Abstract: A portable winch suitable for use in underground pipe bursting and replacement includes a mounting frame positionable at a top opening of a hole such as a receiving pit or manhole. A telescoping mast having a series of nested, top and bottom mast sections is mounted on the frame. A powered winch unit, also mounted on the frame, includes a drive unit and a cable. A guide assembly includes a sheave that guides the cable from the drive unit to the bottom mast section. Suitable means are connected to the frame for mechanically raising and lowering the mast into and out of the hole. As such, the mast according to the invention does not require assembly or disassembly at the beginning and end of each job. The mechanical means for raising and lowering the mast is preferably the powered winch unit.

Abstract: A transfer apparatus includes a fixed base, a swivel, a lift mechanism for raising and lowering the swivel relative to the fixed base, a swivel mechanism for turning the swivel about a vertical swivel axis, a linear movement mechanism supported by the swivel, and a hand supported by the linear movement mechanism for transportation of a work along a linear horizontal travel stroke. The lift mechanism includes N (N is an integer equal to or greater than 2) lift members arranged for telescopic expansion and retraction relative to the fixed base. The lift mechanism also includes N lift drive mechanisms each for raising and lowering one of the lift members relative to an immediate lower-stage lift member. The swivel is supported by an uppermost one of the lift members. (FIG.

Abstract: The within invention concerns a crane with a rotating platform that can rotate on a vertical axle, a boom that is connected to the rotating platform and which can luff on a luffing axle, guying connected on the one hand with the boom and on the other hand with a guy support, which can slew on an axle parallel to the luffing axle of the boom and is connected with the rotating platform and/or the boom foot, as well as an adjustment mechanism, in particular adjustment cabling, that serves for the luffing of the boom and which is connected with the guy support. According to the invention, the crane is also characterized by the presence of an angle adjustment mechanism by means of which the angle of the guy support can be adjusted relative to the boom when the boom is raised.

Abstract: A hoist for retrieving, lifting and positioning a light load of up to about 1000 lbs, is described. The hoist comprises a boom support column having an attaching lower end and a boom support upper end. The boom support upper end has a boom assembly connector and a transverse support surface. The boom assembly has a connecting support wall and a lower projecting connector for rotational connection with the boom assembly connector for maintaining the boom at an upward angular position. A releasable locking mechanism locks the boom at the upward angular position. A boom actuating brake arrests rotational displacement between the connecting support wall and the transverse support surface when the boom is at a substantially horizontal load retrieving position. A pulley is rotatably secured to an axle secured at a free end of the boom. The pulley is adapted to guide a cable thereon through a cable guide linkage to align and maintain the cable on the pulley.

Abstract: A crane including a cabin provided on the left or right side, a boom raised and lowered around a pair of boom feet provided on the left and right sides of the base of the boom, and a gantry provided behind the boom. The boom foot on the side of the cabin is located in a position determined by the width of the crane and the width of the cabin. The center line of the boom is located on the opposite side of the center line of the gantry from the cabin so that the distance between the boom foot on the opposite side from the cabin and the center line of the gantry is greater than the distance between the boom foot on the side of the cabin and the center line of the gantry.

Abstract: The invention relates to a tensioning system for a mobile telescopic crane, in which the telescopic mast is outwardly braced via a tensioning means, and wherein said tensioning means is guided along or over the telescopic mast and fastened to the telescopic mast in such a way that a pressure bias of the mast is created in the area of the tensioning means guide. The tensile units or winches of a system in accordance with the invention are arranged on the crane superstructure at a distance from the level luffing plane of the telescopic mast of the crane, such that the tensioning means can absorb a substantial proportion of the loads having components perpendicular to the level luffing plane. The tensioning means tensile units or winches of a system in accordance with the invention are arranged on the crane superstructure, such that they can shift.

Abstract: The present invention provides a crane where a spreader retainer is disposed on a rear surface of an extreme end of the lowest boom portion used both for a tower boom and a normal boom, a distance between an upper spreader, which constitutes a boom raising/lowering apparatus, and a lower spreader at the maximum boom raise angle and the length of the lowest boom portion are set such that the upper spreader can be lowered to the position of the spreader retainer if the boom raising/lowering apparatus lays the boom on the ground, and a boom raising/lowering rope is then loosened for disassembly of either the tower or normal boom. Consequently, the upper spreader can be lowered to the position of the spreader retainer on the lowest boom portion when the boom is disassembled either for the tower crane or normal crane specification.

