Abstract: The disclosure is directed at an apparatus for an active converter dolly for use in a tractor-trailer configuration. In one aspect, the apparatus includes a system to connect a first trailer towed behind a towing vehicle to a second trailer. The apparatus further includes a kinetic energy recovery device for translating the mechanical motions or actions of the dolly into electricity or electrical energy so that this energy can be used to charge a battery or to power other functionality for either the dolly or the tractor-trailer. The active dolly may also operate to assist in shunting the tractor-trailer. The active dolly is operable in a number of modes to increase vehicle performance and efficiency.

Abstract: A powered jacking mechanism for semi-trailer landing gear is disclosed. The mechanism includes a coupling for attachment to an operating rod of a semi-tractor trailer landing gear jack. The coupling includes an idler sleeve for retaining the manual jack handle with the trailer during powered operation of the jack. The coupling includes a modified drive socket for selective coupling with either a drive end of the manual jack handle and a drive bit coupled to a rotary drive unit. In preferred embodiments, the rotary drive unit is a cordless screwdriver.

Abstract: A parked freight trailer stabilizer and restraint comprising: (a) a kingpin receiver configured to lock onto a kingpin of a parked freight trailer; (b) a jack operatively coupled to the kingpin receiver, the jack repositionable between a retracted position and an extended position; (c) a tail hold operatively coupled to the kingpin receiver, the tail hold repositionable between a stowed position and a restraining position, the tail hold configured to engage a ground mount; and, (d) a transport receiver configured to engage a transport vehicle.

Abstract: A torque load binder for changing tension in a chain or strap securing a load to a vehicle or support surface. The load binder includes a housing with an internal gear mechanism and a connector mechanism operatively engaged with the gear mechanism and extending outwardly from the housing. A high speed first driveshaft and a lower speed second driveshaft on the load binder are selectively individually actuated to effect movement between first and second end linkages of the connector mechanism. The first driveshaft effects movement between the first and second end linkages at a first speed and the second driveshaft effects movement between the end linkages at a lower second speed. Rotation of either of the first or second driveshafts actuates the connector mechanism, changing the distance between the first and second end linkages, and thereby changing the tension in the tie-down.

Abstract: A walking trailer stand including a mobile trailer assembly, a trailer stand assembly, and a reversible feet assembly is disclosed. These assemblies allow for the manually powered movement of a mobile trailer. The trailer stand assembly including a leg holder to receive a bottom end of a trailer A-frame. The leg holder being mounted to either side of a base via a bracket. The base including a jack guide extending from a base top end and an internally mounted jack holder. Wherein the jack guide and jack holder receive a jack member therein to form a fulcrum to allow a user to lift and drop the trailer A-frame. The reversible feet assembly including reversible feet that include a rubberized portion and an oppositely arranged cleated portion. The reversible feet are mounted to an underside of the base so the trailer may be walked with the actuation of the jack member.

Abstract: An automated vehicle jack includes an upper plate and a lower plate with a lifting mechanism disposed therebetween. The upper plate is fixedly attached to a lower side of the vehicle chassis, near each of the front and rear tires. The lifting mechanism is a scissor jack formed of a pair of upper arms pivotally connected to the upper plate and a pair of lower arms pivotally coupled with the lower plate. A motorized drive screw operates the lifting mechanism upon receipt of a predetermined command from a control panel in the vehicle passenger compartment or a portable electronic device.

Abstract: A lift system for elevation of a load bed of a vehicle is disclosed. The lift system contains at least two pair of vehicle supports, each vehicle support comprising at least one extensible ground support stabilizer leg. The at least one extensible ground support stabilizer leg comprises a top portion coupled to an air bladder. The at least one extensible ground support stabilizer leg is configured to move along a vertical traction during movement from a fully retracted position to a fully extended position. A biasing element having at least one coil spring enclosed within the vertical housing of the extensible ground support stabilizer leg, configured to compress under tension when the extensible ground support stabilizer leg is extended and expand to release tension when the extensible ground support stabilizer leg is retracted.

Abstract: A method of retrofitting a trailer having a crank jack with a jack housing and a jack leg into a hydraulic jack includes removing mechanical components from within the jack housing, the mechanical components comprising gearing of the crank jack, placing a hydraulic cylinder within the jack housing, wherein the hydraulic cylinder comprises a main cylinder and a ram piston extending outwardly therefrom as the main cylinder is filled with pressurized fluid, securing the hydraulic cylinder by fastening a top portion of the hydraulic cylinder to the jack housing using a fastener inserted through a hole in a platform positioned within the jack housing, and further securing the hydraulic cylinder by fastening the ram piston to the jack leg using a bolt extending through a pre-existing hole in the jack leg.

