordance with the flow of clean air K from a clean air supply system 4 is directly sucked into an exhaust fan 5, which is provided on the bottom portion 1c of the system body 1, to be exhausted without being deposited on the top face of the fixed base 9 and the secondary side 11.

Abstract: The invention relates to a method for controlling swaying and swinging of a spreader in a crane and the load attached thereto, the crane comprising: a trolley, hoist gears, hoisting ropes, on which the spreader is suspended from the trolley, auxiliary gears provided with motors and motor control equipment and auxiliary ropes, and in which method the forces of the auxiliary ropes exerted on the spreader are controlled by moving the auxiliary ropes using the auxiliary gears by means of torque instructions (Tcontrol) obtained on the basis of the rope forces (Frope) of the auxiliary ropes and the rotating speed data (n) of the auxiliary gears, and whereby the torque instruction of the motor control equipment in each auxiliary gear is formed gear-specifically as a sum of a static (Tstat) and a dynamic (Tdyn, calc) term.

Abstract: The present disclosure relates to a mobile crane comprising an undercarriage and a superstructure arranged in a revolving manner thereon with a device for the reception of ballast. In accordance with the present disclosure, the device for the reception of ballast comprising at least three pulling means which can be moved up and down vertically and which can be connected to a pallet or base plate carrying the ballast and located beneath the total center of gravity of the ballast to pull the pallet or base plate toward the superstructure and to connect it to it or to let it down from it.

Abstract: The embodied hoisting mechanism has a hoisting cable, a hoisting-cable drive, a frame and a jib that can be topped. Hoisting-cable drive means form a path for the hoisting cable. A displaceable hoisting-cable guide is used with the hoisting cable so that the displacement of the displaceable hoisting-cable guide changes the length of the path. The displaceable hoisting-cable guide has an associated first hydraulic component with a first chamber that can be connected to a second hydraulic component with a second chamber of variable volume. A pressure source is coupled to the second hydraulic component in order to maintain a substantially constant hydraulic pressure in the second chamber. A pressure-limiting valve assembly, which is partially actuated by a topping-means loading sensor, is incorporated in the connection.

Abstract: The within invention concerns a crane with a rotating platform that can rotate on a vertical axle, a boom that is connected to the rotating platform and which can luff on a luffing axle, guying connected on the one hand with the boom and on the other hand with a guy support, which can slew on an axle parallel to the luffing axle of the boom and is connected with the rotating platform and/or the boom foot, as well as an adjustment mechanism, in particular adjustment cabling, that serves for the luffing of the boom and which is connected with the guy support. According to the invention, the crane is also characterized by the presence of an angle adjustment mechanism by means of which the angle of the guy support can be adjusted relative to the boom when the boom is raised.