Abstract: The within invention concerns a telescopic boom of a crane with a pivot section, telescopic sections that can telescope out of the pivot section, and a guying that has at least one guy stand housed to pivot on one of the sections, and at least one guy cable supported by the guy stand, as well as erection mechanisms for raising the support stand out of folded transportation position into raised operating position. According to the invention, the telescopic boom is characterized by the fact that the erection mechanism consists of a tension rod that connects the guy stand with an internal telescopic section that can telescope outward opposite the section on which the guy stand is housed to pivot.

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

Abstract: A mobile crane includes an under carriage, a superstructure that is rotatably mounted on the superstructure, and a main boom, which is composed of a base body and several telescopic lengths up to a predetermined maximum number, which slide into one another and can be extended from the base body. The main boom is mounted on the superstructure so that it can rotate about a horizontal axis and its inclination can be adjusted by means of a hydraulic tilting cylinder that is hinged on the superstructure and the base body. A maximum permissible weight is predefined for the main boom, as a result of a restriction on the permissible axle load of the mobile crane during road haulage. The crane is also provided with a lifting capacity increasing device, which significantly increases the lifting capacity of the main boom when the telescopic lengths are extended, in relation to the state without the lifting capacity increasing device.

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 portable winch suitable for use in underground pipe bursting and replacement includes a mounting frame positionable at a top opening of a hole such as a receiving pit or manhole. A telescoping mast having a series of nested, top and bottom mast sections is mounted on the frame. A powered winch unit, also mounted on the frame, includes a drive unit and a cable. A guide assembly includes a sheave that guides the cable from the drive unit to the bottom mast section. Suitable means are connected to the frame for mechanically raising and lowering the mast into and out of the hole. As such, the mast according to the invention does not require assembly or disassembly at the beginning and end of each job. The mechanical means for raising and lowering the mast is preferably the powered winch unit.

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 includes is removably attachable to a vehicle hitch and includes a connector member and a first locking plate for adjustably connecting a base member to the connector member. The locking plate allows the connector portion to be selectively rotated in a first plane. The hoist further includes a boom pivotally connected to the connector member for allowing the boom to be pivoted in a second plane substantially perpendicular to the first plane. The hoist further includes a winch for pivoting the boom along the second plane. Alternately, a piston may pivot the boom along the second plane. A lifting member is removably connectable to the boom and for transporting an object from a first location to a second location. In an alternate embodiment, the hoist may include a manually or hydraulically operated winch for controlling the lifting member.

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: This invention relates to the coating of steel parts with organic polymeric materials for resistance to corrosion, abrasion, impact, salt solutions of high and low pH (both in liquid as well as vapor state) and corrosive atmospheric gases under the environment of high relative humidity and ambient conditions of temperature and pressure. To obtain secure and permanent adhesion of the coating on the steel article a polymeric coating is formulated so as to achieve chemical grafting to the steel face. This involves the use of monomers, prepolymers, catalyst and a graft initiator system. The monomers are preferably polyfunctional and when applied onto a metallic substrate, react via graft polymerization with the metal to form a polymerized layer coated onto the surface of the steel substrate.

Abstract: An apparatus and method of self-raising a mast for a crane having an upper works rotatably mounted on a lower works and a boom pivotally mounted on the upper works, the boom being supported by boom hoist rigging and a mast pivotally connected to the upper works. The crane further includes a self-raising mast assembly for controlling the position of the mast when the mast is not connected to the boom and is not supportable by the boom hoist rigging. The self-raising mast assembly comprises a mast raising yoke pivotally connected to the upper works, a hydraulic mast raise cylinder pivotally connected between the upper works and the mast raising yoke, and a hydraulic system for controlling the mast raise cylinder.

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: The within invention concerns a vehicle crane with a telescopic boom that can move on a horizontal axle and rotate on an upright axle with a pivot section, telescoping sections that can telescope out of the pivot section, and also with two anchor supports flexibly housed on one of the sections so that they can pivot out of transportation position, in which they are folded essentially parallel to each other against the section, and can be spread apart into an erect, particularly V-shaped, operation position. The invention also concerns a process for assembling or dissembling said anchor supports of the telescoping boom of the vehicle crane. According to the invention, when the boom is lying in essentially horizontal position, the anchor supports can be disassembled, are positioned on brackets provided next to the boom, and after the boom is raised are raised from the brackets and loaded by the boom itself.

Abstract: The auto-erection tower crane possesses a tie-free jib, mounted at the summit of a mast and extended, toward the rear of its connection point to the summit of the mast, by a counter-jib, the end of which is connected, by a rear tie, to a bogie truck element of the crane. For the transport of the crane, the counter-jib is folded up in a vertical plane on the rear part of the jib. The unfolding and folding-up of the counter-jib are realized automatically, simultaneously with the automatic erection or dismantling of the crane. The structure of the counter-jib also allows adjustment of the working position, horizontal or inclined, of the jib.