Abstract: A powered landing gear mounted to a trailer includes an electrical connector mounted to the trailer that is configured to receive a jumper cable connected to a truck for supplying electrical power to the trailer, with a wiring harness mounted to the trailer that is electrically coupled to the connector. A landing gear includes a housing member, a telescoping leg member, a gear assembly configured to extend and retract the leg member relative to the housing member, and a drive system including a drive motor operatively engaged with the gear assembly, with the landing gear being operatively powered by electricity provided through the connector and wiring harness from the truck. The wiring harness may be operatively electrically coupled to the drive motor and/or a rechargeable power supply that is in turn electrically coupled to the drive motor, including through a controller.

Abstract: A system for monitoring the use of one or more lift devices used for raising or lowering the landing gear of a semi-trailer. A data management module within the system includes a suite of features which are used to take received lift device data and convert it into an easily understood graphical representation. Each lift device is configured to transmit data related to its operation to the data management module of the system which then displays the lift device data as a graphical representation and/or data set according to the type of user using the system. The lift device data which is displayed to the user can include an amount of torque applied to the lift device, the number of times the lift device has been activated, or any other data point which gives the user an overall snapshot of the performance of the lift device(s) under their control.

Abstract: A pivoting drive socket has a cylindrical body within a sleeve, studs on the sleeve, the studs fitting into a slotted bracket, and the bracket joining to a handle. The slot has an elongated, rectangular shape. The body rotates within the sleeve and has a tab upon one end that receives an external tool. The tab has a shape with at least two flat portions. The bracket permits the handle to engage the tab. The bracket has an opening reinforced by a ring that admits the tab for connection into that handle. The tab has at least two chamfers that grip the bracket during usage. The tab rotates the body which engages a pipe that fits upon a mechanism to raise and to lower trailer legs. The invention allows a trucker to use manual effort or to use power to raise or to lower trailer legs.

Abstract: The present invention relates to a trailer dampening system for dampening during variable road conditions experienced during long hours of travel. Secondly, the trailer dampening system encompasses a universal design that will allow for easy installation and application to multiple trailers. The trailer dampening system is provided having a barrel assembly joined to the trailer, a cylinder rod assembly adjoined to the barrel assembly by a connection assembly wherein a connection assembly first opening is configured to receive a coupler end cap proximal end of the cylinder rod assembly. In some embodiments, there is a reservoir system having a main reservoir, a valve assembly, and at least one connection line. In some embodiments, the trailer dampening system further comprises an electrical control system connected to the valve assembly and having an input device configured to receive an input, a battery, a plurality of sensors, and a microcontroller.

Abstract: This disclosure teaches a device and a system having a gear reduction ratio for use with power tools to mechanically connect to drive shafts of trailer jacks. The device enables the power tools to extend or retract the legs of the trailer jacks in an efficient and easy manner. The device may be installed or retrofitted to existing high capacity trailers or integrated with newly manufactured trailers. In some embodiments, the device has a first interface, a gear train or an equivalent torque magnification mechanism, and a second interface. The first interface enables a power tool or a hand tool to rotationally engage the gear train. The second interface enables the output torque from the gear train to apply to rotate a shaft to raise and/or lower one or more trailer jacks. A power drill can thus couple with the first interface to lift or lower the trailer.

Abstract: An ATV jack may include an adjustable jack leg and an engagement member configured to engage a bracket disposed on an ATV to non-pneumatically lift the ATV to enable changing of a tire.

Abstract: An ATV jack may include a clamping engagement member and a leg which pivots which respect to the clamping engagement member a limited amount to enable the jack to lift and hold an ATV. The leg may telescope to allow the jack to be used at variable heights.

Abstract: A device and method used to raise or lower the landing gear of a semi-trailer. The device is coupled to the landing gear of the semi-trailer and actuates the landing gear according to user selection. The user may select to actuate the landing gear through a motorized gear assembly within the device, by optionally attaching a handle to the landing gear via the device, or by engaging a separate motorized hand tool to the landing gear via the device. To use the handle or the motorized hand tool, the user actuates a shift lever disposed on the device which disengages the related mechanical means for actuating the landing gear. The flexibility for actuating the landing gear allows a user to raise or lower the landing gear according to the surrounding circumstances or in case one of the means for actuating breaks or fails.

