Abstract: A stabilizer for a vehicle includes an actuator assembly configured to be coupled to a chassis of the vehicle and a ground pad coupled to the actuator assembly. The actuator assembly is selectively repositionable between an extended position and a retracted position to reconfigure the stabilizer between a lifting configuration and a storage configuration. The ground pad has a bottom surface configured to engage a support surface below the chassis. When the stabilizer is in the lifting configuration, the bottom surface of the ground pad engages the support surface. When the stabilizer is in the storage configuration, the ground pad is not in contact with the support surface.

Abstract: A vehicle includes a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, and a stability system. The stability system includes a pair of front downriggers coupled to the chassis forward of the front axle and an outrigger assembly coupled to the chassis between the front axle and the rear axle. The outrigger assembly includes a pair of outriggers that are selectively extendable laterally outward at an angle relative to a horizontal.

Abstract: An apparatus for retaining an upper pivoting body of a construction machine having a lower traveling body includes a protrusion on a lower surface of the upper pivoting body, a socket portion on an upper side of the lower traveling body that couples with the protrusion, an elastic member on a lower side of the socket portion that elastically supports the socket portion, a first tapered member on a lower side of the elastic member to support the elastic member, a lower surface of the first tapered member having a sloping surface, and a second tapered member on a lower side of the first tapered member. The upper surface of the second tapered member has a sloping surface that makes sliding contact with the first tapered member. The second tapered member lifts the socket portion, through a horizontal movement, to be coupled with the protrusion or lowers the socket portion to be separated from the protrusion.

Abstract: A safety device for a mobile crane has: a permitted work range setting unit that, in accordance with whether or not the overhang angle of each outrigger is a reference overhang angle and the overhang length is the maximum overhang length, sets the permitted work range/non-permitted work range of a crane boom; and a load-specific work range setting unit that, in accordance with whether or not each of the outriggers overhang lengths is a maximum overhang length, sets a maximum RTL work range which is a range, within the permitted work range, in which crane work at a maximum rated total load can be carried out. The crane work capacity on the side of the outrigger having the maximum hangover length with high supporting capacity can be fully utilized within a range over which safety can be ensured.

Abstract: A rotating tower crane for erecting a wind turbine, having a tower and a tower substructure, which is connected to the tower and is intended for supporting the tower, wherein the tower substructure has a supporting cross frame, which has three or more, preferably four, legs, extending from the tower. It is proposed that each leg has fastened on it, on the ground side, a load-distributor plate, which is not connected to the foundation, wherein the load-distributor plates together form the ballast of the tower.

Abstract: A fire apparatus includes a chassis, a body assembly, a front cabin, a front axle, at least one rear axle, a ladder assembly having a proximal end that is coupled to the chassis between the front axle and the at least one rear axle, a stability system, and a controller. The stability system includes a pair of front downriggers, a pair of rear downriggers, and an outrigger assembly coupled to the chassis between the front axle and the at least one rear axle. The front and rear downriggers are selectively extendable to engage a ground surface. The outrigger assembly includes a pair of outriggers that are selectively extendable from the body assembly to engage the ground surface. The controller is configured to facilitate controlling extension and retraction of the front downriggers, the rear downriggers, and the outriggers to lean the fire apparatus.

Abstract: A crane includes an under carriage, an upper carriage, a rotary connection, by means of which the upper carriage is connected with the under carriage to rotate around an axis of rotation, a jib to be connected with the crane and erected around a jib axis, and a device connecting the upper carriage with the under carriage with at least one force-transmitting element. The at least one force-transmitting element is designed passively in such a way that it transmits forces between the upper carriage and the under carriage when a pre-determined load condition of the rotary connection is reached.

Abstract: A cylinder retraction system causes a crawler side frame hoisting hydraulic cylinder, swingably suspended on a ventral surface side of a lower boom, to swing between a retracted attitude, in which the hydraulic cylinder is set along a ventral surface of the lower boom, and an operating attitude, in which the hydraulic cylinder is oriented along a vertical direction. As the rod of the hydraulic cylinder, currently having the operating attitude, is contracted by a predetermined extent, the rod front end of the hydraulic cylinder is guided by the guiding portion until the hydraulic cylinder takes on the retracted attitude. As the hydraulic cylinder, currently having the retracted attitude, is extended by a predetermined extent, engagement between the rod front end of the hydraulic cylinder and the guiding portion is released so as to allow the hydraulic cylinder to take on the operating attitude.

