Abstract: This invention relates to a large crane with an at least two-part main boom, wherein a lower and an upper part of the main boom are pivotally coupled to each other an articulation point. The invention furthermore is directed to a method for erecting or depositing a corresponding large crane.

Abstract: A measuring device for load sensing in a lifting-cable-based hoist, in particular a crane, having at least one pulley for deflecting the lifting cable of the hoist, a fastening means in the form of a cable loop, at the end of which the pulley is mounted so as to be rotatable about its roller axis, and at least one measuring element for sensing a force applied to the pulley.

Abstract: This invention relates to a large crane with an at least two-part main boom, wherein a lower and an upper part of the main boom are pivotally coupled to each other an articulation point. The invention furthermore is directed to a method for erecting or depositing a corresponding large crane.

Abstract: A measuring device for load sensing in a lifting-cable-based hoist, in particular a crane, having at least one pulley for deflecting the lifting cable of the hoist, a fastening means in the form of a cable loop, at the end of which the pulley is mounted so as to be rotatable about its roller axis, and at least one measuring element for sensing a force applied to the pulley.

Abstract: The present invention relates to a lattice piece for a crane boom consisting of a first and a second lattice section element, each comprising a first chord member which extends substantially parallel to the longitudinal direction of the lattice section element, a second chord member which extends substantially parallel to the longitudinal direction of the lattice section element, a first web member which is firmly connected with the first chord member and the second chord member, and preferably extends in the plane defined by the first chord member and the second chord member, wherein a first web member is firmly connected with the first chord member and rises from a plane defined by the first chord member and the second chord member, wherein at its end facing away from the first chord member the second web member includes a fastening means for a releasable connection.

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 present invention relates to a lattice piece for a crane boom consisting of a first and a second lattice section element, each comprising a first chord member which extends substantially parallel to the longitudinal direction of the lattice section element, a second chord member which extends substantially parallel to the longitudinal direction of the lattice section element, a first web member which is firmly connected with the first chord member and the second chord member, and preferably extends in the plane defined by the first chord member and the second chord member, wherein a first web member is firmly connected with the first chord member and rises from a plane defined by the first chord member and the second chord member, wherein at its end facing away from the first chord member the second web member includes a fastening means for a releasable connection.

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 present disclosure relates to a hook-type bottom block for a crane, preferably a mobile crane, comprising a lower part to which the hook is fastened in a rotatable and tiltable manner and an upper part in which rollers are supported via which at least one hoist rope can be sheared in. In accordance with the present disclosure, the rollers are combined in a plurality of roller sets connectable to one another in a modular manner.

Abstract: The within invention concerns a crane with a superstructure that rotates on a vertical axle, a boom coupled to the superstructure in such manner as to luff on a horizontal axle, luffing equipment for luffing the boom, and an operating ballast that counteracts the moment of the boom. According to the invention, the crane is characterized by an auxiliary erection frame that can be attached to the superstructure and/or the operating ballast in such manner as to project backward and can be connected with an auxiliary erection ballast for the erection of the boom.

Abstract: The present disclosure relates to a hook-type bottom block for a crane, preferably a mobile crane, comprising a lower part to which the hook is fastened in a rotatable and tiltable manner and an upper part in which rollers are supported via which at least one hoist rope can be sheared in. In accordance with the present disclosure, the rollers are combined in a plurality of roller sets connectable to one another in a modular manner.

Abstract: The within invention concerns a crane with a superstructure that rotates on a vertical axle, a boom coupled to the superstructure in such manner as to luff on a horizontal axle, luffing equipment for luffing the boom, and an operating ballast that counteracts the moment of the boom. According to the invention, the crane is characterized by an auxiliary erection frame that can be attached to the superstructure and/or the operating ballast in such manner as to project backward and can be connected with an auxiliary erection ballast for the erection of the boom.

Abstract: The present invention relates to a mobile crane substructure with a crawler travel gear arrangement comprising a chassis frame and four individual crawler travel gear elements which are held on bearings located on the chassis frame. According to the invention, the mobile crane substructure is characterised in that the chassis frame comprises two transverse through-girders, with one of the individual crawler gear elements being attached at each end of said transverse through-girders, and in that said chassis frame further comprises a centre section of the frame, which centre section interconnects the two transverse girders.

Abstract: A mobile crane has a rotating deck supported at an undercarriage at which a main boom and a derrick counter-boom are supported. A ballast weight is arranged at the arm of the rotating deck projecting in the direction of the counter-boom. The ballast weight is suspended at the counter-boom and can be raised from the rotating deck via a hoist rope in order to allow a swivelling of the unloaded crane without the counter-ballast having to be carried by a carriage following the swivel movement. The counter-boom is provided with luffing devices by which it can be slanted such that the ballast weight can approach the luffing axis of the counter-boom by so much that the overall center of gravity of the superstructure with the boom, counter-boom and set-ups lies inside a circle which maintains a safety distance to the tilting edges of the stabilizer base of the crane.

Abstract: The chassis of a mobile crane, which supports a revolving superstructure having a jib and a counter-jib, is detachably connected to lateral crawlers. To create a favourable stabilisation area for the crawler-mounted crane, cantilevering stabilisers are attachable to the outsides of the crawlers.

Abstract: The present invention is directed to a crane, preferably a derrick crane, having a traveling chassis (1), a revolving superstructure (2) mounted thereon in rotating fashion and connected with a ballast car (6) by a shaft (3) and on which a boom and a derrick, to which the ballast car (6) is connected, are mounted in luffing manner. The shaft (3) is in the form of a telescoping beam that can be telescoped to a length corresponding to the current load or that is longer than the same.

Abstract: A traveling crane including a telescoping boom whose individual telescopically extending boom members are able to be extended and retracted after the disengagement of locking bolt connections using one single stage hydraulic piston and cylinder unit. The boom members are bolted in the respective extended or retracted positions by locking bolts spring-loaded toward the locked setting thereof. The piston rod of the piston and cylinder unit is pivotally attached to the boom joint member terminating the inner end of the outer boom member. An entraining device, which is able to be coupled with a receiving member on the telescopically extending boom members, is arranged in a part of the end of the cylinder, from which the piston rod comes out of the cylinder.

Abstract: The invention relates to a mobile crane comprising a lower vehicle and an upper vehicle turningly mounted thereon and bearing a telescoping boom with a luffing cylinder for the pivoting thereof. The telescoping boom comprises two parts able to be bolted together and each having an external tube, from which respectively at least one telescope member may be extended.