A jib crane cart assembly including a platform having a proximal surface and a distal surface, the platform having a reinforcement structure between the proximal surface and the distal surface, a pair of masts extending from the proximal surface of the platform, each of the masts having a jib arm moveably secured thereto, and a set of wheels secured to the platform, wherein the set of wheels are arranged for a cart track of a coke oven battery.

A lifting rig for moving heavy objects on rooftops having a framework supported by a plurality of sets of wheel assemblies. The framework has a pair of longitudinal truss assemblies wherein each truss assembly sits on top of the sets of wheel assemblies. Each of the two truss assemblies has a mast member extending upwardly to a cross beam which thus connects both truss members. Each mast member extends telescopically from an anchor post which itself extends perpendicularly from a truss member forming part of the truss assembly. From the cross beam hangs at least one chain block for raising and lowering a load; the chain block is hooked onto a means for hooking straddling over the cross beam.

A lifting rig for moving heavy objects on rooftops having a framework supported by a plurality of sets of wheel assemblies. The framework has a pair of longitudinal truss assemblies wherein each truss assembly sits on top of the sets of wheel assemblies. Each of the two truss assemblies has a mast member extending upwardly to a cross beam which thus connects both truss members. Each mast member extends telescopically from an anchor post which itself extends perpendicularly from a truss member forming part of the truss assembly. From the cross beam hangs at least one chain block for raising and lowering a load; the chain block is hooked onto a means for hooking straddling over the cross beam.

Various hoisting systems having an assembly for gripping a hoisting line are provided. In one embodiment, an apparatus includes a hoisting system having a plurality of sheaves and a chain reeved about the plurality of sheaves. The chain includes links having clamps for selectively gripping a hoisting line. The hoisting system also includes a closing track having a travel path for the clamps of the links of the chain. This travel path includes an opening between two opposing surfaces and at least a portion of the opening has a width between the two opposing surfaces narrower than the widths of the clamps, when open, such that, when the links pass along the travel path of the closing track, the two opposing surfaces cause the clamps to close about the hoisting line. Additional systems, devices, and methods are also disclosed.

Various lifting systems are described that use one or more of the following features. A method for setting an adjustable height upper pulley on a tall structure; load transfer from a suspended load to a tall structure; fan-based stabilizer; stabilizer or horizontal load position control mechanism using a closed loop of cable and taction winch for a crane application; crane-based lifting system that uses a closed loop of lifting cable looped around a traction winch; and a stabilizer or horizontal load position control mechanism that does not need a closed loop of cable. Other embodiments are also described and claims. Other embodiments are also described and claimed.

Various lifting systems are described that use one or more of the following features. A method for setting an adjustable height upper pulley on a tall structure; load transfer from a suspended load to a tall structure; fan-based stabilizer; stabilizer or horizontal load position control mechanism using a closed loop of cable and taction winch for a crane application; crane-based lifting system that uses a closed loop of lifting cable looped around a traction winch; and a stabilizer or horizontal load position control mechanism that does not need a closed loop of cable. Other embodiments are also described and claims. Other embodiments are also described and claimed.

A telescoping barrier assembly provides interlocking modules coupled together so as to slide vertically with respect to the other. The modules telescopically extend to a deployed position to form a barrier that withstands inertial and the external forces, and then retracts to a collapsed position. The modules include a base module and a plurality of deployable modules that are arranged in a nested configuration, such that each module slides in and out of an adjacent module. The base module has a mounting portion that may be subterranean. A lifting mechanism applies an axial force to the deployable modules to enable displacement between the operational and collapsed position. Spring biased lateral support members help the deployable modules remain in the extended position and a pulley system helps displace the modules to the collapsed position. An inner and outer seal inhibit liquid leakage between the module and between multiple adjacent assemblies.

A load line guide is configured to direct a load line of an crane along a boom assembly, the load line guide comprising a guide housing and a first guide cam. The guide housing presents a gap oriented in a lateral direction and a channel oriented in a longitudinal direction. The first guide cam is pivotably secured to the guide housing and disposed in the gap. The first guide cam is configured to be selectively placed into an open position and a closed position. While the first guide cam is in the open position, the load line guide is configured to receive the load line into the channel of the guide housing; and while the first guide cam is in the closed position, the guide housing is configured to retain the load line guide within the channel of the guide housing.

A crane includes a boom and a derricking mechanism, wherein: the derricking mechanism includes a linking device connecting one end of a guy line to a distal end of the boom; the linking device includes a joint connected to one end of the guy line, and a support device provided on the distal end to support the joint so as to locate the joint at a position away from the back surface and opposite to the ventral surface; and the support device includes a holding member which holds the joint, the holding member allowing the position of the joint to be selectively changed to a plurality of different positions in a first direction perpendicularly intersecting an axis of the boom and a rotary axis of the boom.

A crane includes a boom and a derricking mechanism, wherein: the derricking mechanism includes a linking device connecting one end of a guy line to a distal end of the boom; the linking device includes a joint connected to one end of the guy line, and a support device provided on the distal end to support the joint so as to locate the joint at a position away from the back surface and opposite to the ventral surface; and the support device includes a holding member which holds the joint, the holding member allowing the position of the joint to be selectively changed to a plurality of different positions in a first direction perpendicularly intersecting an axis of the boom and a rotary axis of the boom.