Abstract: A landing gear having a telescopic cross shaft extending between the cylindrical stub shafts protruding from both screw jacks thereof. The telescopic cross shaft is made of square structural tubing. The telescopic cross shaft has a pair of end-casing members and a central-stem member. The end-casing members have a combined length of less than a distance between the legs of the landing gear. The end-casing members are slidably engaged over both ends of the central-stem member with loose-fit connections. The end-casing members are also respectively mounted over the stub shafts of the landing gear with loose-fit connections.

Abstract: A supporting leg for a vehicle that transports exchangeable containers comprises two telescopic tubes and a pneumatic drive for retracting and extending one of the tubes. Thread-type or annular bearing parts comprising a horizontal bearing surface are configured on the inner extendable tube. An engagement part with horizontal bearing surfaces, which interacts with the bearing parts, is located on the outer tube. The engagement part is pre-stressed in its displacement from the disengaged position to the engaged position in a spring-loaded manner and is fixed to the outer tube with a non-positive fit.

Abstract: The invention contemplates a selectably operable hydraulic means for laterally shifting one end of a non-moving vehicle in order to provide a desired alignment. The present invention is particularly applicable to vehicle-mounted equipment which has an invariant lateral mounting position on the vehicle and which must be laterally aligned with a stationary workpiece axis. An example of such a need occurs with mobile workover rigs used in well maintenance.

Abstract: A demountable drive mechanism for coupling to a drive shaft of an operating device, the drive mechanism being directly secured to the drive shaft to cause the drive shaft to rotate, the drive mechanism comprising a geared electric motor having an output for coupling to the drive shaft, the drive mechanism having a torque arm adapted to engage a reaction surface so that the electric motor can impart torque to the drive shaft, and a controller to control operation of the electric motor.

Abstract: A dual mode A-frame outrigger for a boom truck or the like is provided wherein the outrigger may be operated in conventional fashion or which may be pinned to the side of the boom truck or the like so that the outrigger assembly may be used to stabilize or level the boom truck without being swung outwardly from the side of the vehicle as in typical A-frame outrigger assemblies.

Abstract: A lift mechanism for a fifth wheel trailer tube and foot pad that is both functional and accessible. A tee handle is made with curved ends and a smooth finish, making it comfortable to grip when lowering or raising the foot pad assembly. A telescoping tube is hollow, allowing a cable to be guided through it and around a pully to an eye bolt that is attached to the foot pad. A cover is provided over the pully to keep the cable securly in the pully groove and direct it to the foot pad using the slotted cutouts in the cover. A main “L” shaped bracket allows the telescoping tube to be mounted at an angle, making it easier for operator reach.

Abstract: A height-adjustable support for semitrailers, having a stationary outer support tube, an inner support tube, which is arranged in a longitudinally displaceable manner therein, and a gearbox output shaft, on which is seated in a rotationally fixed manner a bevel wheel of relatively small diameter which belongs to a bevel wheel gear stage which drives the spindle drive for the purpose of displacing the inner support tube, the drive shaft being hollow at least in its end region opposite the drive side or having a hollow extension fitted thereon.

Abstract: Landing gear for selectively supporting a semitrailer and a method of assembly of the landing gear is provided. The landing gear includes a leg having an upper section and a lower section telescopingly received in the upper section. A lead screw extends and retracts the upper and lower sections relative to each other upon rotation thereof. An input shaft applies a torque to the lead screw to drive rotation thereof, the input shaft being rotatable about a rotation axis and movable in translation along the rotation axis for shifting between a first position for low gear operation and a second position for high gear operation. An output shaft, axially aligned with the input shaft, has an output gear for transmitting torque to the lead screw. A gearing subassembly is received in the upper leg section and is configured to augment lift when the input shaft is in the first position and augment speed in the second position.

Abstract: A wheel mechanism is adapted to move between a stored condition and a use condition on a snowmobile. The wheel mechanism is located adjacent to the front end of the vehicle so the ski runner elements on the front end of the vehicle can be lifted off the terrain when the wheel mechanism is deployed. This will permit the vehicle to be operated on both snow and/or ice covered surfaces and on dry surfaces, such as roads. The wheel mechanism can be altered to adapt to the particular terrain.

