Abstract: In a working vehicle of a type having an extremely small swing radius at the rear and a type having an extremely small swing radius, a rotation table frame, which is equipped with a working device and mounted on a traveling device, is to be standardized for increasing the productivity and reducing costs. In a swing working vehicle having a rotation table frame (5), a portion rearward of both sides of the rotation table frame being substantially within a width of a traveling device (3) and circular in a plan view, a front portion of the rotation table frame (5) is rectilinearly cut in a left-right direction in the plan view, and the rotation table frame (5) has a stepped portion (5c) formed at a right side relative to the advancement direction and recessed rearward.

Abstract: In a boom 15 for a working machine 10 attached to an upper rotational body 30 supported on a center of an upper portion of a crawler-type traveling device 40 to be transversely rotatable, the boom 15 includes, as portions cast by integral molding, a boom support point part 16, a boom cylinder rod support point part 18, and an arm support point part 19, and is configured so that the boom support point part 16 is connected to the boom cylinder rod support point part 18 by a general-purpose first rectangular pipe 61, and so that the boom cylinder rod support point part 18 is connected to the arm support point part 19 by a general-purpose second rectangular pipe 62.

Abstract: A mobile lift crane includes a carbody having moveable ground engaging members; a rotating bed rotatably connected to the carbody such that the rotating bed can swing with respect to the ground engaging members; a boom pivotally mounted on a front portion of the rotating bed and a mast mounted at its first end on the rotating bed and having a second end; and at least one hydraulic cylinder pivotally connected at a first end to the rotating bed. The hydraulic cylinder is positioned and configured so as to be able to raise the second end of the mast from the mast being in a near horizontal position to a position where the mast is used during crane pick, move and set operations. In a preferred embodiment, at least one arm is pivotally connected at a first end to the rotating bed and at a second end to the hydraulic cylinder. The arm and cylinder are connected together such that extension and retraction of a piston within the hydraulic cylinder causes the second end of the arm to raise and lower.

Abstract: A vessel is provided that is an improvement over previously disclosed jack-up rigs and lift boats. The vessel has at least three thrusters and is self-propelled. The vessel additionally has a raised and hollow crane support on which a crane may be mounted. The crane support is affixed to tracks, which permit the crane to slide along the deck of the vessel. The raised and hollowed feature of the crane support permits the storage of equipment and things beneath the crane support without hindering the movement of the crane along the tracks. Optionally, the vessel further comprises a sub-base structure removably affixed to the transom of the vessel; a base structure removably affixed to the sub-base structure; and a work-over rig removably affixed to the base structure. Also provided herein are methods of using the crane and affixing the sub-base structure, base structure, and work-over rig to the vessel's transom.

Abstract: A vessel is provided that is an improvement over previously disclosed jack-up rigs and lift boats. The vessel has at least three thrusters and is self-propelled. The vessel additionally has a raised and hollow crane support on which a crane may be mounted. The crane support is preferably affixed to tracks, which permit the crane to slide along the deck of the vessel. The raised and hollowed feature of the crane support permits the storage of equipment and things beneath the crane support without hindering the movement of the crane along the tracks. Optionally, the vessel further has an extension assembly atop which may be deployed a workover rig assembly. The crane may be used to assemble the extension assembly and thus aid in the construction, remediation, and demolition of offshore oil and gas platforms and wells.

Abstract: A method for mounting a wind turbine blade to a wind turbine hub by use of a crane boom is provided. The orientation of the blade is kept substantially horizontal when the blade is lifted off the ground and mounted to the rotor hub. Control wires which connect the blade via the crane boom to a winch arrangement are used for keeping the blade orientation substantially horizontal in addition to at least one bearing wire for bearing the blade weight.

Abstract: A device for positioning and supporting the cumbersome weight of an air or gas breathing plenum (hose), over a person's head during rest or sleep, to thereby increase free movement and reduce distress to the user. The device consisting essentially of a collapsible sectional tubular boom, supported by a planar wire form base captured by the weight of the user's mattress, and an elastic cord passing through the hollow interior of the tubing sections used to: capture the hose at the outboard end of the boom, keep the boom erect, affix the boom to the supporting base, and said elastic cord also to gather and order the collapsed boom sections during folded storage. Said device is particularly convenient for use with CPAP equipment used in the control of sleep apnea, as it is sized to fit within the travel bag of even the smallest of CPAP machines during travel away from home.

