A pulley block is disclosed. The pulley block comprises: first and second plates and a pulley sheave disposed between the plates for rotation on bearings upon a sheave axle that extends between the plates along a sheave axis. The plates are connected to the sheave axle so as to permit rotation of one plate with respect to the other about the sheave axis between a closed position of the pulley block and an open position of the pulley block. Each plate has, at a position remote from the sheave axis, a respective bollard formation, which bollard formations are disposed such that, when the plates are in the closed position, the respective bollard formations are in contact with or in close proximity to one another to form a bollard that extends between the plates. When the plates are in the open position, the respective bollard formations are spaced apart. The pulley sheave rotates on bearings upon a sheave axle assembly that extends between the plates along a sheave axis. Which assembly has a main axle that is fixed for rotation with respect to the first plate and free for rotation with respect to the second plate and an axle cap that clamps the main axle to the first plate, the axle cap being removably secured to the main axle.

A sheave assembly for use in a handling system or tensioning system, the sheave assembly having one or more sheaves arranged about a shaft and cone sub-assembly. The shaft and cone sub-assembly may include one or more pairs of bearing cones configured to interface with a plurality of bearing rollers to facilitate rotation of the one or more sheaves about the shaft and cone sub-assembly. The shaft and cone sub-assembly may be configured to be arranged in a fixed rotational position during handling or tensioning operations. The shaft and cone sub-assembly may further be configured to be rotated or repositioned about a central, longitudinal axis of the sub-assembly. The shaft and cone sub-assembly may be configured to rotate independent of the sheave(s) so as to reposition the one or more pairs of cones with respect to applied loading on the sheave assembly from the handling or tensioning operations.

Simultaneously oppositely rotating sheaves, or a chain fall, has a two sheaves upon a hexagonal axle. The first sheave receives a first line clockwise and the second sheave receives a second line counterclockwise. Upon turning the axle, the sheaves handle the lines oppositely. A signal unit regulates power delivered from a power unit to at least one motor. The power unit is preferably a battery or alternatively another source. The motor turns a gearbox that engages the axle cooperating with the sheaves. The chain fall includes an anti-two block per line. Preferably, a pulley has two outer plates and two inner plates on stubs with the first line in the center and the two second lines between an inner plate and an outer plate. A first plate and a spaced away second plate contain the components of the invention in compact form for usage by a crane.

An elevator sheave assembly with independently rotating sheaves includes a shaft having a longitudinal axis and a plurality of sheave subassemblies independently rotatable about the longitudinal axis of the shaft. Each of the plurality of sheave subassemblies includes a sheave having a running surface configured for frictional tractive engagement with a tension member, and at least one bearing rotatably connecting the sheave to the shaft. The elevator sheave assembly further includes a bearing spacer arranged between adjacent sheave subassemblies of the plurality of sheave subassemblies on the shaft to isolate rotation of the adjacent sheave subassemblies relative to one another. Each of the plurality of sheave subassemblies is independently rotatable such that the tension member associated with each of the plurality of sheave subassemblies operates on its own independently rotating sheave.

The invention relates to a hook block base body for fastening to a pulley set of a hoisting apparatus having a plurality of deflection pulleys comprising a means for installing the hook block base body at the pulley set and a load suspension means for suspending a load, characterized by at least one projection element that is configured to cooperate with a deflection pulley on an installation of the hook block base body at the pulley set and only to permit an installation of the hook block base body at the pulley set when the deflection pulley cooperating with the projection element is rope-free.

A rope guide is provided for use in rope rescues and rope climbing. The guide includes a frame comprised of two legs, pivotally connected at the inner ends so that the outer ends can be adjusted between substantially open and substantially closed positions. A lock pin secures the frame in a selected pivotal position. The mouth of the frame between the outer ends of the legs can be positioned over an object, such as a rail, a building edge, or a rock so as to protect the rope from contact with such objects.

An elevator sheave assembly with independently rotating sheaves includes a shaft having a longitudinal axis and a plurality of sheave subassemblies independently rotatable about the longitudinal axis of the shaft. Each of the plurality of sheave subassemblies includes a sheave having a running surface configured for frictional tractive engagement with a tension member, and at least one bearing rotatably connecting the sheave to the shaft. The elevator sheave assembly further includes a bearing spacer arranged between adjacent sheave subassemblies of the plurality of sheave subassemblies on the shaft to isolate rotation of the adjacent sheave subassemblies relative to one another. Each of the plurality of sheave subassemblies is independently rotatable such that the tension member associated with each of the plurality of sheave subassemblies operates on its own independently rotating sheave.

The invention relates to a hook block base body for fastening to a pulley set of a hoisting apparatus having a plurality of deflection pulleys comprising a means for installing the hook block base body at the pulley set and a load suspension means for suspending a load, characterized by at least one projection element that is configured to cooperate with a deflection pulley on an installation of the hook block base body at the pulley set and only to permit an installation of the hook block base body at the pulley set when the deflection pulley cooperating with the projection element is rope-free.

A rope guide is provided for use in rope rescues and rope climbing. The guide includes a frame comprised of two legs, pivotally connected at the inner ends so that the outer ends can be adjusted between substantially open and substantially closed positions. A lock pin secures the frame in a selected pivotal position. The mouth of the frame between the outer ends of the legs can be positioned over an object, such as a rail, a building edge, or a rock so as to protect the rope from contact with such objects.

A sheave assembly for use in a handling system or tensioning system, the sheave assembly having one or more sheaves arranged about a shaft and cone sub-assembly. The shaft and cone sub-assembly may include one or more pairs of bearing cones configured to interface with a plurality of bearing rollers to facilitate rotation of the one or more sheaves about the shaft and cone sub-assembly. The shaft and cone sub-assembly may be configured to be arranged in a fixed rotational position during handling or tensioning operations. The shaft and cone sub-assembly may further be configured to be rotated or repositioned about a central, longitudinal axis of the sub-assembly. The shaft and cone sub-assembly may be configured to rotate independent of the sheave(s) so as to reposition the one or more pairs of cones with respect to applied loading on the sheave assembly from the handling or tensioning operations.