Abstract: A wrecker-type recovery vehicle for recovering other, disabled vehicles, and a method for doing so, which may use a CAN Bus, and which may employ wrecker controls located a distance from a side surface of the vehicle exterior. Traveler rollers may be used to facilitate longitudinal movement of a travel base assembly supporting the boom, relative to the vehicle frame.

Abstract: A locking device for supporting members for a mobile machine, which supporting members are arranged on a chassis or load-bearing frame and can be extended, pivoted or telescoped from a retracted transport position into a deployed working position, has a locking bolt which can be displaced between a locked position and an unlocked position in a guide sleeve which is fixed to the frame and is arranged transversely with respect to the pulling-out direction of the supporting member, which locking bolt is prestressed in the direction of the locked position under the action of a spring, has an actuating member which displaces the locking bolt between the locked position and the unlocked position, and has a latching and guiding member for the locking bolt, which latching and guiding member is arranged rigidly on the supporting member, wherein the latching and guiding member has a guiding curve which pushes the locking bolt into a release slope, and wherein the locking bolt can be moved in the release slope automatic

Abstract: A working vehicle configured to raise and lower one of a jib and a boom by using a wire rope wound around a winch, the working vehicle includes: a detection part provided on one of the jib and the boom and configured to detect an angle of one of the jib and the boom controlled to be raised and lowered to determine whether or not an overload detection condition occurs or to perform overload prevention control; an acquisition part configured to acquire the angle of one of the jib and the boom controlled to be raised and lowered, based on a feed length of the wire rope; and a determination part configured to determine that a failure occurs when a difference between the angle detected by the detection part and the angle acquired by the acquisition part exceeds a predetermined tolerance.

Abstract: A support device for a mobile lifting machine, in particular a vehicle crane, comprises a carrier support coupled to the vehicle chassis, a piston rod coupled to the carrier support and movable relative to the carrier support, and a support disc coupled to the piston rod, wherein the support device is configured such that it allows a movement of the support disc relative to the carrier support in a direction perpendicular to the longitudinal axis (L) of the piston rod.

Abstract: A user-friendly crane mat carrier is provided for conveniently transporting, storing and supporting crane mats, pads and other items. The economical light weight crane mat assembly can comprise a frame assembly with a main load-supporting bar, crossbars and perimeter bars. The special crane mat carrier can be easily connected to a crane, such as with a drawbar fixture, securing plate and locking plate. A hanger assembly with a suspension bar can be provided to hang the crane mat carrier. A latch mechanism can also be provided to securely lock the crane mat carrier.

Abstract: A new rough terrain crane has an exhaust emission control device that has a DOC, a DRT, and a SCR. The DOC and the DRT are connected in series and disposed along a longitudinal direction of a vehicle. A rear end of the DOC is positioned at the front side relative to a rear end of an engine. The SCR is disposed in parallel to the DOC and both devices are disposed above a support member of a rear outrigger. The SCR is disposed on the upper side relative to the DOC at a position close to the engine.

Abstract: An access system for facilitating access to an elevated deck of a mobile crane includes a staircase having a support post defining an axis of inclination. A plurality of ascending steps is connected to the at least one support post, and a mounting bracket is pivotally coupled to an upper end of the at least one support post. The staircase is pivotable about a longitudinal axis such that a lower end of the at least one support post is induced to move in a lateral direction in response to pivotal motion of the at least one support post. A caster is coupled to the lower end of the support post for supporting the staircase on a ground surface. The caster supports the staircase on the ground surface throughout longitudinal movements of the staircase and lateral movements of the staircase induced by vertical movements of the mobile crane.

Abstract: An extendable beam measurement system includes a support; a beam mounted on the support and movable with respect to the support along an axis of movement; a series of sensory points mounted along either the beam or the support in an orientation that is not parallel to the axis of movement of the beam; and a sensor attached to the other of the beam or the support in a direction that crosses the series of sensory points at different positions during movement of the beam along said axis. The sensor generates a first signal varying as the beam is moved along the axis to thereby provide a signal indicating the position of the beam with respect to the support. The system is useful on an outrigger for supporting a crane. Optionally the system can provide a second signal indicative of whether a jack on the outrigger is contacting a support surface and supporting the crane.

Abstract: The present application relates to a mobile crane comprising a telescopic boom which has a hinged section and at least one telescopic section which can be telescoped out of it, or to a crawler-mounted crane. In accordance with one embodiment, as a position detection device, it has at least one transducer in the form of an inductively operating transponder, a receiver unit for the sensing of the position of the transducer, a control device for control in dependence on a signal of the receiver unit, as well as a signal transmission device in the form of a databus for the transmission of the signal data from the receiver unit to the control device.