Abstract: The invention relates to a vehicle crane, especially a mobile crane, automobile crane, or track-laying crane, comprising a superstructure which is embodied as a top slewing crane and encompasses a vertical tower and a boom located on the tower

Abstract: A new boom rest has a cylindrical roller with a V-shaped groove cut into it such that the boom rests at least partially in the groove. The roller is rotatable and made of a self-lubricating resilient non-metallic material. The rotation and the V-shape allow the boom to self-locate onto the roller. The material of the roller and self-locating prevent damage and wear on the roller and the boom. The roller is rotatably mounted on a support structure that is attachable to vehicles that carry booms.

Abstract: A preferred embodiment of a lifting device includes a mounting column having a first major portion extending in a first direction, and a second major portion fixedly coupled to the first major portion and extending in a second direction. The lifting device also comprises a lifting arm rotatably mounted on the second major portion of the mounting column and having a first hole formed therein for receiving a pin, a bracket fixedly coupled to the second portion of the mounting column and having a second hole formed therein for receiving the pin so that the pin restrains the lifting arm from substantial rotation about the second major portion of the mounting column, and a retaining member secured to the second major portion of the mounting column so that the bracket and the retaining member restrain the lifting arm from substantial movement in the second direction.

Abstract: A hoist system can be used to raise articles. The hoist system can include a mounting structure attachable to a billboard structure, a pole member fastenable to a mounting structure and a winch assembly. The winch assembly has at least one component coupled to the pole. The winch assembly is capable of winding a flexible line. The hoist system can be utilized to raise and lower vinyls, other signage equipment or tools to billboard structures. The pole can be a single piece unit having a bend.

Abstract: A method for controlling a boom construction and a tool articulated thereto, said boom construction comprising a first boom and a first actuator controlling the same, a second boom articulated to the first boom, and a second actuator controlling the same, as well as a third actuator controlling the position of the tool, wherein in the method: the first actuator is controlled manually; and/or the second actuator is controlled manually and the third actuator is also controlled at the same time automatically to control the position of the tool. For example, the first actuator is controlled by means of a first set point; and/or the second actuator is controlled by means of a second set point; and in addition, the third actuator is controlled simultaneously by using for the control a variable dependent on at least one of said set points.

Abstract: A moisture shedding system for hollow boom (30) is disclosed. The system has at least one drainage aperture (38) in or adjacent a lower wall of the boom and a fluid director (45) is associated with the aperture for directing fluid on the inner surface of the lower wall to the aperture to allow fluid to be drained from the boom.

Abstract: A telescoping boom mechanism for deploying an expandable structure, such a hoop-supported antenna, comprises a plurality of concentrically nestable tubular boom sections, that are mutually engageable with one another by way of roller assemblies and helical tracks formed thereon. The tubular boom sections are caused to telescopically expand or retract along a deployment axis by means of a rotational drive motor coupled to an outermost one of the tubular boom sections.

Abstract: The within invention concerns a telescopic boom of a crane with a pivot section, telescoping sections that telescope out of the pivot section, and bracing that has at least one guy support housed on one of the sections and a guy cable supported on one of these guy supports. According to the invention, the telescopic crane is characterized by the presence of a guy cable running from the guy support and a cable lock that can be locked to said guy cable, in which the cable lock can be moved by means of an actuator, particularly an hydraulic cylinder, in the longitudinal direction of the guy and the guy cable can be pre-stressed by moving the cable lock.

Abstract: A hoist system can be used to raise articles. The hoist system can include a composite pole member having a bend, a mounting structure attachable to the composite pole member and a winch assembly. The winch assembly has at least one component attached to the pole. The winch assembly is capable of winding a flexible line. The hoist system can be utilized to raise and lower vinyls, other signage equipment or tools to billboard structures. The composite pole can be a single piece unit having a bend.

Abstract: The invention relates to a covering body for masts of construction cranes, electricity lines, or the like with an outer covering which is designed to partially or totally encase a mast in the direction of extension and/or peripheral direction and which furthermore has at least one rigid inner support, with which the outer covering can be arranged to be spaced at least partially at a distance from the mast. Finally, a fastening device for fastening the inner support to the mast is provided. Such a covering body according to the invention is further developed in that the inner support, by means of the fastening device, can be connected to the mast rotatably adjustable in the peripheral direction and/or adjustable in the direction of extension and that a device for active and/or passive variation of position and/or geometry of the outer covering is provided.