Abstract: A manual cranking apparatus for the landing gear of a semi-trailer. The cranking apparatus includes a rotatable mechanism that is permanently connected to the cross-shaft of the landing gear. The rotatable mechanism is adapted to be folded such that, in storage position, the mechanism is positioned beneath the trailer.

Abstract: An automobile pneumatic jack assembly includes at least one pneumatic cylinder assembly capable of lifting a vehicle to a suitable height to allow repairs to tires and other vehicle parts; at least one compressor, at least one distribution manifold assembly, and electrical controls for controlling the operation of the pneumatic jack assembly. The automobile pneumatic jack assembly may include up to four pneumatic cylinders mounted at various locations on an automobile chassis having a frame. The pneumatic cylinder assemblies are preferably mounted to the automobile chassis through the frame by welding, mechanical fasteners, or any other suitable mechanisms.

Abstract: A height-adjustable support for semitrailers, having a stationary outer support tube, an inner support tube, which is arranged in a longitudinally displaceable manner therein, and a gearbox output shaft, on which is seated in a rotationally fixed manner a bevel wheel of relatively small diameter which belongs to a bevel wheel gear stage which drives the spindle drive for the purpose of displacing the inner support tube. Two large-diameter gearwheels are arranged in a rotationally fixed manner on the gearbox output shaft, the gearwheel being located exclusively within the flux of force of the manual drive, which is initiated via the hand crank, and the gearwheel only transmitting the flux of force which is brought about by the motor, which, in a known manner, may be arranged inside or outside the support.

Abstract: An automatic jacking system for automotive vehicles includes four sculpe jacks hingably mounted to the frame of the vehicle adjacent the vehicle wheels and hydraulic and electrical lines that communicate with the jacks for operating and controlling the jacks. The hydraulic lines couple the jacks to a fluid reservoir and pump of the hydraulic system, and the electrical lines extend from individual solenoids mounted on each jack to a control panel wherein an in-line fuse is disposed between the solenoids and the control panel switches for that jack and wheel. The control panel also includes a pressure switch for locking each jack in place, and each jack has an associated leak detection sensor that communicates with the control panel switch associated with that jack so that detection of a leak will cause the control panel switch for that jack to blink on and off thereby alerting the individual of a dangerous condition.

Abstract: Pad assemblies configured to be used in conjunction with stabilizer pads mounted onto stabilizer arms used to stabilize earth moving and other construction equipment. The pad assemblies are formed from either a resilient laminate or solid piece mounted onto a bracket which in turn is mounted onto the stabilizer pad. The pad assemble includes a support bracket, and a pad having a base captured in the support bracket and formed of a resilient material that defines a base surface. The pad is being retained by said support bracket and has a ground engaging surface opposite to the base surface and defined as an uneven ground engaging surface formed of separate ground engaging pad surface areas that terminate at different distances from the base surface.

Abstract: A trailer landing gear drive system in which pneumatic, hydraulic and electric motors, as well as the traditional hand crank, are easily interchangeable. The landing gear jack mechanism is disposed to easily connect to any one of these drive motors. The system can utilize any one of the three motor combinations without making any change to the jack itself. Each drive motor output shaft is keyed to connect to the input shaft driving the worm gear of the jack. The output shaft of each type of motor is keyed the same so that the motors are swappable with respect to the input shaft of the landing gear. The hand crank shaft is also keyed to be the same as the keyed motor output shafts. Each motor may include a flange to permit it to be secured to the landing gear. The system eliminates the gear reduction box and replaced it with a worm gear.

Abstract: A vehicle lifting and wheel removal combination system includes a hydraulic pump mounted on a vehicle. Each of a plurality of hydraulic jacks is fluidly coupled to the hydraulic pump. Each of the hydraulic jacks is mounted to a frame of the vehicle. A plurality of actuators is operationally coupled to the hydraulic pump for selectively positioning each of the hydraulic jacks in an extended position or a retracted position. A plurality of air compressors is mounted to the vehicle and each is operationally coupled to the power supply. Each of a plurality of air lines is fluidly coupled to one of the air compressors. Each of the air lines has a free end having a first mating portion coupled thereto. A pneumatic impact gun for removing lug nuts has a second mating portion for selectively coupling to one of the first mating portions of the air lines.