Abstract: An apparatus and method of self-raising a mast for a crane having an upper works rotatably mounted on a lower works and a boom pivotally mounted on the upper works, the boom being supported by boom hoist rigging and a mast pivotally connected to the upper works. The crane further includes a self-raising mast assembly for controlling the position of the mast when the mast is not connected to the boom and is not supportable by the boom hoist rigging. The self-raising mast assembly comprises a mast raising yoke pivotally connected to the upper works, a hydraulic mast raise cylinder pivotally connected between the upper works and the mast raising yoke, and a hydraulic system for controlling the mast raise cylinder.

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 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: In the present crawler crane, an engine including a power plant for supplying driving pressure oil to a main winding drum, an auxiliary winding drum and a third drum is mounted on either left or right side of a revolving frame, a counterweight having a front side formed into a recessed surface is mounted at the rear of the main winding drum, the auxiliary winding drum and the third drum, and a boom rising and falling drum is installed within the recessed portion, thus making it possible to mount the third drum which has the same shape as the main winding drum and the auxiliary winding drum, for example. It is possible to provide a crawler crane capable of performing operation for versatile uses.

Abstract: A crane having an upper works rotatably mounted on a lower works and a boom pivotally mounted on the upper works includes a hydraulic boom hoist cylinder and a hydraulic circuit for controlling the hydraulic boom hoist cylinder. The hydraulic cylinder is pivotally connected to a mast on the upper works and pendently connected to the boom. The boom hoist cylinder preferably comprises two double-acting hydraulic cylinders. The hydraulic circuit includes a closed loop pump and a hydraulic controller connecting the closed loop pump and the double-acting cylinders such that fluid from the pump can be directed either to extend or retract the cylinders, with the hydraulic fluid exiting the cylinders being directed to return to the pump.

Abstract: A ringlift crane having a ring which can be elevated and forms an annular track. Arranged within the ring is a standardized undercarriage from a first crane class and a standardized upper carriage, which is connected for stewing action to the undercarriage and has a plurality of hoisting winches. The upper carriage is connected to one adapter in both end regions. The adapters are supported with rolling action on the annular track of the ring by rollers. The center point of the ring and/or of the undercarriage forms the stewing axis. One adapter is designed for accommodating a counterweight and the other adapter is designed as a load-bearing element for the main boom and the mast (counter-boom) which can be articulated at the free end of the adapter. The top of the mast is connected, on the one hand, to the counterweight via a stay cable and, on the other hand, to the head of the main boom via a changeable-length cable stay.

Abstract: This invention concerns a vehicular crane with a telescoping boom attached to its bed in such a manner that it can luff, as well as guying for the telescoping boom, which has a guy support on the back of the telescoping boom, guying cabling from the guy support to a head or collar of a telescoping boom section, as well as at least one winch to tension the guy cabling, where the guy support has two V-shaped, spreadable legs whose ends on the boom side are mounted to allow them to pivot and whose ends opposite the telescoping boom can each be connected to a guy cable. According to the invention, the vehicular crane is characterized by the fact that the guy support is designed to be free of cross beams between its two legs away from the outer ends.

Abstract: A seismic isolation system is provided with a swing bearing ring consisting of an upper ring and a lower ring, which are rotatable relatively, between a crane body and a traveling means. A lower vertical shaft of a block pivotally supported on saddles of the crane body is supported by a swing bearing provided at an eccentric position on the upper ring. An automatic restoring mechanism is provided which restores the swing of a horizontal lever, whose proximal end is installed to the upper ring of the swing bearing ring, around the centerline C2.

Abstract: A vertical lift hoist and winch is taught which can be used, for example, for suspending wild game animals for the purpose of field dressing. The assembly is collapsible without any disassembly of major parts, to be able to fold up into a convenient carrying position, or to be capable of storage in a normal automobile truck, Jeep or station wagon compartment or a truck tool box. The winch lift assembly permits convenient storage and ease of set-up, where all pieces are held together as one. The pulley's are recessed in the upper boom which allows a tight closure in the collapsed position which is an advantage over other types of lifts. Nothing hangs down below the boom, thereby eliminating any cable tangles or interference when setting up or storing.