Abstract: For a lateral face of the lattice girder, defined by an upper chord and a lower chord, the triangulation comprises compression bars substantially perpendicular to the chords, oblique tension bars of smaller length connecting the top of a compression bar to the lower chord, and other oblique tension bars of greater length, also connecting the top of a compression bar to the lower chord, at a point located further ahead toward the base of the next compression bar. This triangulation is used, in particular, for the jib and counterjib elements of tower cranes.

Abstract: A support tower for large structures such as wind turbines generators, microwave structures, high voltage transmission lines or the like, constructed of telescopic sections with the lowermost section having an edge portion pivotally connected to a foundation to enable the tower sections to be transported to the site of installation. The tower sections are assembled at the installation site in a nested relationship, each within the adjacent lower tower section. The large load is mounted on the upper end of the uppermost tower section and the nested tower sections are then tilted upwardly to a vertical position. After the tower is tilted to its vertical position and securely connected to the foundation, the telescopic tower sections are vertically extended to position the load in a vertically elevated position.

Abstract: A telescopic crane, includes a substructure, a superstructure rotatably mounted onto the substructure, a counterweight and a telescoping boom structure which includes a main boom slewable about a luffing plane. The main boom has a boom base and at least one telescope section received in the boom base and displaceable between retracted and extended positions. At least one guy support is mounted to the boom structure and connected to a guy rope which extends substantially longitudinally in the direction of the boom structure. The guy support is oriented with respect to the luffing plane at an inclination which is so selected that a lateral load acting on the boom structure is partially or entirely received by the guying.

Abstract: The invention concerns a load lifting and handling appliance with articulated jib, capable of being raised and inclined, comprising a mast, a jib foot articulated in rotation at its first end (35) to the top of the mast (21, 22, 29), a fly jib (41) articulated in rotation at the second end (36, 37) of the jib foot, said fly jib comprising on either side of its hinge pin (45) to the fly jib foot respectively a fly jib point (43) and a counter fly jib (42, 49), a jib-retaining assembly comprising at least a king post (16) and a jib tie (25), and at least a double acting stick cylinder (3) linking the jib foot to the fly jib, determining the angle between jib foot and fly jib. The foot portion proximate to said second end and the counter fly jib having conjugated shapes enabling the fly jib point to be urged in aligned position with the jib foot. The lifting appliance may comprise a mobile counterweight system (113).

Abstract: The invention is directed to a ring lift crane with a liftable ring forming a circular traveling path and having a plurality of segments which can be connected to one another. Within the ring, there is arranged a chassis having a superstructure which is connected with the chassis so as to be rotatable and which has a plurality of winches. The superstructure is provided with an adapter in each of two oppositely located end areas, and the adapters are supported in a rolling manner on the circular traveling path of the ring by rollers which are arranged in the end area of the adapters.

Abstract: A self-propelled crane provides a possibility to lift the heavy and large-size loads and includes a mobile unit as a base unit, which carries a pivoting platform, a traverse, a boom, the bottom of which is by the hinge connected to the platform and the upper end of a boom is attached to a luffing arm. The upper end of the boom has the first hoist cable roller and another end of the luffing arm has the second hoist cable roller. The first hoist cable is connected to a crane hook mechanism.

Abstract: A member constituting a support-connecting portion with another support structural member is a cast member, and the cast member is integrally built up with a long member formed of a plate material so as to avoid stress concentration. In a long structural member for equipment including a connecting structural portion at a proximal portion, a proximal constitutive portion (6) including a boss (7) and a bracket (8), which are a connecting support portion at the proximal portion, is integrally formed of cast steel. The cast steel proximal constitutive portion (6) is connected and built up with a steel long portion (2) at a connected portion, and thereafter, are integrally welded together.

Abstract: A telescopic jib for a crane, such as a vehicular crane, comprises an upper profile part and a lower profile part joined together. The lower profile part consists of several shell segments, each having an outwardly curved shape, and the upper profile part comprises several outwardly curved shell segments abutting each other at an obtuse angle.