Abstract: A vertically adjustable landing gear system for a trailer includes a pair of vertically adjustable lifts, a hydraulic motor having a pair of rotational outputs and a pair of landing gear drive shafts, each rotationally engaging one of the respective lifts and one of the respective rotational outputs to vertically adjust the lifts. A relief valve relieves hydraulic pressure to allow manual operation of the lifts in case of hydraulic system failure. An alternate landing gear system includes a single landing gear drive shaft rotationally engaging the pair of lifts and a drive shaft engagement mechanism engaging the rotational outputs and the drive shaft to transfer rotational motion from the rotational output to the drive shaft.

Abstract: An automatic balancing stand and a method for supporting a motorcycle in an upright position are disclosed. The stand comprises a motion sensor coupled to a controller housed in an housing that signals a pump when the motorcycle changes speed. The housing is coupled to a hydraulic pump assembly comprising at least a pump, valve mechanism and hydraulic fluid. The stand further comprises a pair of members which are each coupled to a slidable member coupled to a wheel. Another end of the pair of members is coupled to the hydraulic pump assembly. The motion sensor signals the controller, activating the pump when the motorcycle slows to a preset speed, causing the pump to activate hydraulic pistons within each one of the members, extending the slidable members fully when the motorcycle is stationary. The slidable members are retracted when the motorcycle moves above the preset speed.

Abstract: A landing gear assembly for a semitrailer includes a pair of legs that may be simultaneously raised or lowered by turning a single crank. Each of the legs is configured to be able to be mounted in either an inboard or outboard configuration. This is achieved by providing both sides of each leg with no protrusions that extend beyond the space provided in the mounting bracket and the mounting hole used to connect the landing gear to the semitrailer. The gear assembly of the landing gear includes a unique floor base that receives and supports the input shaft. A cover is used to support the input ends of the input shaft and the output shaft. The cover is connected to the input side of the upper tube of the leg and allows the gear assembly to be easily assembled within the perimeter of the upper leg.

Abstract: A support strut for mobile working machines, especially for mobile concrete pumps. The support strut (20) has a strut body (38) that can be pivoted around a vertical pivoting axis (32) on a chassis (10), a telescopic part (40), a dual-acting hydraulic cylinder (42) (38) and the telescopic part (40), in addition to a foot part (26) that. Both ends of the telescopic hydraulic cylinder (42) are fixed on fixing points (46, 50) in the area of the opposite ends of the body of the strut (39/8) and the telescopic part (40). The vertical pivoting axis (32) is defined by a divided bearing or journal location arranged at an axial distance (S) from the inboard fixing point (46) in the direction of the foot part on the body of the boom (38), said location being positioned in such a way that it transects the displacement axis (52) of the hydraulic cylinder (42) transversely.

Abstract: A fire engine having an extension ladder mounted thereto, wherein said extension ladder may be rotated through a full 360 degrees while the ladder is fully extended—regardless of the vertical angle or position of the ladder with respect to the longitudinal axis of the fire engine. The ladder is mounted to the fire engine between a forward portion and a rearward portion. The fire engine employs at least two sets of vertically offset and laterally extendable stabilizers, that are adapted to communicate with the ground and stabilize the fire engine while the ladder is in use. The stabilizers are mounted substantially beneath the mounting point of the ladder and are designed to reside within the width of the fire engine body when retracted. Each set of stabilizers is arranged to diverge in the direction of extension in order to provide maximum stabilization to the fire engine.

Abstract: In a vehicle with a superstructure having at least one swiveling mast on a slewing gear and a frame support with the aid of front and back movable telescopes disposed on each side of the long sides of the vehicle, their stationary telescopes being disposed at least partly in an arc tangentially to the longitudinal direction of the vehicle and extending in each case from one of the long sides of the vehicle profile inward substantially as far as the middle of the vehicle and then on to the same long side of the vehicle profile, it is provided according to the invention that the stationary telescopes of the front and back movable telescopes of each long side of the vehicle are realized with a common carrier and disposed one behind the other such that the movable telescopes emerge from the associated ends of the carriers.

