Abstract: A telescoping jib of a mobile crane includes sections that telescope out of a jib housing from a transport position into an operating position. A guying system has successively connected tension rods extending from the jib housing to at least one of the extended telescoping jibs by at least one guying support. The mobile crane provides a lighter construction and improved road handling, and an increased load capacity for unchanged telescoping jib measurements. To this end, a guide holder arranged on the jib housing receives the tension rods in the transport position and, in the operating position, at least one movable tension rod on one of the guying supports is respectively securely connected to the outer end of a telescoping section head in an articulated manner and can be secured to a holding mechanism on the opposite end on an adjacent guying support of an adjacent telescoping section head.

Abstract: An adjustable wear pad with a wear indicator preferably includes a wear pad, a push plate, at least two pushing fasteners, at least two retention fasteners and at least two threaded inserts. The at least two threaded inserts are retained in the wear pad. Each threaded insert threadably receives one of the retention fasteners. The push plate preferably includes a plate member, a hook extension and at least one wear sensor. The hook extension extends from one end of the plate member and the pair of wear sensors extend from an opposing end thereof. A hook pocket is formed in an end of the wear pad to receive the hook extension. At least two retention clearance holes are formed through the plate member. The adjustable wear pad is retained on a stationary structure and the wear pad is in contact with a moving structure.

Abstract: A construction vehicle includes a telescoping boom assembly that includes a first section and at least a second section configured to nest within and to extend from the first section. At least one wear pad is positioned between the first section and the second section. The wear pad includes a length, a first surface, and a second surface spaced apart a height from the first surface. A first portion of the wear pad includes a first bending stiffness. The wear pad also includes a second portion having a second bending stiffness, wherein the second bending stiffness is different than the first bending stiffness. Optionally, the height of the wear pad between the first surface and the second surface is substantially the same in the first portion and the second portion. Optionally, the construction vehicle is a crane.

Abstract: This disclosure relates to a wear button or pad for a telescoping boom of the type comprising at least an outer boom member comprising a threaded bore therethrough for the wear pad assembly, and an inner boom member that is slidable with respect to the outer boom member. In one form, the wear pad assembly comprises a wear pad and a base, a first of which comprises a generally cylindrical body comprising a curved external side surface comprising a screw thread via which this is threadably engageable in the threaded bore, and an internally tapered expandable collet, and the second of which comprises an externally and complementarily tapered mandrel portion, wherein in use, the externally threaded part is threadably engaged in the threaded bore and expanded therein by insertion of the externally and complementarily tapered mandrel portion in the expandable collet.

Abstract: An extendable strut assembly comprises a nested series of square or rectangular beams, the centermost of which may be a solid bar and all others are hollow sections. Glide strips of predetermined thicknesses take up the clearances between the beams and can be affixed to the beams by adhesive, so that beam surfaces run smoothly on the glide strips and the strut assembly can be extended and retracted with ease.

Abstract: The overhanging storage mechanism for a jib is provided with: a guide roller (31) and a pin socket (45) that are provided to a jib (15); and a guide (32) and a jib-fixing pin (43) that are provided to a base end boom (14a). The guide (32) comprises a first raceway surface (34s) that pulls the jib (15) toward the bottom surface of the base end boom (14a) as a result of rolling of the guide roller (31), a second raceway surface (35s) on which the jib (15) moves along the base end boom (14a), and a protruding third raceway surface (36s) that protrudes from the second raceway surface (35s). The jib (15) is pulled further toward the bottom surface of the base end boom (14a) by rolling of the guide roller (31) on the third raceway surface (36s).

Abstract: A telescopic handling device includes at least two elements (1, 2) mounted so as to slide relative to one another with interposition of sliding shoes (3, 4). The device includes thinner holding elements (5, 6) for the sliding shoes so as to limit the separation between two sliding elements to the thickness of the interposed sliding shoes (3, 4).

Abstract: In one aspect of the invention, a telescopic boom includes a plurality of boom sections, and a sheave assembly disposed between two adjacent boom sections. The sheave assembly includes two sheave assembly sets. Each sheave assembly set includes a plurality of sheaves having different diameters. The plurality of sheaves is arranged abreast along a lengthwise direction of the adjacent boom sections and the diameters of the plurality of sheaves increase successively along the lengthwise direction of the adjacent boom sections. Each sheave is wound with one or more cables. The invention also discloses engineering machinery having the telescopic boom.