Abstract: An outrigger pad monitoring system for determining crane stability includes a plurality of outriggers having sensors for measuring a load placed on the outriggers. A crane control system utilizes the measured load on the outriggers to determine the stability of the crane. A crane control system utilizes the measured load on the outriggers with positional information for the crane boom to determine if the crane boom is in a side-load condition. The outrigger pad monitoring system may be used during the setup of the crane and to verify the proper operation of a rated capacity limiter.

Abstract: The invention relates to a crawler crane comprising two crawler supports (9) with rotating crawlers (8). Both crawler supports (9) are connected by a transversal bridge (10). A superstructure (3) of the crawler crane comprises at least one crane jib that can pivot about a vertical axis and is connected to the transversal bridge (10). A pivotable articulation connects the transversal bridge (19) in a pivotable manner to the crane superstructure (3). At least one of the crawler supports (9) is connected to the transversal bridge (10) by means of a double link (11). A lower link (12) of the double link (11) is articulated on the crawler support (9) by means of a crawler support lower pivotable axis (13) and on the transversal bridge (10) by means of a transversal bridge lower pivotable axis (14).

Abstract: A user-friendly crane mat carrier is provided for conveniently transporting, storing and supporting crane mats, pads and other items. The economical light weight crane mat assembly can comprise a frame assembly with a main load-supporting bar, crossbars and perimeter bars. The special crane mat carrier can be easily connected to a crane, such as with a drawbar fixture, securing plate and locking plate. A hanger assembly with a suspension bar can be provided to hang the crane mat carrier. A latch mechanism can also be provided to securely lock the crane mat carrier.

Abstract: A mobile crane includes an undercarriage with a middle section and two parallel crawler carriages; a superstructure on which a boom is mounted, the superstructure being connected to the undercarriage by a rotary joint; two longitudinal outriggers connected to the undercarriage and extending in the longitudinal direction between the crawler carriages; and two transverse outriggers connected to the undercarriage and extending outside the crawler carriages. One of the longitudinal outriggers has an end with a transverse beam supported by spaced apart outrigger cylinders which provide an extended tipping edge to further stabilize the crane.

Abstract: The invention relates to a mobile working machine, particularly an automatic concrete pump, having a chassis (10) designed as a tractor-trailer. The tractor-trailer comprises a tractor (12) and a multi-axle semi-trailer (14) supporting the working machine and connected to the tractor by means of a fifth wheel (16). A support construction (38) that can be supported on a surface (40) is located in the area of the semi-trailer (14). The support construction (38) comprises two front stabilizers (42?, 42?) and two rearward stabilizers (44), each pivotable between a transport position and at least one support position relative to the semi-trailer. Means for raising and securing the tractor (12) are further disposed on the semi-trailer (14), so that the tractor (12) forms a ballast weight for stabilizing the semi-trailer supported by the support construction (38) on the base (40) in the support position.

Abstract: An extendable beam measurement system includes a support; a beam mounted on the support and movable with respect to the support along an axis of movement; a series of sensory points mounted along either the beam or the support in an orientation that is not parallel to the axis of movement of the beam; and a sensor attached to the other of the beam or the support in a direction that crosses the series of sensory points at different positions during movement of the beam along said axis. The sensor generates a first signal varying as the beam is moved along the axis to thereby provide a signal indicating the position of the beam with respect to the support. The system is useful on an outrigger for supporting a crane. Optionally the system can provide a second signal indicative of whether a jack on the outrigger is contacting a support surface and supporting the crane.

Abstract: A support device for use in a walking machine including a frame-like base connected to a chassis, sheath tubes fixed on the frame-like base, extensible arms provided in the sheath tubes, support parts provided on outward ends of the extensible arms and extensible perpendicularly, wherein, the sheath tubes are arranged in double X-form, one pair of sheathe tubes arranged diagonally are parallel and at same height, another pair of the sheath tubes that are arranged diagonally and are also parallel and at a same height are at a different height from the pair of the sheath tubes.

Abstract: A mobile crane includes an undercarriage with a middle section and two parallel crawler carriages; a superstructure on which a boom is mounted, the superstructure being connected to the undercarriage by a rotary joint; two longitudinal outriggers connected to the undercarriage and extending in the longitudinal direction between the crawler carriages; and two transverse outriggers connected to the undercarriage and extending outside the crawler carriages. One of the longitudinal outriggers has an end with a transverse beam supported by spaced apart outrigger cylinders which provide an extended tipping edge to further stabilize the crane.