Abstract: A method and apparatus for retracting a support leg includes a telescoping inner leg member contained in an outer leg member. A spring-loaded pin engages the inner leg member. To lower the leg, the spring-loaded pin is removed allowing the inner leg member to extend to a desired position. When in the desired position, the spring-loaded pin is released and the pin reengages the inner leg member. To raise the inner leg member, the spring-loaded pin is removed until a slidable trip member falls. The slidable trip member then blocks the spring-loaded pin from reengaging the inner leg member. The inner leg member is raised, the trip member lifted, and the inner leg member secured in a proper position for travel. The inner leg member can be raised by a cable attached to the inner leg member to allow one-handed operation of the entire system.

Abstract: An arrangement of a motor (1) on twin landing gears (2a, 2b) is described. The landing gears (2a, 2b) are interconnected via a connecting shaft and can be telescoped by starting up the motor (1). To minimize damage to the motor and at the same time to ensure cost-effective production, it is provided that the motor (1) with its driveshaft (5) engages with the connecting shaft (4) and is supported on a component that is fixed relative to the motor (1).

Abstract: A stabilizer for a heavy equipment machine includes a pair of resilient pad assemblies each having opposed surfaces either of which can be positioned as a ground engaging surface, and a support pin that extends in opposed directions from a stabilizer arm of the machine. Each of the resilient pad assemblies has a respective passage for receiving the support pin for enabling rotational support of the resilient pad assemblies from the support pin. The support of the resilient pad assemblies enables the positioning of either of the opposed surfaces as the ground engaging surface.

Abstract: Landing gears of support devices for articulated vehicle trailers are frequently left in neutral position while the articulated vehicle is being driven. The vibrations which occur during driving can cause the landing gear to descend unintentionally, touch the ground and be damaged. The invention provides a support device with a landing gear which is reliably prevented from descending. To this end, the toothed ring of the input shaft (1) has two longitudinal sections (1a, 1b) of different diameters while having constant tooth spacing throughout. The tooth length in both sections (1a, 1b) is dimensioned in such a way that in neutral position, the input shaft (1) can rotate while the toothed wheel (3a) remains stationary but is prevented from rotating while the input shaft (1) remains stationary.

Abstract: A trailer having a length varied by the extension of beams from an extendable end. The trailer is further defined by having a saw on the extendable end and a crane for holding trees on the other end, which is typically a low end. The trailer also has, at the extendable end, hydraulicly controlled supports for leveling the trailer at the extendable end. The trailer is also defined as being extendable in width as well as the length.

Abstract: A trailer landing gear drive system is disclosed in which pneumatic, hydraulic and electric motors, as well as the traditional hand crank, are easily interchangeable. The landing gear jack mechanism is disposed to easily connect to any one of these drive motors. The system can utilize any one of the three motor combinations without making any change to the jack itself. Each drive motor output shaft is keyed to connect to the input shaft driving the worm gear of the jack. The output shaft of each type of motor is keyed the same so that the motors are swappable with respect to the input shaft of the landing gear. The hand crank shaft is also keyed to be the same as the keyed motor output shafts. Each motor may include a flange to permit it to be secured to the landing gear. The system eliminates the gear reduction box and replaces it with a worm gear.

Abstract: A landing gear leg adapted for mounting to a vehicle has an outer member, and a middle member telescoped slidably into the outer member. The middle member has a first end and a second end. The first end extends beyond the outer member. An inner member telescoped slidably into the middle member has a first end positioned within the outer member and a second end extending beyond the outer member. A locking mechanism locks the middle member in a fixed relationship with the inner member, and a drive mechanism slidably drives the inner member in relationship with the outer member from a retracted position to an extended position. A rack and pinion drive may be used to slidably move the leg between an extended and retracted position providing a simplified drive mechanism.

