Abstract: The invention relates to an apparatus for ballast weighing on a crane, comprising at least two ballasting cylinders that are equipped to lift/lower the ballast and that each comprise at least one pressure transducer in the region of the piston and/or rod side, and comprising at least one evaluation unit that is equipped to calculate the mass moved by the ballasting cylinders from the pressures detected by the pressure transducers on retraction and/or extension of the ballasting cylinders, excluding the friction forces occurring in the ballasting cylinders. The invention furthermore is directed to a method for calculating the ballast weight of a crane by means of a corresponding apparatus.

Abstract: The present invention relates to an apparatus for recognizing the replacement state of a high-strength fiber rope for lifting gear such as cranes as well as to a lifting gear such as a crane in which such a high-strength fiber rope is installed. It is the underlying object of the present invention to provide an improved apparatus for determining the replacement state of a high-strength fiber rope and to provide improved lifting gear having such a fiber rope that avoid the disadvantages of the prior art and further develop the latter in an advantageous manner.

Abstract: The present disclosure relates to an apparatus for stabilizing a crane, in particular a crawler crane, in an anchorage position, having at least one load coupled to a first boom of the crane to compensate a first torque introduced into the crane due to wind and having at least two additional supports arranged opposite one another to compensate a second torque introduced into the crane due to wind. The disclosure is furthermore directed to a corresponding additional support and to a crane having a corresponding apparatus.

Abstract: The invention relates to an apparatus for ballast weighing on a crane, comprising at least two ballasting cylinders that are equipped to lift/lower the ballast and that each comprise at least one pressure transducer in the region of the piston and/or rod side, and comprising at least one evaluation unit that is equipped to calculate the mass moved by the ballasting cylinders from the pressures detected by the pressure transducers on retraction and/or extension of the ballasting cylinders, excluding the friction forces occurring in the ballasting cylinders. The invention furthermore is directed to a method for calculating the ballast weight of a crane by means of a corresponding apparatus.

Abstract: The invention relates to a crane having at least one apparatus for determining the effective counterweight of said crane comprising at least one receiver for receiving at least one counterweight body; at least one coupling that is configured to pivotably couple the receiver with the further structure of the crane; and at least one abutment that is configured to limit the pivot range of the receiver.

Abstract: The present disclosure relates to a mobile crane having an undercarriage and a superstructure rotatable about an axis of rotation with respect to the undercarriage and having a ballast mounting apparatus couplable to the superstructure. The present disclosure is furthermore directed to a corresponding ballast mounting apparatus.

Abstract: A crane may include a travelable undercarriage, a superstructure rotatably supported thereon with a luffable boom system arranged thereon and a derrick boom, with an auxiliary crane being used as derrick ballast. In The auxiliary crane may be driven onto a ballast base plate attached to the derrick boom for the alignment of the boom system in order to thus form at least a large portion of the counter-weight.

Abstract: The invention relates to a crane having at least one apparatus for determining the effective counterweight of said crane comprising at least one receiver for receiving at least one counterweight body; at least one coupling that is configured to pivotably couple the receiver with the further structure of the crane; and at least one abutment that is configured to limit the pivot range of the receiver.

Abstract: The present disclosure relates to a method for the automatic telescoping of the boom system of a crane, in particular of a mobile crane, having at least one telescopic boom, and having a rope and a winch for pivoting the boom. The method comprises measuring an actual value of the boom angle of the boom and actuating, in particular automatically, the winch in dependence on the measured boom angle.

Abstract: The present disclosure relates to a method for operating a crane with a traversable undercarriage, an uppercarriage rotatably mounted on the same with luffing main boom and derrick boom arranged thereon, wherein an auxiliary crane with telescopic boom as derrick ballast is connected with the crane and via the telescopic boom of the auxiliary crane the derrick ballast radius is adjusted. According to the present disclosure, a suspended ballast is lifted in addition to the auxiliary crane provided as derrick ballast for erecting the main boom, wherein first the auxiliary crane is lifted, before the suspended ballast is lifted, when necessary. The present disclosure also relates to a crane for carrying out the method.