Abstract: A trailer stabilizing device for stabilizing a parked freight trailer comprising a frame having mounted thereto at least a right side wheel and a left side wheel, the frame also including a hitch, a fifth wheel, and at least one of a repositionable wheel chock and a repositionable hook, the trailer stabilizing device further including a repositioning device in order to reposition at least one of the repositionable wheel chock and the repositionable hook.

Abstract: A semi-trailer landing gear apparatus employing a handheld power tool is disclosed. The landing gear apparatus is attached to a standard landing gear drive shaft. The landing gear apparatus includes a slip collar drive that allows an operator to use the power tool without removing the hand crank. The power tool has a locking blade which slides into or otherwise engages with a trailer-mounted bracket or bracket mounted on a telescoping arm when the coupler is engaged, preventing rotational movement against the operator as the motor is activated. The power tool also has a quick-release socket assembly which readily connects and disconnects the power tool from the apparatus. A planetary gear system is employed for gear reduction within the power tool. The apparatus may employ a trailer-mounted motor to raise and lower the trailer landing gear.

Abstract: A jack assembly including a telescopic column driven via a gear box, wherein: the gear box is coupled to a rotary input of a drive mechanism that extends and retracts the column; the gear box has only a single input gear and a single output gear that is coupled to the drive mechanism; and the input gear has a connector adapted to be engaged and driven by a portable, hand-held power tool. The invention also relates to a jack assembly with a gear box for use as a jockey wheel for attachment to a towed vehicle, to raise and lower a draw bar of the vehicle.

Abstract: A vehicle includes a chassis, a pair of wheels rotatably mounted to the chassis, and a jack stand having an extended portion and a support portion. The extended portion has a longitudinal axis. The support portion is located at a longitudinal end of the extend portion. The jack stand is arranged on the chassis to be slidable with respect to the chassis in a direction generally parallel to the longitudinal axis for movement between a deployed position, wherein the support portion is located vertically below a bottom surface of each wheel, and a stowed position, wherein the support portion of the jack stand is located vertically above the bottom surface of each wheel.

Abstract: A semitrailer is configured as a mobile presentation enclosure where the semitrailer rests on the ground when detached from a truck which enables individuals to easily access a floor top surface in an interior of the semitrailer by taking one step up onto the floor top surface in the interior of the semitrailer.

Abstract: A jack assembly including a telescopic column driven via a gear box, wherein: the gear box is coupled to a rotary input of a drive mechanism that extends and retracts the column; the gear box has only a single input gear and a single output gear that is coupled to the drive mechanism; and the input gear has a connector adapted to be engaged and driven by a portable, hand-held power tool. A jack assembly with a gear box for use as a jockey wheel for attachment to a towed vehicle, to raise and lower a draw bar of the vehicle is also provided.

Abstract: A travel limiter for landing gear extension legs which employs a pair of mechanically-operable cross-port valves fluidly coupled to the hydraulic circuit, and a pair of supplemental electronic limit switches electrically coupled to the drive motor of the hydraulic circuit, that are operably synchronized for mechanical actuation based on movement of the telescoping upper and lower leg assemblies of the landing gear between respective extend and retract travel stop limit positions. Upon reaching a travel stop limit position, a cross-port valve partially diverts the system's fluid flow away from the drive motor until a limit switch is actuated to cut electrical power and stop fluid flow through the drive motor. If the limit switch fails, the valve completes the fluid flow bypass, thereby permitting all fluid flow to bypass the drive motor and disable the landing gear prior to reaching its final mechanical stop.

Abstract: A wheel changing assembly for safely changing a wheel of a vehicle includes a jack that comprises a first housing. A first power module, a first microprocessor, a pump and a lift are coupled to and positioned in the first housing. The first microprocessor is operationally coupled to the first power module. The pump is operationally coupled to the first microprocessor. The lift is fluidically coupled to the pump. A plate is coupled to a second end of the lift. A plurality of wheels is coupled to a bottom of the first housing. A camera, a plurality of lights and a locator, which are coupled to and positioned in the plate, are operationally coupled to the first microprocessor. The camera is configured to image an underside of the vehicle during placement of the jack. The locator is configured to signal proper positioning of the jack relative to the frame of the vehicle.

Abstract: A support winch, in particular for utility vehicle trailers, is configured to provide for a height adjustment, and comprises a steep thread drive, wherein the steep thread drive comprises a threaded spindle, wherein a pitch of the thread is adapted for rapid height adjustment.