Abstract: A boom truck with splayed forward stabilizers which permits loads to be lifted over the front of the vehicle without a central front jack and further having a pair of rear stabilizers which are separated from the splayed forward stabilizers along a substantial length of and near the rear end of the vehicle frame. The boom truck being made in a process where the attachment of the rear stabilizers is done in a separate and distinct process from the attachment of the splayed forward stabilizers.

Abstract: The safety guard mechanism for a lifting device is a mechanism that can automatically deploy a safety guard pivotally mounted to the lower surface of the frame of a portable aerial lift device when the lift is raised. By lowering the guard member, the distance between the lower surface of the base and the ground is decreased. The helical screw-based mechanical device includes a mechanical translator coupled with a rotator, the entire assembly interconnecting the guard member and a scissors-type lift so that raising the lift drives the lowering of the guard member. In the lowered position, the guard prevents tipping of the lift should one or more wheels enter a pothole or other depression. A helical screw latch is included to provide a self-locking feature.

Abstract: A mobile crane includes an undercarriage with a middle section and two parallel crawler carriages; a superstructure on which a boom is mounted, the superstructure being connected to the undercarriage by a rotary joint; two longitudinal outriggers connected to the undercarriage and extending in the longitudinal direction between the crawler carriages; and two transverse outriggers connected to the undercarriage and extending outside the crawler carriages. One of the longitudinal outriggers has an end with a transverse beam supported by spaced apart outrigger cylinders which provide an extended tipping edge to further stabilize the crane.

Abstract: An all terrain vehicle having a vehicle frame with a boom frame attached to the vehicle frame, a saddle nest attached to the boom frame, a pivot saddle respectively secured to the boom frame, a telescoping boom secured in the pivot saddle, the pivot saddle comprising a post disposed adjacent and parallel to the telescoping boom, a locking sleeve slidably mounted on the post, and a latch formed on the vehicle frame with the locking sleeve and latch adapted to interlock to maintain the telescoping boom in an upright position.

Abstract: A material-handler adapted for locating on top of an open topped railroad car includes a chassis mounted on tracks, and a first and second pair of outriggers extending from the chassis. Wheels and clamps are located at the distal ends of the outriggers to stabilize the material handler on the top of the railroad car. A knuckle boom is rotatably mounted on the chassis for manipulating cargo materials. The material handler of the invention also utilizes the clamps and wheels on the outriggers in conjunction with the boom to self-load and self-unload the material handler to and from the top of a railroad car, and to and from one care to another with possible different height and width. Operator safety is enhanced by allowing the operator to control the self-loading and unloading via remote control.

Abstract: A slat replacement machine having an elongated rectangular frame supported at each end by a tracked drive unit which provides zero turn capability to the machine. A pair of outrigger assemblies is provided at the forward end of the frame and a pair of outrigger assemblies is provided at the rearward side of the frame. The outrigger assemblies may be pivotally moved from a stowed position adjacent the frame to an outwardly extending position. A telescopic boom is pivotally mounted on the upper end of a rotatable pedestal which extends upwardly from the center of the frame. Various components of the machine such as hydraulic cylinders and hydraulic motors are radio controlled.

Abstract: A portable crane and trailer system is disclosed. In a particular embodiment, the system includes a trailer, a crane post, and a crane. A first pair of outriggers is secured to a rear portion of the trailer and a second pair of outriggers is configured to be swung out rearward from the trailer to further increase the stability of the trailer, where the second pair of outriggers is deployed at approximately a 45 degree angle relative to the trailer. In addition, the system includes a removable A-frame removably connected between the rear portion of the trailer and the boom, where a first end of the A-frame is mounted to the rear portion of the trailer forming a base of the A-frame and a second end of the A-frame is connected at approximately the same location on the boom forming an apex of the A-frame.

Abstract: A conversion kit for converting a pipelayer frame of a first width to a different width is disclosed. The conversion kit has a spacer, removably attachable to a first side of the pipelayer frame, and a first plurality of replacement brackets for removably attaching the first side to a first track frame. The first plurality of replacement brackets have a different length than a first plurality of existing brackets that the first plurality of replacement brackets replace. The kit also has a second plurality of replacement brackets for removably attaching a second side of the pipelayer frame to a second track frame. The second plurality of replacement brackets have a different length than a second plurality of existing brackets that the second plurality of replacement brackets replace.