Abstract: A track roller assembly for supporting telescoping boom sections of aerial devices. The track roller assembly is positioned in an interior channel of a hollow first boom section. The track roller assembly supports a majority of the weight of a second boom section and facilitates the second boom section telescoping in and out of the first boom section. The track roller assembly comprises a bracket to securely couple the track roller assembly to the interior channel of the first boom section, a plurality of rollers rotatably connected to the bracket, and a continuous track engaging the plurality of rollers on an interior surface and adjacent to the second boom section on an exterior surface.

Abstract: A telescoping mast with a cable system configured to secure the cable within the space between mast sections, wherein in the stowed configuration, the cable has an expanded zigzag arrangement, and in the deployed configuration, the cable has a compressed zigzag arrangement.

Abstract: A telescopic hydraulic cylinder includes an inner cylindrical tube and an outer cylindrical tube located concentrically about the inner cylindrical tube, and a guide ring for guiding the inner and outer cylindrical tubes. The guide ring has a cylindrical support surface with a center line and a guide surface and is mounted in a cylindrical groove. The guide surface slides along the inner surface of the outer cylindrical tube or the outer surface of the inner cylindrical tube. The guide surface has a curved surface with a curve radius and a tangent and the tangent to the curved surface and the center line form an inclination angle between zero and five degrees, and the curve radius is larger than the radius of the guide ring in the plane perpendicular to the center line.

Abstract: An extruded mast section for a telescoping tower includes a hollow extrusion having an exterior surface and an interior surface, and a plurality of spaced apart axially aligned internal screw bosses running the length of the mast section. A telescoping tower assembly includes a first extruded mast section having an exterior surface and an interior surface and a plurality of spaced apart axially aligned internal screw bosses running the length of the first mast section along the interior surface. A second extruded mast section disposed within the first mast section has a plurality of spaced apart axially aligned internal screw bosses running the length of the second mast section along the interior surface. Support collars are disposed at the top and bottom ends of the second mast section each having keyways disposed around its outer perimeter and aligned with a different one of the screw bosses of the first extruded mast section.

Abstract: The invention relates to a collar bearing for a telescopic boom for the sliding support of two telescopic sections in the collar region of the outer telescopic section, wherein the collar bearing includes fixing means, whereby the collar bearing selectively is releasably connectable with the outer or inner telescopic section.

Abstract: A crane jib system having a main jib, an auxiliary jib, and a telescoping cylinder. The main jib is comprised of main telescoping portions and the auxiliary jib is attached to the main jib and comprises auxiliary telescoping portions. The telescoping cylinder has a first telescopic part locking unit disposed on a base portion of the telescoping cylinder. The first telescopic locking unit is adapted to selectively engage the main telescoping portions. A second telescopic part locking unit is disposed on the telescoping cylinder above the first telescopic part locking unit. The second telescopic part locking unit is adapted to selectively engage the auxiliary telescoping portions.

Abstract: A boom assembly includes a first boom member and a second boom member slidable relative to the first member in a first direction. A stop member that at least partially defines a receptacle is attached to the first member. A closure member is attachable to the first member in a fixed position and movable away from the fixed position. A planar wearpad is insertable into the receptacle in the first direction when the closure member is moved away from the fixed position and the second member is positioned on the first member. The stop and closure members inhibit lateral movement of the wearpad in a direction parallel to the plane of the wearpad, and allow movement of the wearpad in a direction transverse to the plane, when the wearpad is positioned in the receptacle. The second member inhibits movement of the wearpad in the direction transverse to the plane.

Abstract: A telescoping structure includes a hollow outer section and a hollow inner section slidably mounted in the hollow outer section. The hollow outer section includes a first sidewall, a second sidewall and a third sidewall. The hollow inner section includes a fourth sidewall, a fifth sidewall and a sixth sidewall. A pair of sliding rails is disposed on the interior side of the first sidewall and a pair of raised sliding grooves is defined on the exterior side of the fourth sidewall. The pair of raised sliding grooves engages with the pair of sliding rails to enable a sliding movement of the hollow inner section relative to the hollow outer section.