Abstract: The present invention relates to an apparatus for recognizing the replacement state of a high-strength fiber rope for lifting gear such as cranes as well as to a lifting gear such as a crane in which such a high-strength fiber rope is installed. It is the underlying object of the present invention to provide an improved apparatus for determining the replacement state of a high-strength fiber rope and to provide improved lifting gear having such a fiber rope that avoid the disadvantages of the prior art and further develop the latter in an advantageous manner.

Abstract: The present invention relates to a boom element for a telescopic boom, in particular a telescopic section or a pivotal piece of a telescopic boom, wherein the boom element has a substantially box-shaped hollow structure and wherein at least one component of a pinning system is arranged in at least one of the corner edges of the box-shaped hollow structure, wherein at least one further boom element located in the boom element and/or about the boom element can be pinned to the boom element by means of the pinning system for the purpose of fixing, and wherein the component of the pinning system is and/or includes at least one pin mount and/or at least one pin guide in which the at least one pin is guided and/or movable.

Abstract: The present disclosure relates to an apparatus for stabilizing a crane, in particular a crawler crane, in an anchorage position, having at least one load coupled to a first boom of the crane to compensate a first torque introduced into the crane due to wind and having at least two additional supports arranged opposite one another to compensate a second torque introduced into the crane due to wind. The disclosure is furthermore directed to a corresponding additional support and to a crane having a corresponding apparatus.

Abstract: The present disclosure relates to a crane having a travelable undercarriage and a superstructure which is rotatably supported thereon, to which a boom is luffably connected in an articulated manner, on the one hand, and a counterweight arrangement is telescopically supported, on the other hand. In accordance with the present disclosure, the counterweight arrangement comprises a U-shaped frame in which a likewise U-shaped counterweight frame is telescopically guided. The counterweight plates forming the counterweight are separated into two stacks which are each longitudinally displaceably guided on a side member.

Abstract: The present disclosure relates to a mobile crane having an undercarriage and a superstructure rotatable about an axis of rotation with respect to the undercarriage and having a ballast mounting apparatus couplable to the superstructure. The present disclosure is furthermore directed to a corresponding ballast mounting apparatus.

Abstract: The invention relates to a crane having an undercarriage with a swivel connection and having a superstructure rotatably supported thereon via the swivel connection and comprising at least one boom system arranged at said superstructure and luffable about a luffing axis or a self-climbing tower slewing crane rotatably supported thereon via the swivel connection. In accordance with the invention, the undercarriage has a pot as a central component which, on the one hand, receives the swivel connection. Furthermore, however, the pivotable supports can also be pivotally connected to it. Side members are present at mutually oppositely disposed sides and at least one traveling gear can respectively connected to them with at least one degree of freedom.

Abstract: The invention relates to a method of raising a telescopic boom of a mobile crane having a luffing fly jib and having a spatial boom guying. To be able to raise particularly long luffing fly jib systems together with the telescopic boom here, in accordance with the invention the telescopic boom is first telescoped outwardly to its desired length. In this position, all the telescopic sections are bolted to one another and the spatial guying is tensioned before the raising of the luffing fly jib pivotally connected to the telescopic boom.

Abstract: The present invention relates to a crane, particularly a crawler crane, whereby at least two different drive units can be alternately connected with the crane. The invention is additionally directed at corresponding drive units.

Abstract: A crane may include a travelable undercarriage, a superstructure rotatably supported thereon with a luffable boom system arranged thereon and a derrick boom, with an auxiliary crane being used as derrick ballast. In The auxiliary crane may be driven onto a ballast base plate attached to the derrick boom for the alignment of the boom system in order to thus form at least a large portion of the counter-weight.

Abstract: The invention relates to a method of assembling a crane having a telescopic boom which has a coupling section, a telescopic cylinder supported therein and at least one telescopic section, wherein at least one telescopic section is transported to the site of deployment separately from the coupling section and the at least one separately moved telescopic section is drawn, in particular drawn slowly, into an outer section, in particular into the coupling section, in the assembly position by the telescopic cylinder by means of an auxiliary assembly head.