A sling gear (1) for single-arm operation by a remotely controlled gripper may have a closure (4) that can be moved from a closed position (5) into an open position (82), a sling body (2) that is closed in the closed position (5) of the closure (4) and open in the open position (82), and an push-button (18) for opening the closure (4). The push-button (18) may have a gear section (68), which couples the closure (4) with the push-button (18), by transmitting movement. In order to improve the reliability in operation, also under adverse circumstances, for example in a heavily soiled environment on the seabed, the push-button (18) may be equipped with an locking area (56), which, in the closed position (5), is to be found engaged with the closure (4), and locks the closure (4) in the closed position (5).

A combination hook assembly and unmanned aerial vehicle (UAV) are adapted to tow a cable. The fuselage of the UAV includes a mounting surface. The hook assembly includes a first member and a second member. The first member has a distal end, and a proximate end mounted on and projecting transverse the mounting surface. The second member is mounted on the distal end and projects transverse thereto. The cable is engageable with the hook assembly.

A significant improvement over existing devices and methods for lifting highway guardrail and similar bulky and heavy objects, this invention comprises a combination prying and lifting device (20) having a cable component (24) which has at one end a hook device (44) for grasping the guardrail panel (21) and has at the other end a component (30) for grasping the edge of the guardrail. This invention provides workers with significant protection from various types of injuries associated with isolating, lifting, installing and removing guardrail panels.

A significant improvement over existing devices and methods for lifting highway guardrail and similar bulky and heavy objects, this invention comprises a combination prying and lifting device (20) having a cable component (24) which has at one end a hook device (44) for grasping the guardrail panel (21) and has at the other end a component (30) for grasping the edge of the guardrail. This invention provides workers with significant protection from various types of injuries associated with isolating, lifting, installing and removing guardrail panels.

A sling bar device includes a central hub and a plurality of sling bar arms extending outwardly from the central hub. At least one of the plurality of sling bar arms is rotatable about the central hub to move a connection location from one angular position to another angular position relative to the central hub.

A sling bar device includes a central hub and a plurality of sling bar arms extending outwardly from the central hub. At least one of the plurality of sling bar arms is rotatable about the central hub to move a connection location from one angular position to another angular position relative to the central hub.

A method for installing pipeline segments within a conduit. The method includes a step of securing a first pipe segment of the pipeline segments at a top end of the conduit, a step of aligning a main axis of a second pipe segment of the pipeline segments with the main axis of the pipeline, a step of lifting the second pipe segment from a first position associated with a bottom end of the conduit to a second position adjacent to the first pipe segment, a step of abutting a top rim of the second pipe segment against a bottom rim of the first pipe segment, and a step of attaching the top rim of the second pipe segment to the bottom rim of the first pipe segment.

A method for installing pipeline segments within a conduit. The method includes a step of securing a first pipe segment of the pipeline segments at a top end of the conduit, a step of aligning a main axis of a second pipe segment of the pipeline segments with the main axis of the pipeline, a step of lifting the second pipe segment from a first position associated with a bottom end of the conduit to a second position adjacent to the first pipe segment, a step of abutting a top rim of the second pipe segment against a bottom rim of the first pipe segment, and a step of attaching the top rim of the second pipe segment to the bottom rim of the first pipe segment.

A shortening hook with a coupling connection for shortening sling chains in hangers, having a hook body which comprises an eyelet at the top for coupling to a suspension ring and at the bottom a coupling connection with a coupling slot which is delimited by two parallel side wings and is downwardly open for the suspension of a chain and in its central region comprises a hooking-in region, which realizes an upwardly open, rectilinearly extending shortening slot and on which a chain, which is coupled to the coupling connection, is hookable by way of its free end region. In each case, only a coupling slot and a shortening slot are realized on the hook body and, when the shortening hook is seen in side view, are mounted offset laterally with respect to one another.

Methods and systems for monitoring at least one crane, preferably two or more cranes, in particular revolving tower cranes, on a construction site, wherein one or more optical detection means are provided, and wherein a collision monitoring unit analyzes the recorded optical data to recognize a possible collision between at least one crane and one further crane and/or another projecting edge.