Abstract: A telescopic boom broadly comprises an elongated hollow outer boom, an elongated inner boom telescopically received within the outer boom, and a guidance structure for guiding the inner boom for telescopic movement is provided. The guidance structure includes a plurality of guide rails attached to the interior corners of the outer boom, a first roller assembly attached to one end of the inner boom, a second roller assembly attached to one end of the outer boom, and a mid roller assembly positioned proximal to the second roller assembly. The first roller assembly includes a plurality of wheels mounted on axles for engaging the guide rails. The second roller assembly includes roller bars positioned on opposed sides of one end of the outer boom for guiding the inner boom during telescopic movement. The mid roller assembly includes a third roller bar that engages guide rails positioned on the inner boom.

Abstract: A telescopic boom broadly comprises an elongated hollow outer boom, an elongated inner boom telescopically received within the outer boom, and a guidance structure for guiding the inner boom for telescopic movement is provided. The guidance structure includes a plurality of guide rails attached to the interior corners of the outer boom, a first roller assembly attached to one end of the inner boom, a second roller assembly attached to one end of the outer boom, and a mid roller assembly positioned proximal to the second roller assembly. The first roller assembly includes a plurality of wheels mounted on axles for engaging the guide rails. The second roller assembly includes a pair of roller bars positioned on opposed sides of one end of the outer boom for guiding the inner boom during telescopic movement. The mid roller assembly includes a third roller bar that engages guide rails positioned on the inner boom.

Abstract: The present invention relates to a boom element for a telescopic boom, particularly a telescopic shot or a telescopic boom base section, wherein the boom element has cupped corner pieces and lattice bars, and the cupped corner pieces are interconnected by means of the lattice bars, wherein the lattice bars are arranged in a framework, at a right angle with respect to the corner pieces, and/or at an angle different from a right angle, particularly at an acute or obtuse angle, with respect to the corner pieces, and the corner pieces and the lattice bars form a substantially box-shaped hollow structure.

Abstract: A telescopic crane boom including a plurality of telescopically assembled tubular box sections including a base box section and an innermost box section having an open cross-section, and a boom head with a frame fixed to the outside circumference of the innermost box section. The head has a plurality of deflecting pulleys mounted on the frame, but no part extending inside the open cross section on the innermost base box section, whereby at least one additional box section can be inserted into the innermost box section in order to extend the boom.

Abstract: A clamping apparatus includes a frame and a pair of opposing clamping arms mounted on the frame for movement towards and away from each other to grasp or release a load. In one embodiment, each clamping arm is guided for movement with respect to the frame by an adjustable bushing which can be rotated to adjust the position of the bushing with respect to the clamping arm. In another embodiment, each clamping arm defines a four-bar linkage which controls the angle with respect to the vertical of a contact portion of the clamping arm. The clamping apparatus may be mounted on a lift truck or other support member by a connector which permits the angle of the clamping apparatus with respect to the horizontal to be adjusted and which enables the clamping apparatus to pivot about an axis between a position in which it is disposed outboard of the axis and a position in which is it disposed forward of the axis.

Abstract: A boom unit for a tree processing machine having a boom with a square cross-section. The boom unit has a boom support with a front boom mounting at the front end of the support and a rear boom mounting at the rear end of the support. The boom is movably mounted through the front and rear boom mountings and is positioned to have a corner of the boom on the bottom and an opposite corner of the boom on the top directly over the bottom corner. The front mounting has a pair of front, bottom rollers arranged in a v shape to cradle the boom with the bottom corner of the boom between the rollers and a single, top, guide member above the bottom rollers and centered with respect to the bottom rollers to ride on the top corner of the boom to hold the boom against the bottom rollers.

Abstract: A portable telescoping tower assembly. The assembly includes a tower mounted on a trailer wherein the tower includes a plurality of telescoping sections that extend for use and retract and nest for storage and transportation. At least one cylindrical ram moves the tower between horizontal and vertical positions. A motor extends and retracts the plurality of sections. Each of the sections includes a plurality of external edges with each of the external edges including at least one protruding guide to mate with and receive an adjoining section.

Abstract: A camera lifting apparatus is used in an industrial vehicle equipped with a cargo handling apparatus for lifting a cargo carrying carriage up and down along a mast provided on a vehicle body. The carriage has a cargo carrying apparatus. The camera lifting apparatus comprises a camera unit attached to the cargo carrying apparatus. The camera unit has a camera for picking up an image of a work area of the cargo carrying apparatus. A moving mechanism moves the camera unit relatively to the cargo carrying apparatus. An actuator drives the moving mechanism.

Abstract: A crane has at least one telescopic crane arm with at least two sliding arms that are moveable against each other. At least one gliding element, which is housed in a frame in a detached and unfastened manner, is arranged between the sliding arms. The gliding element has a separate spring element projecting from the gliding surface of the gliding element.