Abstract: The invention relates to a supporting bracket (38) of a supporting construction for mobile machine tools, especially for concrete pumps. The supporting bracket (38) is multi-telescopic and comprises a carriage (38) which is pivotably arranged on the chassis (10), and a telescopic part consisting of a plurality of telescopic segments (40?, 40?, 40??) which are guided inside each other, engage in the carriage, and are mobile in relation thereto. The aim of the invention is to provide a narrow support using simple means. To this end, the carriage (38) and at least some of the telescopic segments (40?, 40??) have coupling points (50?, 50?, 50??) on which the segments can be coupled in pairs in such a way as to produce a fixed connection when the segments are retracted in relation to each other.

Abstract: A mobile crane includes an undercarriage with a middle section and two parallel crawler carriages; a superstructure on which a boom is mounted, the superstructure being connected to the undercarriage by a rotary joint; two longitudinal outriggers connected to the undercarriage and extending in the longitudinal direction between the crawler carriages; and two transverse outriggers connected to the undercarriage and extending outside the crawler carriages. One of the longitudinal outriggers has an end with a transverse beam supported by spaced apart outrigger cylinders which provide an extended tipping edge to further stabilize the crane.

Abstract: A backhoe for quick connection to an end of an all-terrain vehicle (ATV) is described. A quick-connector mechanism is secured to a main mounting frame of the backhoe for securement to attaching components of an ATV. The backhoe has a pair of adjustable telescopic legs and a pivoting boom assembly, as is common with such apparatus. The pivoting boom assembly is connected to the main mounting frame of the backhoe by a piston operated pivoting mechanism for 180° lateral displacement of the boom assembly. The pivoting mechanism is comprised of a toothed sprocket secured to a vertical pivot connection at an attaching end of the boom assembly and fixedly secured to the main mounting frame. A sliding rack is provide with a series of teeth in toothed engagement with the toothed sprocket and secured for axial displacement by a fluid operated cylinder to cause the sprocket to turn and cause rotation of the pivot connection to thereby rotate the boom assembly within an arc of 180°.

Abstract: A control system for a work machine. The control system allows an operator to selectively maintain control of a ground drive, a work tool, or both the ground drive and the work tool. The system provides a foot pedal movable between multiple positions. The foot pedal allows an operator to selectively hold the position of one or both of the ground drive control and work tool control. When the foot pedal is in a first position, the work tool control and ground drive control are not affected. When the foot pedal is in a second position, the position of the work tool control is maintained, while the ground drive control is not affected. When the foot pedal is in a third position, the position of the work tool control is maintained and the position of the ground drive control is maintained. A work tool control lock is used to prevent the work tool control from engaging when the foot pedal is in the second position or the third position.

Abstract: The present invention relates to a stabilizer support system and a method for stabilizing or supporting heavy equipment in general. The system may comprise a support structure such as a conventional A-frame that is configured to support a crane or heavy equipment. The system and method are designed to provide an adapter to support the structure by distributing weight and load onto, for example, a rail or similar transportation system while still allowing movement of the structure along the rails or other transportation system.

Abstract: The invention pertains to a traveling crane consisting of a superstructure that can be turned about an upright axis and carries a crane jib with hoisting means, a truck with a tracklaying gear that carries the superstructure and a supporting device with several outriggers that can be raised and lowered, wherein the superstructure as well as the truck can be turned relative to the supporting device about an upright axis.

Abstract: In a vehicle with a superstructure having at least one swiveling mast on a slewing gear and a frame support with the aid of front and back movable telescopes disposed on each side of the long sides of the vehicle, their stationary telescopes being disposed at least partly in an arc tangentially to the longitudinal direction of the vehicle and extending in each case from one of the long sides of the vehicle profile inward substantially as far as the middle of the vehicle and then on to the same long side of the vehicle profile, it is provided according to the invention that the stationary telescopes of the front and back movable telescopes of each long side of the vehicle are realized with a common carrier and disposed one behind the other such that the movable telescopes emerge from the associated ends of the carriers.

Abstract: A mobile concrete pump including a chassis (10), a rotating gear (14) for a distributing boom which is mounted onto said chassis, a pump assembly and a supporting construction (20). The supporting construction comprises two arc-shaped telescopic guides (32) for arc-shaped support arms (22) that can be retracted into the chassis and extended obliquely outwards in front. The telescopic guides (32) cross each other on different horizontal planes. Their geometric centers of curvature (36) are mirror-symmetrical in relation to the longitudinal axis (38) of the chassis and lie at a lateral distance from the edges of the longitudinal sides outside said chassis (10), behind an imaginary connecting line drawn between the rear ends (42) of the telescopic guides (32). The inventive supporting construction (20) permits large construction stances to be achieved with simple means, said stances also being suitable for distributing booms in the 50 m class.