Abstract: This apparatus relates to a portable, fold-up hoist for attachment to a vehicle via a receiver hitch. The hoist has a tongue member for insertion into and securement by the hitch. Pivotally connected to the tongue member is a telescoping vertical support member. On the upper end of the vertical support member is a boom arm, which is both pivotally and swivelably connected to the vertical support member. Thus, the boom arm may be supported perpendicular to the vertical member and swivel around the vertical support member, for example, to move directly above the tongue and to move to be parallel but opposing the tongue. The boom arm may pivot down to be near and generally parallel to the vertical support member for storage. The vertical support member is pivotal on its proximal end from a first (storage) position generally parallel to the tongue member to a second (use) position generally perpendicular to the tongue member.

Abstract: A counter-jib on which ballast can be hung and a hydraulic ram which can swivel said counter-jib both being falcrumed on a supporting frame. The frame is bolted at at least two connecting points to the rotating deck in such a way that after the creation of the bolt connection located in the area of the fulcrum part, the other connecting point of the bolt connection can be swivelled at its bolting position on the rotating deck by luffing up the retracted jib. The mobile crane in accordance with the invention possesses as an additional piece of equipment a counter-jib whose installation allows said mobile crane to be converted into a derrick crane with a very much higher lifting capacity.

Abstract: A crane having an upper works rotatably mounted on a lower works, a boom pivotally mounted on the upper works, and a hydraulic boom hoist cylinder to control the angle of the boom. The crane further comprises a mast and a hydraulic cylinder pivotally connected to the upper works. The connection of the mast to the upper works is at a location separate from, and at an elevation below, the elevation of the connection of the hydraulic cylinder to the upper works. The hydraulic cylinder is pivotally connected to the mast and pendently connected to the boom.

Abstract: An apparatus for reducing the axle load of a multiaxle movable crane which includes a truck; a superstructure rotatably mounted on the truck; a main jib including a basic jib and at least one telescopic section, the basic jib having a plurality of rollers fastened in operative connection, the main jib being releasably fastened to the superstructure; and a semitrailer having a front end and a back end with a loading area, a first ramp-like beam and a second ramp-like beam arranged in a longitudinal direction of the semitrailer in the loading area so as to be parallel to and at a distance from one another, each ramp-like beam having a top edge and a contoured runway disposed along the top edge, the rollers being configured to the contour of the runway and operable to transport the main jib from the superstructure to the semitrailer.

Abstract: A railborne mobile crane with an auxiliary car which is coupled to the crane car and has a supporting device for the head of the boom during transport, wherein the boom lies essentially horizontally and is articulated at the boom base at the pivoting frame of the mobile crane. The boom head which extends the boom in the longitudinal axial direction is connected with the boom so as to be articulated vertically and can be deposited on the supporting device which is fastened to the auxiliary car so as to be pivotable about a horizontal axle and is provided with a three-dimensionally articulated abutment for the boom head which is, in turn, displaceable on the supporting device transverse to the longitudinal axis of the boom.

Abstract: A roll bar and crane device for use with vehicles such as a truck is adapted to be mounted to the truck bed. The device includes left and right leg members and a central beam extending therebetween and being selectively detachable thereto. A U-shaped boom extends over the left and right leg members when used as a roll bar. The boom, at one end, is pivotally connected to a pivot member about a horizontal axis of rotation and the pivot member is pivotally connected to one of the leg members and is pivotable about a vertical axis of rotation. A hydraulic jack selectively lifts and lowers the boom when used as a crane. Covers are provided on the boom left and right legs and hide from plain view working components including the hydraulic jack.

Abstract: A crane, in particular railbound mobile crane, with a luffing jib telescoping at both sides which can be swung up and down as well as raised and lowered with its base boom. The boom is supported in its end regions at the vehicle on a swivel bearing which can be raised and lowered. The luffing jib is swivelable about vertical axes in the region of the swivel bearings. For this purpose, every swivel bearing is supported at one of two separate multiple-axle traveling mechanisms so as to be displaceable traverse to the longitudinal axis of the mobile crane. The two traveling mechanisms are coupled with one another via the base boom of the luffing jib, which base boom is connected with the swivel bearings.

Abstract: In the present invention, there is provided a mobile crane for hoisting movable articles and for being towed to and from an article hoisting site behind a pickup truck having a hitch attachment. The mobile crane comprises a frame having a front end, a rear end, a pair of front wheels and a pair of rear wheels. The mobile crane also has a mast extending vertically from the frame and a boom support bracket affixed to the mast. A telescopic boom having a far end and a near end is movably cantilevered in the boom support bracket. A tow bar is removably connected to the far end of the boom. The tow bar has a hook-up member mounted thereon and is connectable to the hitch attachment of the pickup truck. A double-acting hydraulic cylinder is connected between the boom support bracket and the boom for raising the front wheels off the ground when the hook-up member is connected to the hitch attachment.