Abstract: A boom for a load handling machine, the boom has a mounting by which the boom is mounted on a body of the machine, and at least first and second telescoped sections. In use, the boom carries a load handling implement at or towards its outermost end. The first boom section is telescoped within the second section and is extendible and retractable relative to the second boom section by an actuator. At least the first boom section includes walls made at least predominantly of a composite material. A bearing member is located where adjacent walls meet to extend along a substantial length of the first boom section to provide bearing surfaces during sliding of the first boom section relative to the second boom section. Bearings also may be provided on the interior of the second boom section to further protect the first boom section.

Abstract: A telescoping boom has a plurality of boom sections, and the boom sections nest together. The sections include an outer base section, intermediate sections, and an inner section that forms the outer end of the boom when extended. A hydraulic actuator and mechanical flexible links control the extension and retraction of the boom sections, and a hose carrier housing that is mounted as a subassembly carries hoses of sufficient length to carry hydraulic fluid under pressure from a base end of the boom to the outer end. The hose carrier housing supports the hoses folded into lengths in a zigzag form to provide sufficient length for boom extension. All connections to the hoses are accessible at the base end or at the outer end of the inner boom section. The entire hose carrier housing and the hoses are capable of being removed from and replaced into the boom as a unit.

Abstract: A slide arm for a work implement is provided, which is simply structured to obtain improved assembling precision thereby ensuring smooth operation. To this end, the slide arm is such that a plurality of tubular structural bodies (i.e., outer and inner tubes), each of which is formed by bending a one-piece plate into a shape having a substantially triangular cross-section and circular vertex portions, are telescoped one within the other with sliding members (i.e., plain bearing units and slide block pieces) interposed between them at the vertex portions and such that a sliding mechanism is disposed for sliding the tubular structural bodies.

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: A structural boom, as for a crane, including at least one corrugated section; a telescoping boom crane having a multi-sectioned, telescopically extending boom; and an extensible pendant support system including a plurality of pendants.

Abstract: A boom assembly for a crane or other lifting device is provided. The boom assembly includes a plurality of telescoping boom sections, each having an at least partially rounded portion, and a plurality of corresponding wear pads for reducing friction between the adjacent boom sections during relative telescoping movement. The rounded portion includes a plurality of equiangular breaks. Each wear pad is substantially identical and includes a contoured engagement surface for positioning adjacent to one of the plurality of breaks at the lower front end of each boom section. The identical wear pads are interchangeable, which eliminates the need for keeping a plurality of substantially different shapes or sizes of wear pads on hand for positioning at the lower front ends of adjacent boom sections. Spacers may also be provided between the wear pads positioned adjacent to the breaks on outer boom sections to prevent shifting during the relative telescoping movement.

Abstract: The invention relates to a slide mount for telescopic parts, more particularly for crane jibs, including a slipper arranged between the sliding surface areas of the telescopic parts, the slipper being configured so that it is held in place by a wedge effect between the telescopic parts, and the slipper including on its inner and/or outer surface area longitudinal grooves receiving compensating, spacer elements, preferably, elongated strips.

Abstract: An extendable boom for a material handling device includes a first boom section for connection to a support frame, the first boom section having a plurality of first structural members. A second boom section is slidable with respect to the first boom section, for supporting a load to be moved and carried. The second boom section has a plurality of second structural members. Wear pads are positioned between the first and second structural members, the wear pads being a cast polyamide material with oil impregnated therein and subjected to dynamic compressive loading condition characterized by a PV value between 26,400 and 32,000. A method to manufacture the extendable boom is also claimed.

Abstract: A jib bearing assembly for at least two relatively movable telescopic parts of a jib for a crane includes embossments formed on at least one of the telescopic parts and cooperating bearing surfaces on the other part. The bearing assemblies are disposed in high stress and load regions of the cross-sectional configuration of concentric telescoping sections of the jib.

Abstract: The device and method for arresting movement of sections in a telescopic jib, which includes at least a first section and a second section and a telescopic cylinder telescoping the second section along a longitudinal axis of the telescopic jib relative to the first section, telescopes the second section using the telescopic cylinder to a desired working position. Then, movement of the second section is arrested using at least one sliding element connected and moveable with respect to the second section. The sliding element is disposed between the first and second sections, and arrests movement of the second section with respect to the first section when in an arresting position.