Abstract: A work vehicle is provided with an articulated frame having a first frame segment and a second frame segment that are pivotally coupled to one another by a vertical pivot. An actuator is coupled to the frame segments for articulating the segments relative to one another to steer the vehicle. Each frame segment is provided with ground engaging wheels which support the respective frame segments. A work implement in the form of a backhoe is mounted to the second frame segment. A stabilizer having two stabilizer arms is mounted to the first frame segment. The stabilizer arms have a work position and a transport position. In its work position the stabilizer arms are lowered and the ground engaging wheels of the second frame segment are lifted off the ground. The actuator for steering the vehicle can then be used to pivot the backhoe about a vertical axis defined by the vertical pivot.

Abstract: An outrigger assembly for support of a mobile crane or excavator upon the ground, includes a plurality of outriggers mounted to a vehicle frame and having free ends, wherein each of the outriggers has a ground-engaging pad connected to the free ends for vertical movement in relation to the ground. Each of the outriggers has at least one outrigger arm unit movable with respect to the vehicle frame between an idle position suitable for travel between sites, and an operative position suitable for support on the ground, wherein the outrigger arm unit includes an outrigger arm made of a hollow profile which has a lower part of U-shaped configuration and an upper part of calotte-shaped configuration.

Abstract: A mobile crane includes a chassis having first connection features located on a rear end thereof. An outrigger includes second connection features for mating with the first connection features. A tag axle assembly includes third connection features for mating with the first connection features. The first connection features may accept either the second connection features or the third connection features, so that the mobile crane may be selectively configured for highway travel and selectively configured for working operation. One or more axles of the mobile crane may be elevated when the tag axle assembly is connected to the first connection feature. Further, a wheeled boom dolly may be employed to share weight with the chassis when the mobile crane is travelling.

Abstract: A telehandler crane apparatus and method is provided. More particularly, the present invention relates to a mobile apparatus adaptable for use as a crane and as a telehandler, and an associated method. The telehandler crane includes a telehandler frame, an outrigger assembly engaged with the telehandler frame, a rotating assembly engaged with the telehandler frame adapted for rotating 360 degrees, and a boom engaged with the rotating assembly such that the boom can be rotated 360 by the rotating assembly. Further, the telehandler crane apparatus of the present invention can be operated remote from the telehandler crane apparatus by the operator using a remote docking base.

Abstract: An outrigger assembly for support of a mobile crane or excavator upon the ground, includes a plurality of outriggers mounted to a vehicle frame and having free ends, wherein each of the outriggers has a ground-engaging pad connected to the free ends for vertical movement in relation to the ground. Each of the outriggers has at least one outrigger arm unit movable with respect to the vehicle frame between an idle position suitable for travel between sites, and an operative position suitable for support on the ground, wherein the outrigger arm unit includes an outrigger arm made of a hollow profile which has a lower part of U-shaped configuration and an upper part of calotte-shaped configuration.

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: A vehicle crane with four supports, which are hinged to the vehicle frame and which can be swung out, and with a rotating deck, which is mounted on said vehicle frame, is provided with swivel bearings for a main boom and a derrick counterboom. In order to transport the vehicle crane in a simple manner from one work site to another and to erect it easily at the respective work site so that it is ready to operate, a counterboom foot piece, which can be set down on the vehicle during transport and to which a counterboom headpiece can be coupled, is connected to the rotating deck.

Abstract: A crane vehicle is provided with a four-point support comprising outer support members which extend transversely to a longitudinal axis of the vehicle frame and which are supported directly by the vehicle frame. Extendable inner support members are displaceably supported by the outer support members, with each of the free ends of the inner support members having a support cylinder attached to it.

Abstract: A mobile work machine, especially an automatic concrete pump. The mobile work machine is arranged on a chassis (10) which has at least one preferably horizontally arranged telescopic segment (18) configured as a sliding housing, as well as a supporting strut (20) displaceable in said telescopic segment between a stowed transporting position and at least one extended position, the supporting strut supportable on the ground (28) via a foot element (26). In order to enable easy adjustment of the supporting strut width, it is proposed in accordance with the invention that the telescopic segment (18) consists of an inner segment part (44) fixed to the chassis and an outer segment part (48) which can be limitedly pivoted around an axis (46) parallel to the vertical axis of the chassis.