The hoisting arrangement of a hoist of a of a crane, includes a trolley arranged to move along a main support structure of the crane, whereby the trolley includes a support frame structure; bearing wheels which are fastened to the support frame structure and by means of which the trolley is arranged to move along said main support structure; a hoisting mechanism that has a rope drum for a hoisting rope, a rope pulley arrangement which has upper sheave arrangements and lower rope pulley arrangements and through which the hoisting rope may be guided from the rope drum to an attachment point, and a hoisting member in cooperation with the hoisting rope for hoisting a load; whereby the rope drum is supported to the support frame structure of the trolley so that the axle of the rope drum is parallel to the main support structure. In the hoisting arrangement, the disengagement point of the hoisting rope from the rope drum, the attachment point of the sheave, and the attachment point of the first end of hoisting rope are arranged on the same vertical plane of the hoisting arrangement. The rope drum has a first end towards which the hoisting rope is wound in the hoisting member's upper position, and a second end towards which the hoisting rope is unwound in the hoisting member's lower position. The first rope pulley of the rope pulley arrangement is so placed that the release point of the hoisting rope from the first rope pulley to the first sheave is, in the axle direction of the rope drum, further from the second end than the first end of the rope drum.

A lifting system for a crane for generating a hoist rope pretension during a travel of a suspension element of the crane is provided. The system includes a separable pretension hook block and a connected auxiliary rope that is supported in a windable and unwindable manner on an auxiliary winch on the crane, and that is guided over a deflection apparatus arranged or installable at a boom of the crane. The pretension hook block comprises two lockable hook block parts that are releasably lockable to one another, that are connected to one another via the auxiliary rope, and of which an upper hook block part has a fastening means for fastening to the suspension element of the crane and a lower hook block part has a pick-up means for fastening a weight.

A lifting system for a crane for generating a hoist rope pretension during a travel of a suspension element of the crane is provided. The system includes a separable pretension hook block and a connected auxiliary rope that is supported in a windable and unwindable manner on an auxiliary winch on the crane, and that is guided over a deflection apparatus arranged or installable at a boom of the crane. The pretension hook block comprises two lockable hook block parts that are releasably lockable to one another, that are connected to one another via the auxiliary rope, and of which an upper hook block part has a fastening means for fastening to the suspension element of the crane and a lower hook block part has a pick-up means for fastening a weight.

A deflection roller (32) for a deflection roller package (33) of a wire saw (1), having a wheel (32), a pivot bearing (42) and a sealing element (55). The wheel (32) has a raceway (45) along the periphery thereof for guiding a saw wire (3) of the wire saw (1). The pivot bearing (42) is coaxially inserted in the wheel (32). An outer sleeve (51) protrudes from a lateral surface (49) of the wheel (32). An inner sleeve (50) protrudes from a lateral surface opposite the one lateral surface (49). A radius (53) of the inner sleeve (50) is smaller than a radius (52) of the outer sleeve (51). The sealing element (55) is placed on the outer sleeve (51) or inserted into the inner sleeve (50).

A vertical lifting device and method are provided. The vertical lifting device includes a fixed frame fixed to a foundation. A first cavity allowing passage of a lifting rope is provided in the middle of the fixed frame. A sliding frame moving horizontally on the fixed frame is arranged above the fixed frame. A second cavity allowing passage of the lifting rope is provided in the middle of the sliding frame. At least two stepping vehicles alternately lowering or lifting weights are arranged on the sliding frame and move on the sliding frame. The stepping vehicles are spaced in preset distances. The lifting rope penetrates through the stepping vehicles in sequence. Each stepping vehicle is provided with a clamping part clamping the lifting rope and a driving mechanism driving the stepping vehicle to move on the sliding frame.

A vertical lifting device and method are provided. The vertical lifting device includes a fixed frame fixed to a foundation. A first cavity allowing passage of a lifting rope is provided in the middle of the fixed frame. A sliding frame moving horizontally on the fixed frame is arranged above the fixed frame. A second cavity allowing passage of the lifting rope is provided in the middle of the sliding frame. At least two stepping vehicles alternately lowering or lifting weights are arranged on the sliding frame and move on the sliding frame. The stepping vehicles are spaced in preset distances. The lifting rope penetrates through the stepping vehicles in sequence. Each stepping vehicle is provided with a clamping part clamping the lifting rope and a driving mechanism driving the stepping vehicle to move on the sliding frame.

A modular elevator sheave comprises a mandrel body, wherein multiple sheave units are arranged side by side along the mandrel body, and wherein, the outer wall of the outer circumference of the sheave unit is provided with a groove. In this structural composition, the mandrel body with multiple sheave units, which increases the overall strength and rigidity of the sheave. Furthermore, the number of sheave unit used can be increase and decrease depending on the need or situation, and it should be noted that since the sheave unit can be replaced individually when damaged, it is easier to maintain and reduce repairing costs.

A method for replacing a length of a wire/cable in a hoisting system. The wire/cable extends from a storage drum to a winch. The method includes removing at least one lock which prevents a deadline anchor arranged between the storage drum and the winch from rotating, reeling onto the storage drum a first length of the wire/cable with a simultaneous coordinated operation of the deadline anchor and the storage drum, the simultaneous coordinated operation being controlled so that the wire/cable is in a continuous tension between the deadline anchor and the storage drum, securing the wire/cable to an attachment point, cutting a section of the wire/cable between the attachment point and the winch and removing the cut section of the wire/cable, reattaching the wire/cable remaining to the winch, reeling out a second length of the wire/cable from the storage drum, and securing the wire/cable to the deadline anchor.

A method for replacing a length of a wire/cable in a hoisting system. The wire/cable extends from a storage drum to a winch. The method includes removing at least one lock which prevents a deadline anchor arranged between the storage drum and the winch from rotating, reeling onto the storage drum a first length of the wire/cable with a simultaneous coordinated operation of the deadline anchor and the storage drum, the simultaneous coordinated operation being controlled so that the wire/cable is in a continuous tension between the deadline anchor and the storage drum, securing the wire/cable to an attachment point, cutting a section of the wire/cable between the attachment point and the winch and removing the cut section of the wire/cable, reattaching the wire/cable remaining to the winch, reeling out a second length of the wire/cable from the storage drum, and securing the wire/cable to the deadline anchor.

An apparatus, system, and related methods for holding and maneuvering an industrial vehicle spare tire include a tire support positioned on an industrial vehicle. An industrial vehicle tire is removably securable to the tire support, wherein the tire support has at least two independently adjustable threaded members for controlling engagement of the tire support and the industrial vehicle tire. A winch is positioned proximate to the gate of the industrial vehicle. At least one pulley is positioned above the tire support, wherein at least one winch cable is connected between the winch and the at least one pulley.