Abstract: A support assembly for supporting an extendable frame that is telescopically mounted on a base frame. The support assembly includes a number of support rollers for supporting the extendable frame. The support rollers are supported by lever devices such that the load applied by the extendable frame on the support rollers is proportionately distributed over all of the support rollers. The lever device includes a pivot plate device pivotally mounted to the base frame to pivot about a primary pivot axis. At least two support rollers are connected to the pivot plate to rotate about rotational axes located on opposite sides of the primary pivot axis. Also provided is a telescopic conveyor system having such a support assembly.

Abstract: The present invention relates to a telescopic boom with at least one outer structure and at least one inner structure, each of which is designed as a hollow section with upper flange and lower flange, the upper flange having a half-basket profile with two rounded edges to which the lower flange is joined with a liner of an essentially U-shaped profile, and each structure being mounted on the adjoining structure with a front and a back bearing. To achieve a stable bearing of the structures and a great usable extension length with this boom under high force level, the invention proposes that the front bearing has a slide element in the area between the lower flanges only in the region of the curvature, and the back bearing has a separate plain bearing half liner in the area between the upper flanges only in the region of each rounded edge.

Abstract: A boom collar for an outer telescopic boom section of a telescopic boom includes a tension belt forming at least a bottom surface and first and second curved corner portions of the collar. First and second sliders are disposed in the first and second curved corner portions, respectively, and the first and second sliders translate along the tension belt about a longitudinal axis of the said telescopic boom. First and second webs are connected to either side of the tension belt, and prevent the first and second sliders from moving in a direction of the longitudinal axis.

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 telescopic rod with a plurality of tubular rod sections which are mounted so as to be slidable within each other, and with a multistage piston-cylinder unit arranged within the telescopic rod. The multistage piston-cylinder unit is connected, on the one hand, to the outermost rod section of the telescopic rod and, on the other hand, to the last inner rod section of the telescopic rod. Radially adjustable abutments are provided on the inner base portions of at least some of the rod sections, wherein the abutments are directed toward the outer surfaces of the extended stages of the piston-cylinder unit and can be placed in contact with the outer surfaces. Stationary abutments may be arranged on the first and last rod sections of the row of rod sections of the telescopic rod, wherein the stationary abutments are arranged adjacent the outer surfaces of the corresponding stages of the piston-cylinder unit when the piston-cylinder unit is extended.

Abstract: A telescoping mast with zero clearance which can be used in a fully automatic, relative positioning refueling machine. The telescoping mast consists of a series of nested tubes separated by spacers of unique design. Each spacer consists of an upper spacer assembly attached to the upper end of an inner tube segment nested in an outer tube segment and slidable inside the outer tube segment; and a lower spacer assembly attached to the lower end of the outer tube segment and slidable outside the inner tube segment. The spacer assemblies are preferably made of molded plastic, for example, polyethylene. Each spacer assembly is formed by a spacer ring and a plurality of corrugated members connected at one end to the spacer ring. The distal ends of the corrugated members of the upper spacer assembly contact the distal ends of respective ones of the corrugated members of the lower spacer assembly when the inner tube segment is in an extended position relative to the outer tube segment.

Abstract: A telescopic boom including an elongated hollow outer boom, an elongated inner boom telescopically received within the outer boom, and guidance structure for guiding the inner boom for telescopic movement is provided. The guidance structure includes a plurality of guide rails attached to the interior corners of the outer boom, a first roller assembly attached to one end of the inner boom, and a second roller assembly attached to one end of the outer boom. The first roller assembly includes a plurality of wheels mounted on axles for engaging the guide rails. Each of the wheels includes an arcuate rail-engaging portion which presents a radius of curvature equal to the radius of curvature of the guide rails. The second roller assembly includes a pair of roller bars positioned on opposed sides of one end of the outer boom for guiding the inner boom during telescopic movement. Each of the roller bars extends transverse to the longitudinal axis of the outer boom and is rotatably mounted on an elongated shaft.

Abstract: An extensible and retractable telescoping tube positions test devices that inspect large stationary objects. The tube has three dimensional adjustment capabilities and is vertically suspended from a frame. The tube sections are independently supported with each section comprising U-shaped housing secured to a thicker support plate. Guide mechanisms preferably mounted only to the thicker plates guide each tube section parallel to a reference axis with improved accuracy so that the position of the remote end of the telescoping tube is precisely known.