Abstract: A multi-speed landing gear for a trailer includes a housing and a telescoping leg connected with the housing, and a gear assembly for extending and retracting the leg. The gear assembly includes a ring gear arranged to rotate about an axis transverse to the telescopic orientation of the leg member with the gear assembly configured to operate in a high speed setting and a low speed setting and automatically shift between the high and low speed settings, with an actuator selectively preventing or allowing rotation of the ring gear to enable the gear assembly to operate in the low speed setting or the high speed setting. The actuator may be connected to a shift member, with the actuator causing the shift member to selectively prevent or allow rotation of the ring gear by way of engagement of the shift member with the ring gear.

Abstract: An overload protection in a drive unit for a steady or jack for a caravan comprises an electro-mechanical control system. A spindle is driven by a motor through a gearbox, wherein the motor is controlled through a power supply. A control device in the system comprises a movable part slidably seated on an output shaft of the gearbox, where the movable part is connected with the spindle. Movement between the shaft and the sliding part is counteracted by springs. The slidable part is provided with actuating points that may contact switches by axial movements. When a nut on the spindle reaches an end position, a reactive force in the spindle will cause the part to move against the force of springs, eventually actuating a switch and thereby causing interruption of the circuit, thereby protecting motor and engagement between nut and spindle from electric and mechanical overload.

Abstract: A travel trailer stabilizing system having a right and left compound above-axle strut for bracing a trailer body at the axle or axles, each compound strut having an overlever arm for applying a stiffening force with a mechanical advantage to oppose any oscillatory motion of the frame on the tires. The mechanical advantage of the lever is configured to transfer a part of the weight of the trailer from the tires to the rigid struts.

Abstract: A powered converter trolley for movement and attachment of trailers is provided. The trolley comprises a conventional converter trolley having a drawbar. The trolley has a power supply and operates as a towing device. The trolley connects to a freight trailer and can be raised or lowered from a stored position to a ground-engaging, working position. Alternatively, the wheels of the trolley may be powered for providing motion to the trolley. The trolley further comprises several attachment devices for securing the trolley to an intermodal railcar, including alternative hydraulic, mechanical, and electrically-powered tie down devices. A trolley movable along a railcar is provided for securing the trolley or trailer to the railcar and includes a hitch component for selectively interconnecting to a hitch component on the trolley or trailer.

Abstract: A travel limiter for landing gear extension legs which employs a pair of mechanically-operable cross-port valves fluidly coupled to the hydraulic circuit and connected between the telescoping upper and lower leg assemblies to mechanically sense when each travel stop limit is reached. The valves are mounted in the upper leg assembly and are operated by mechanical connection to the movable lower leg assembly. When actuated, each valve cross-ports the system's fluid flow from the valve's inlet port to the system's return line, thereby permitting all fluid flow and power to bypass the power drive motor.

Abstract: The invention relates to a fixing element for locking a hinged hand crank on the input shaft of a support winch for semi-trailers, wherein the hand crank is fastened to the input shaft in an articulated manner and can pivot between at least one folded-in rest position and at least one folded-out usage position. According to the invention, said fixing element has a fastening section for fastening to the hand crank and a spring bar connected to the fastening section on which at least one locking section is formed, wherein the locking section reaches over the end face of the input shaft in a form-fitting manner in a folded-out usage position of the hand crank and is simultaneously pulled against said end face of the input shaft.

Abstract: The invention relates to a supporting device for a semi-trailer or the like, comprising an outer supporting tube and an inner supporting tube, wherein the inner supporting tube is telescopically arranged in the outer supporting tube and may be moved in the axial direction relative to the outer supporting tube by a spindle mechanism mounted inside the outer supporting tube. The supporting device may further comprise an actuating device for actuating the spindle mechanism, which is configured as a separate structural unit and arranged outside of the outer supporting tube. The invention further relates to a semi-trailer having at least one such supporting device as well as an actuating device and a transmission device for use in such a supporting device.

Abstract: A landing gear system for a trailer is described. The landing gear system includes two jacks, each with a first tubular body in which a second tubular body is telescopically mounted, a hydraulic chamber and a pneumatic chamber. The system includes a hydraulic fluid reservoir, a pneumatic fluid source, a pneumatic manifold in pneumatic fluid communication with the pneumatic source and in pneumatic fluid communication with said hydraulic reservoir and a hydraulic manifold in hydraulic fluid communication with the hydraulic reservoir. Pneumatically operated hydraulic pumps are included, along with a central control mechanism attached to the pneumatic manifold and disposed to simultaneously control pneumatic flow into the pneumatic chambers of the jacks and to pneumatically operated hydraulic pumps. Separate pneumatically operated hydraulic valve are provided to individually control hydraulic flow from the jacks.