Abstract: A proportionally extendable multi section boom crane is provided with an automatically erectable mast pivotally carried by one of the boom sections. The mast, which has a secondary sheave on the outer end thereof, normally rests in a stowed position adjacent the boom section on which it is mounted. The load line of the crane extending from the winch at the base of the boom section is trained over the secondary sheave, as well as sheave structure on the outermost end of the outer boom section. Elongated rod structure carried by one of the extendable boom sections outwardly of the crane has coupling means thereon engageable with the mast to initiate erection thereof after the proportionally movable boom sections have been extended a predetermined extent, normally after about 50% extension thereof.

Abstract: The present invention relates to a mobile crane with a telescoping jib hinged to its superstructure which jib can be luffed by a luffing ram which is hinged to the telescoping jib and the superstructure, with a guy pole hinged on the rear side of the telescoping jib in the upper area of its hinge section which guy pole can be raised by a hydraulic ram, and with a winch by which a guy rope extending from the tip of the guy pole to the top part of the inner telescope section or a truss of an upper telescope section can be tautened. In accordance with the invention the guy pole is guyed over the superstructure, the base or the hinge axle of the hinge section or the lower area of the hinge section by a rope or by a rod of a predetermined length and the winch is positioned in the area of the tip of the guy pole.

Abstract: A roll bar and crane device for use with vehicles such as a truck is adapted to be mounted to the truck bed. The device includes left and right leg members and a central beam extending therebetween and being selectively detachable thereto. A U-shaped boom extends over the left and right leg members when used as a roll bar. The boom, at one end, is pivotally connected to a pivot member about a horizontal axis of rotation and the pivot member is pivotally connected to one of the leg members and is pivotable about a vertical axis of rotation. A rope and pulley system is provided between the pivot member and the boom. A rope extends from the boom lift end to the pulley and rope system and to a winch that is located on and is rotatable with the pivot member. By pulling the rope via the winch, objects attached to the end of the rope are drawn up and to the boom lift end and the boom is also caused to pivot about the horizontal axis of rotation for lifting the boom lift end.

Abstract: A portable crane for use on a pickup or utility truck is disclosed. The crane has a mounting base rotatably mountable to a tray of the motor vehicle. The crane includes a post connectable to a base frame which is welded to the mounting base. A lifting arm and a brace are telescopically arranged for different use configurations. The post, the brace and the lifting arm are able to be folded together to be substantially parallel when the crane is in its folded configuration.

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: A portable crane operable between a first, extended position for lifting loads and a second collapsed position for transportation includes a handle having first and second ends. A boom having first and second ends is provided such that the first end is pivotally interconnected to the first end of the handle. The boom extends outwardly from the first end of the handle in the crane first position and is disposed parallel to the handle in the crane second position. Structure is provided for supporting the handle first end and extends in a direction opposite the boom in the crane second position. A pair of outriggers anchor guy cables on the first end of the handle. A cable extends between the handle second end and the boom second end for receiving a load, such that as the cable is retracted, a load is lifted toward the boom second end.

Abstract: A method and apparatus for self-assembling and self-disassembling a large capacity crawler crane. The method uses the load hoist line of a crane to remove the equalizer from the boom. The method also uses a hydraulic cylinder to support, raise and lower the boom after the equalizer has been removed from the boom. Finally, the boom butt can be disassembled into several parts.

Abstract: Disclosed is a new trailer-mounted crane for providing a vehicle-trailable general purpose lightweight crane. The trailer-mounted crane comprises a flatbed trailer defining a transportable crane base. A crane boom, comprising an elongated steel channel having a sheave mounted at the distal end thereof, is pivotally connected central a top rear edge of the trailer deck such that a distal end of the boom is elevationally adjustable for hoisting, moving, and lowering loads. A telescoping boom travel limit arm prevents the boom from being raised to a dangerous vertical orientation whereupon the boom and any load suspended therefrom may fall towards operating personnel. Boom sway damping arms control swinging load induced boom yaw whereby improving overall stability of the crane. A manual load hoist winch, having a load hoist cable operably connected thereto, is secured to the trailer. A motorized boom pitch winch, having a boom pitch cable operably connected thereto, is also secured to the trailer.

Abstract: A lift mountable in a transporting vehicle for loading and unloading objects such as small motorized carts. The lift includes an adjustable stand and pivotal boom assembly. An electric motor selectively operates a drum on which is wound a lifting cable or strap which terminates at a lifting hook or claw which is attachable to the cart or object. The adjustability of the stand and boom make the lift highly versatile and adaptable for convenient mounting in different vehicle configurations.