Abstract: The pipe-laying vehicle 1 includes a lower vehicle body 2, a driver's cab, and a jib 10 which is supported on the lower vehicle body 2, can be raised and lowered about a horizontal axis 11, and can be swivelled about a vertical pivot axis by a live ring. On the outer end of the jib 10, a sheave head 31 is provided with a deflection pulley 26 and a sheave 28, and can be swivelled as a whole relative to the jib 10 about an adjustment axis 32 that extends in the longitudinal direction of the jib 10. A mechanically or hydraulically actuated locking device selectively locks the pivot position of the sheave head 31 relative to the jib 10. As a result of the swivel capability of the jib 10 and of the sheave head 31, the pipe laying work can be performed more simply and quickly.

Abstract: A telescopic boom for crane, in particular mobile cranes, includes a base section and a plurality of boom sections received in the base section and telescopically extendible and retractable. The base section and the boom sections are each made of a profile comprised of an upper shell and a lower shell which are joined together at their confronting walls, with the upper shell having a nominal wall thickness which is equal or smaller than a nominal wall thickness of the lower shell. At least one portion of the upper and lower shells includes, as viewed in cross section, two outer thin metal sheets which are placed in spaced-apart relationship to define an intermediate space therebetween.

Abstract: A boom body (23) comprises a boom front member (20), a boom intermediate member (22) and a boom rear member (21). An arm-connection bracket (24) is jointed to the boom front member (20) and a vehicle body-mounting bracket (25) is jointed to the boom rear member (21), thereby forming a boom. With this structure, a cross section of the boom body (23) is less prone to be deformed and therefore, the plate thickness can be reduced, the rigidity of the boom body (23) can be increased without mounting a cross section restraint material and the cross section of the boom is not deformed. Therefore, it is possible to reduce the boom in weight.

Abstract: A winch spooled with a cable is provided for mounting on the boom of a host vehicle. The winch is surrounded by a frame housing that is capable of withstanding the forces applied by the host vehicle. A braking mechanism is provided for controlling the spooling and unspooling of the cable. The winch is mounted on the boom of a host vehicle by a conventional attachment that is used for other custom tools such as buckets of a backhoe.

Abstract: A boom control apparatus and method are disclosed for controlling a boom of a machine. The boom control apparatus includes a boom angle sensor, a boom length sensor, a chassis pitch angle sensor, a chassis roll angle sensor, and a control lever. All of the sensors generate signals associated with the values of their measured parameters. Movement of the control lever along a first axis generates a first pivot velocity signal for a desired pivot velocity of the boom. Movement of the control lever along a second axis generates a first telescoping velocity signal for a desired telescoping velocity of the boom. An electrohydraulic control module detects the signals from the sensors and the control lever. The electrohydraulic control module generates a second pivot velocity signal or a second telescoping velocity signal. The second signals are directly proportional to the first signals and inversely proportional to the signals generated by the sensors.

Abstract: A delimber having a standard carriage and a delimbing boom, the delimbing boom slidably mounted through the carriage. A drive module is detachably connected to the carriage for use in moving the boom relative to the carriage. Two different types of booms and up to three different drive modules, each with a different drive, can be provided. The boom and module selected to give the operating characteristics desired by the operator are connected to the carriage. Drive transfer members, in the form of cable or chain drives, are connected between the selected drive module and the selected boom. The module carries a variable displacement hydraulic motor. The motor is connected by a gear box to the drive transfer member. On delimbers using cable drives, at least one end of each cable is connected to the delimber with a hydraulic tensioner.

Abstract: A multi-position boom nose includes a support structure disposed at one end of a boom. The support structure supports at least a first sheave set, and the first sheave set includes at least one sheave. A pivot arm has a first end pivotally connected to the support structure. A second end of the pivot arm supports a second sheave set, and the second sheave set includes at least one sheave. The pivot arm has a first working position, a second working position and a stowed position. The pivot arm extends towards the boom in the stowed position. Specifically, the pivot arm extends into the boom in the stowed position. In the first working position, the pivot arm extends perpendicular to the boom. In the second working position, the pivot arm extends away from the boom, and the first sheave set supports a first load bearing member, while the second sheave set supports a second load bearing member.

Abstract: A winch spooled with a cable is provided for mounting on the boom of a host vehicle. The winch is surrounded by a frame housing that is capable of withstanding the forces applied by the host vehicle. A braking mechanism is provided for controlling the spooling and unspooling of the cable. The winch is mounted on the boom of a host vehicle by a conventional attachment that is used for other custom tools.