Abstract: An air driven actuator (100) uses oppositely disposed reciprocating air drivers (122, 124) to cause a single ratchet (146) to rotate via a drive plate (150) and a pawl (170). The ratchet (146) rotates a drive tube (144) that can further extend or retract landing gear on a semi-trailer.

Abstract: A lever system for actuating a plunger pin on a trailer jack includes a lever, an attachment member for attaching the lever to the plunger pin and an engagement member which limits the movement of the lower end of the lever toward the trailer jack.

Abstract: An air driven actuator (100) uses oppositely disposed reciprocating air drivers (122, 124) to cause a single ratchet (146) to rotate via a drive plate (150) and a pawl (170). The ratchet (146) rotates a drive tube (144) that can further extend or retract landing gear on a semi-trailer.

Abstract: A support jack for supporting semitrailers includes a vertically telescopically displaceable supporting device having an outer sleeve and an inner sleeve. A method of assembling such a support jack, in which a spindle nut is connected detachably to the inner sleeve by means of at least one translatory and one rotary joining movement or at least by means of two translatory joining movements.

Abstract: A lever system for actuating a plunger pin on a trailer jack includes a lever, an attachment member for attaching the lever to the plunger pin and an engagement member which limits the movement of the lower end of the lever toward the trailer jack.

Abstract: Disclosed is a gearbox for a powered leg assembly for trailers. The gearbox includes a plurality of gears mounted in a cage, the cage being displaceable from a first low speed position through a neutral position to a second high speed position, and a lever coupled to an eccentric whereby movement of the lever causes displacement of the cage causing the gears to mesh to assume a low speed, neutral and high speed configurations.

Abstract: A length-adjustable telescopic tube (1) has a longitudinal axis (L), an inner tube (2) and an outer tube (4). In one of the tubes (2, 4) a component (20) is arranged, which features first attachment structures (28a, 28b). The tube (2, 4) has second attachment structures. Furthermore, at least one plug-in element (50, 60, and 70) with third attachment structures (58, 68, and 78) is provided, which cooperate with the first (28a, 28b) and second attachment structures (48a, 48b) to form a form-locking connection with the component (20) in at least one direction along the longitudinal axis (L) or perpendicular to the longitudinal axis.

Abstract: A height-adjustable support for semi-trailers and the like includes a shaft tube body, a slidable support inner tube arranged in the shaft tube and body and having a foot mounted to an end region thereof by a nut located on a spindle which is drivable by a transmission, wherein the transmission has a switchable spur gear region and a beveled gear stage. The shifting region of the transmission comprises a low-gear pinion and a fast-gear wheel, wherein the low-gear pinion is coupled to a drive shaft that can mesh with a low-gear gearwheel, the fast-gear gearwheel is adapted to drive a fast-gear pinion, and wherein the fast-gear gearwheel is coupled to the drive shaft. The drive shaft is supported in an unrotatable and axially slidable manner in a sleeve bearing that is supported rotatably in at least a select one of a bearing block or load bearing base supporting the spindle.

Abstract: A landing gear system for a trailer is described. The landing gear system includes two jacks, each with a first tubular body in which a second tubular body is telescopically mounted, a hydraulic chamber and a pneumatic chamber. The system includes a hydraulic fluid reservoir, a pneumatic fluid source, a pneumatic manifold in pneumatic fluid communication with the pneumatic source and in pneumatic fluid communication with said hydraulic reservoir and a hydraulic manifold in hydraulic fluid communication with the hydraulic reservoir. Pneumatically operated hydraulic pumps are included, along with a central control mechanism attached to the pneumatic manifold and disposed to simultaneously control pneumatic flow into the pneumatic chambers of the jacks and to pneumatically operated hydraulic pumps. Separate pneumatically operated hydraulic valve are provided to individually control hydraulic flow from the jacks.

