Abstract: At least one section of a jib of a crane, such as a mobile crane, includes a composite cross-section incorporating a layer of steel covered by one or more fiber composite layers. In a preferred embodiment, more than one fiber composite layer is included and the respective fiber layers are disposed in a criss-cross manner with respect to each other to enhance the overall strength of the telescopic part. Also, in a preferred embodiment the steel layer of the composite is on the interior of the telescopic part for minimizing thermal stresses due to temperature changes caused by sun loads. In another preferred embodiment, the composite fiber layers are disposed only in the zone of the cross-section of the telescopic part, which is subjected to tensile forces during use.

Abstract: A locking unit for a telescopic system of a hydraulically actuated telescopic jib of a crane, having a jib box frame and a plurality of telescopic sections which are guided inside one another and can be moved out of a starting position into in each case at least one extended position is provided with a drive for moving at least one driver bolt of a locking unit into and out of a section receptive driver bolt opening, and for moving a coupling device for displacement of at least one locking bolt into and out of a locking bolt receptive opening, the drive being arranged fixedly on the box frame of the jib, there being a mechanical drive connection between the drive and the locking unit.

Abstract: A telescoping tube assembly includes a frame and a first longitudinal tube section mounted on the frame. A second longitudinal tube section is disposed within the first longitudinal tube section and adapted for telescoping motion into and out of the first longitudinal tube section. The telescoping tube assembly includes a cabling system that includes a top pulley assembly and a bottom pulley assembly, the bottom pulley assembly adapted for movement in response to the telescoping motion of the second longitudinal tube section. One or more cables extend from the remote end of the innermost longitudinal tube section and traverse the top pulley assembly, the bottom pulley assembly and are fixed relative to the frame.

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: A telescopic boom arrangement of a vehicle is provided with a fixed, tubular outer boom and an inner boom which is mounted for sliding within the outer boom. Transmission lines for coupling various functions, carried at the end of the inner boom, with a power source/and or controls include an intermediate section mounted to the outer boom by a transmission line routing assembly which holds first ends of the intermediate section of the transmission lines at a fixed location and establishes a guide along which second ends of the section of transmission lines is moveable lengthwise of the outer boom. The intermediate section of the transmission lines is flexible and defines a bow which changes in length as the inner boom extends and retracts relative to the outer boom.

Abstract: A locking mechanism for telescoping sections, in particular for a mobile crane boom, includes a linearly shiftable locking bolt for connecting and releasing an inner telescoping section with respect to an outer telescoping section, said locking bolt being maintain ed biased in its extended position. The locking bolt is shifted by means of a rotary actuator from its extended position into its retracted position.

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 telescoping boom crane having a multi-sectioned, telescopically extending boom and an extensible pendant support system. The extending boom includes boom sections that are extensibly receivable within the adjacent boom section. The boom sections are made of a sheet material. A releasable locking mechanism may be attached to the boom sections to secure the boom sections. The extensible pendant support system includes a plurality of pendants. The pendants are extensibly receivable within an adjacent pendant. The pendant support system at least partially supports the boom when a load is applied to the boom. Further, the support system may include a forestay length locking device functioning to prohibit extension of a subsequent pendant from an adjacent pendant once the former pendant achieves an extended position.

Abstract: A lifting apparatus including a horizontal framework having a connector connected to a bridge crane trolley and a motor mounted on the horizontal framework, a telescoping mast unit coupled to one side of the horizontal framework and having upper, middle, and lower mast assembly and adjusting a height of the lifting apparatus, a fork tine assembly adjusting the tine center to center distance, and a counterbalance coupled to the other side of the horizontal framework is provided. The horizontal framework is coupled to an overhead bridge crane and is accessible to any load located within a minimum amount of aisle space.

Abstract: Winch apparatus for raising and holding a rolling steel door includes a wheeled base with telescoping members extending upwardly from the base. A hand cranked winch raises and lowers the telescoping members, while a reversible electric motor is used to power a separate winch for raising and lowering a load secured to an arm extending outwardly from an innermost telescoping member. The arm is disposed against a building when the apparatus is in position to raise the rolling steel door for its installation.

Abstract: A locking assembly for the telescopic jib of a crane, or mobile crane, includes a plurality of telescopic sections wherein locking pins are supported in an inner telescopic section and are biased outwardly by means of a spring for engagement within receiving apertures in an outer telescopic section surrounding the inner telescopic section. A release device is provided for engaging the inner end of a locking pin in order to release the locked position thereof against the spring biased. Preferably two locking pin are provided for each locking unit and are disposed on the inner telescopic section so that they will engage two oppositely located receiving apertures in the vertical side webs of the outer telescopic section.

Abstract: A mobile crane including an inclinable telescopic jib having a base case, a plurality of telescoping segments which can be extended and retracted, at least an inner-most one of the telescoping segments being pivotable in a direction of the inclinable jib and connected to a non-bending one of the segments by a hinge which forms a bending point which can be closed and opened, the hinge of the bending point being arranged on the underside of the jib, and an adjusting device arranged on a topside of the jib for opening and closing the bending point.