Abstract: A telescopic boom section for a mobile crane including an upper inverted U-shaped longitudinal section and a lower convexo-concave longitudinal section. The upper section and the lower section are welded to each other along the seams formed by the longitudinal edges of the upper and the lower sections such that the concave surface of the lower section and the U-shaped wall of the upper section defines a cavity therewithin. The lower section includes a plurality of arcuate segments disposed sequentially across the concave surface and which are formed by a cold roll die.

Abstract: An arm attachment for an arm of a backhoe. The arm attachment attaches directly to a shovel to permit large objects to be picked up. A boom includes a support portion resting against the shovel and an extending portion. A cross member extends transversely from the support portion and stabilizers extend from the cross member to the extending portion. A lifting assembly is attached to a free end of the extending portion.

Abstract: A swing type front working mechanism 7 is provided, the front working mechanism 7 having a foot portion of a lower boom 8L of a boom 8 pivotally supported on brackets 12a through a pin 18. A cross-link 40 is connected between the bracket 12a and an upper boom 8U by pins 41 and 42 only along the right lateral side of the boom 8, and no cross-link is provided on the side of an operator's cab 6. In the case of a singular cross-link arrangement of this sort, the boom 8 could be operated under biased load distribution, and therefore the lower boom 8L is likely to be subjected to greater stresses or greater lateral bending stresses on the side of the cross-link 40. A boom operating hydraulic cylinder 43 is located in a position which is shifted aside from a center axis A1 of the lower boom 8L in a direction away from the operator's cab 6, thereby forming a lateral load buffer as a counter measure which suppresses or buffers lateral bending stresses of the sort as mentioned above.

Abstract: A crane boom and luffing jib assembly have an offsetting link to allow the luffing jib to fold back and under the main boom for assembly of the boom and luffing jib assembly on a construction site where the entire length of the boom and luffing jib cannot be laid out during assembly.

Abstract: An apparatus and a method for controlling the operation of a reach tower crane, in which a horizontal boom can safely and securely be operated or stored by one operator in the cab, and in which even if sensors are out of order, the stability of the crane can be secured. The system has a plurality of sensors for detecting a condition of an actuator (6) actuating an apparatus to operate or store a horizontal boom (5), a controller (36) for sending a control signal based on signals from the sensors, and hydraulic apparatuses for controlling various actuators in accordance with the control signal. Further, an operation lever and an operation switch are used to extend or store the horizontal boom (5).

Abstract: An operating system for telescoping a telescopic boom for a crane, particularly a boom having three or more telescoping sections, enabling the boom to be extended and retracted automatically under load according to a predetermined sequence which optimises the load capacity of the boom and the stability of the crane. The boom may be switched rapidly between modes of operation in one of which all of the telescoping sections may extend or retract and in another of which at least one telescoping section is maintained in the fully retracted position.

Abstract: A jib pin alignment jack assembly for aligning the apertures on the proximate end of a jib with apertures on the nose assembly of a boom section to facilitate the manual insertion of pins therein for holding the jib in the operative position relative to the boom section. A manually actuated hydraulic jack is mounted on the underside of the jib at the proximate end thereof, and the jack saddle is extendable to push against the nose assembly on the boom section, to thereby align the apertures for insertion of pins therein. One person is able to not only actuate the hydraulic jack to align the apertures but also insert the pin in the aligned apertures.

Abstract: A chord protector employs a resilient covering affixed to an appropriate crane element, extension, lattice structure or headache ball, to protect a chord from damage during a collision with a headache ball or other weighty object. The chord protector can be constructed of a variety of materials. In one embodiment, the chord protector is constructed of high-impact plastic, and lined with an elastomeric or rubber material which in turn is fastened to a chord of the lattice section using a disengagable hook and loop fastener. Another embodiment includes an elastomeric covering on the headache ball.

Abstract: A crane boom top is disclosed in which a sheave assembly having a number of sheave sets is supported on the crane boom top by boom sheave supports. Each sheave set is mounted on an individual shaft and connectors connect the individual shafts to the boom sheave supports.

Abstract: A longitudinally divisible crane boom segment includes at least a first and a second section that are easily nested together for transport. The sections each include at least one chord member, at least one bracket attached to the section, and a plurality of partial lacing elements. Each partial lacing element has a first end permanently attached to the at least one chord member and a second end. The second end of at least one of the plurality of partial lacing elements of the first section is connectable to a bracket attached to the second section to hold the sections in a nested fashion.