Abstract: The trailer landing gear apparatus may be used for rotating a drive shaft of a landing gear or lifting gear of a land vehicle. There may be a drive shaft connector that may be attachable to a trailer drive shaft, A drive gear apparatus may be mounted on a rotary drive apparatus and a drive apparatus connector may be attached to a drive socket of the drive gear apparatus. The drive shaft may be rotated by positioning the drive apparatus connector on a connector shaft of the drive shaft connector. The rotary drive apparatus may then be operated to rotate the gear elements of the drive gear apparatus to rotate the drive shaft connector. The drive shaft connector may also have a hand crank handle attached to a sleeve for alternate use in drive shaft rotation.

Abstract: An extensible support leg includes at least two reciprocally-slidable portions, a maneuvering screw axially constrained to a first portion, a threaded volute axially constrained to a second portion and screwed on the maneuvering screw, and a rotating drive shaft which is connected to the maneuvering screw by a mechanical gear change, and is rotatable to set the maneuvering screw in rotation. The mechanical gear change includes: two first cogged crown wheels, coaxial and rotatably solid with the maneuvering screw; two second cogged crown wheels mounted coaxially and rotatably idle on the drive shaft, which enmesh directly with a respective first cogged crown wheel, realizing two gears having different transmission ratios; and a cursor, which is solidly rotatably associated to a portion of the drive shaft between the second cogged crown wheels, and is mobile, in a direction of the drive shaft axis, between first and second enmeshed positions.

Abstract: A lifting system and method are disclosed for lifting bulk sized, extremely high weight objects, such as a house, other buildings, skids, chemical plant modules, refinery modules or storage facility, or the like, from one position to another position. The system includes at least one cylinder housing a respective hydraulically actuated, telescoping piston. A lifting plate having an upper face is in operable communication with the piston and is further horizontally offset from the respective piston whereby, when the lifting system is positioned for lifting the high weight object, each of the upper faces may be positioned in close proximity to the ground and under the high weight object at the lifting points, without positioning any of the pistons under the high weight object. A method of operation is also disclosed.

Abstract: A trailer has a body, a primary wheel, and an adjustable leg for providing secondary support. The leg has a terminal end moveable between retracted and extended positions and a secondary wheel rotatably attached to the terminal end, such that the secondary wheel is off the ground when the terminal end is in the retracted position and is in contact with the ground when the terminal end is in the extended position. A pneumatic or hydraulic drive unit is mounted on the trailer body for adjusting the leg to move the terminal end between the extended and retracted positions. A drivetrain is mounted on the trailer body and operatively connected to the secondary wheel for driving the secondary wheel. A controller controls operation of the drive unit to automatically adjust the leg to maintain balance of the trailer, and controls operation of the drivetrain to drive the trailer.

Abstract: The invention relates to a lifting device, comprising a shank tube and a support tube movable with respect thereto, wherein on the shank tube a lifting gear mechanism is arranged which comprises an input shaft arrangement for connecting a drive device and an output shaft arrangement for driving a lifting spindle, wherein the input shaft arrangement comprises a hollow shaft and an axially movable gearshift shaft which is arranged coaxially with respect to the hollow shaft, wherein the hollow shaft serves for the rotationally fixed arrangement of a large-diameter gearwheel, and the gearshift shaft serves for the rotationally fixed arrangement of a small-diameter gearwheel, and engagement devices are provided on the hollow and gearshift shafts which can be put in coupling engagement by axial movement in order to change the transmission ratio.

Abstract: A mechanical hand held door opener device, light in weight and operable in any orientation including being inverted, for generating substantial door-opening force with a minimum effort from a user. When the user rotates the handle, he or she activates the unit by moving the shaft that interlocks with the first and second bevel gears. Since the second gear is fastened to the central lead screw, its rotation causes the rotation of the screw. The rotation of the screw then advances or retracts, depending on the clockwise or anti-clockwise rotation; and the inner platform and the four columns attached to the inner platform moves inwardly or outwardly of the outer platform.

Abstract: The invention relates to a lifting device (10), in particular a semitrailer support or the like, comprising a shank tube (11) and a support tube (12) which is movable with respect to the shank tube, wherein on the shank tube a lifting gear mechanism (26) is arranged which comprises an input shaft arrangement (27) for connecting a drive device, and an output shaft arrangement (28) for driving a lifting spindle (20) which is arranged within the support tube and which acts on a pressure plate (18) arranged within the shank tube, wherein the pressure plate is located above the lifting gear mechanism.

Abstract: Systems and methods are provided for shoring an airplane in order to facilitate the replacement of one or more airplane parts, such as an airplane's upper skin panels, lower skin panels, and/or window assemblies.