Abstract: Apparatus for fixing the angular position of two telescopic parts relative to each other, comprising a stopper arranged on the first telescopic part and an adjuster provided with a shiftable element arranged on the second telescopic part. The adjuster comprises a piston/cylinder unit arranged on the inner telescopic part, which may be actuated by fluid supply and discharge, as well as an arrangement and method for fixing two telescopic parts of a crane jib.

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: A telescoping tube assembly includes a first longitudinal tube section and a second longitudinal tube section disposed within the first longitudinal tube section and adapted for telescoping motion into and out of the first longitudinal tube section. A third longitudinal tube section is disposed within the second longitudinal tube section and is adapted for telescoping motion into and out of the second longitudinal tube section. A drive motor is joined to the second longitudinal tube section to move therewith and operates a first ball-screw assembly and a second ball-screw assembly. The first ball-screw assembly is operatively connected between the first longitudinal tube section and the second longitudinal tube section. The second ball-screw assembly is operatively connected between the second longitudinal tube section and the third longitudinal tube section.

Abstract: A telescopic jib includes a base part, and at least one telescopic part telescoped in the base part. A shift mechanism extends and retracts each telescopic part. The base part and each telescopic part includes an upper semi-box shaped section part, and at least one of the base part and the telescopic part includes a lower section part having shell segments adjoining each other. Each shell segment has an outwardly curved shape.

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: An articulated telescopic boom assembly for a lifting device includes a first elongated boom having a central longitudinal axis and an opening in one end; a second elongated boom having a first end normally telescopically received by and extensible from the first boom opening, the first end having at least one elongated pivot guide slot therein having a central longitudinal axis with an open end remote from the first end and a closed end proximate to the first end; and a slide-through knuckle having a housing with an opening therein for receiving the second boom during extension and retraction thereof. The housing is pivotally connected to the first boom by a pair of opposing elongated pins which define a pivot axis. The central longitudinal axis of the pivot guide slot is offset from and perpendicular to the pivot axis such that when the closed end of the guide slot is registered with the pivot pins, the second boom is pivotable.

Abstract: A multi-stage telescoping tube structure and a robot including a multi-stage telescoping tube structure. The multi-stage telescoping tube structure includes an outer tube, an intermediate tube, and an inner tube. The intermediate tube is slidably received in the outer tube, and the inner tube is slidably received in the intermediate tube. It further includes a multi-stage screw for arrangement translating rotary motion into linear movement of the tubes, and a drive means coupled to the screw arrangement. The robot further includes a support bracket, rotatably supporting the multi-stage telescoping tube structure, and an electric motor for rotating the arrangement. The structure further includes rail guides engagable with complimentary horizontally extending rails for horizontal movement of the robot.

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: An in-vehicle device for lifting objects into and out of the storage areas of the vehicle in which it is installed. The device is attached to the inside wall, floor, or ceiling area of the vehicle in which it is installed. It is fixedly attached to the vehicle by a mounting element which is connected to a swivel base element containing, in one embodiment, a winch with a cable running through a telescoping arm protruding from the base. The arm telescopes into and out of the base. The cable has a hook on its end to enable it to hook onto handles or ropes on objects to be stored in the vehicle and removed therefrom to a desired location. The winch is operated manually or by an electric motor or other mechanical means. The mounting element is attached to the vehicle by bolts, rivets, adhesives and the like. The base can be connected to the mounting element by a ball and socket joint to enable it to swivel in all directions, or it can be connected by a joint which enables it to swivel horizontally only.

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

Abstract: An improved boom (24) for a sliding boom delimber (10) is disclosed formed from a prestressed, conventional I beam (28). A first segment of a cable bundle (70) extends from the grapple head (36) and is secured adjacent the lower flange (32) of the I beam (28). The second segment of the cable bundle (70) is inside and carried by an energy chain (74) and includes first and second, inversely related, linear portions interconnected by a third, C-shaped portion. A sag plate (60) is coextensive with the first segment and located on the opposite side of the first segment than the lower flange (32) for preventing the first portion from sagging and engaging the first segment. Sides (50, 52) extend from the outer edges of the I beam flanges (30, 32) for partially enclosing the energy chain (74).

Abstract: An apparatus for cutting a path of propellant grain away from a solid rocket motor. The apparatus includes a telescoping arm connected to a rotatable body. A cutting tool having a primary and secondary cutter is connected to a distal end of the telescoping arm. The secondary cutter is disposed adjacent the primary cutter and configured to make cuts through the portion of propellant grain along the path such that the grain is cut away from the rocket motor in a plurality of pieces. The telescoping arm includes a plurality of interconnected extendable concentric cylinders configured with a plurality of ball/spring detents each bearing a resistance load for restraining one of the concentric cylinders such that the innermost unextended of said concentric cylinders extends prior to the extension of any other of said unextended concentric cylinders.