Abstract: A demountable drive mechanism for the landing gear of a semi-trailer, the landing gear including legs that are extendable and retractable by rotation of a drive shaft through a gear mechanism, the drive shaft being axially displaceable to change the ratio of the gear mechanism, the drive mechanism comprising an electric motor having an output shaft adapted to be coupled to the drive shaft of the landing gear assembly, the electric motor being coupled to the landing gear through a torque arm so that the electric motor can impart torque to the drive shaft, means to axially displace the drive shaft to change the gear ratio, and means to control operation of the electric motor and axial displacement of the drive shaft.

Abstract: An apparatus for assisting in the operation of a conventional trailer jack. The jack assistance apparatus is attached to a conventional trailer jack having telescoping tubes with a coarse adjustment and a fine adjustment. The apparatus includes a lever arm that engages a locking pin handle on the jack, and a guide tube that contains a chain or other flexible member with one end attached to the jack base and the other attached to a handle. The lever arm and handle are located for convenient access by an operator for coarse vertical adjustment of the jack.

Abstract: A system for stabilizing a trailer such as a caravan, when parked, or for raising and lowering a pop-top or a television antenna on a caravan, the system having at least one four water actuated ram, and being operable from water supplied from a water tap 47 (faucet) at a camp ground/caravan park. A valve 19 in the supply line 33 prevents loss of water and hence inadvertent actuation/deactuation of the water actuated rams. A selector valve 21 allows selection between extend and retract operations. In the case of a system for stabilizing a trailer such as a caravan when parked, or for raising and lowering a pop-top on a caravan there are at least two water actuated rams and preferably four water actuated rams 11, 13, 15, 17 connected in parallel.

Abstract: A combination trailer crank and locking mechanism. The device includes a crank portion having a handle portion separated from a coupler portion by a generally S-shaped body portion. When the coupler portion of the device is coupled with a rotatable shaft of a retractable leg assembly of a trailer, the crank portion facilitates the raising and lowering of the trailer's legs. The device also includes a locking portion which is connected to the crank portion in a transverse orientation. When the device is connected to the rotatable shaft of the trailer by the locking portion, the crank portion will abut an underneath side of the trailer and prevent rotation of the rotatable shaft, thereby preventing a person from being able to raise and lower the retractable legs of the trailer.

Abstract: Landing gears of support devices for articulated vehicle trailers are frequently left in neutral position while the articulated vehicle is being driven. The vibrations which occur during driving can cause the landing gear to descend unintentionally, touch the ground and be damaged. The invention provides a support device with a landing gear which is reliably prevented from descending. To this end, the toothed ring of the input shaft (1) has two longitudinal sections (1a, 1b) of different diameters while having constant tooth spacing throughout. The tooth length in both sections (1a, 1b) is dimensioned in such a way that in neutral position, the input shaft (1) can rotate while the toothed wheel (3a) remains stationary but is prevented from rotating while the input shaft (1) remains stationary.

Abstract: Pad assemblies configured to be used in conjunction with stabilizer pads mounted onto stabilizer arms used to stabilize earth moving and other construction equipment. The pad assemblies are formed from either a resilient laminate or solid piece mounted onto a bracket which in turn is mounted onto the stabilizer pad. The pad assemble includes a support bracket, and a pad having a base captured in the support bracket and formed of a resilient material that defines a base surface. The pad is being retained by said support bracket and has a ground engaging surface opposite to the base surface and defined as an uneven ground engaging surface formed of separate ground engaging pad surface areas that terminate at different distances from the base surface.

Abstract: A landing gear assembly for a semitrailer includes a pair of legs that may be simultaneously raised or lowered by turning a single crank. Each of the legs is configured to be able to be mounted in either an inboard or outboard configuration. This is achieved by providing both sides of each leg with no protrusions that extend beyond the space provided in the mounting bracket and the mounting hole used to connect the landing gear to the semitrailer. The gear assembly of the landing gear includes a unique floor base that receives and supports the input shaft. A cover is used to support the input ends of the input shaft and the output shaft. The cover is connected to the input side of the upper tube of the leg and allows the gear assembly to be easily assembled within the perimeter of the upper leg.

Abstract: A portable electric drive for a trailer landing gear lifting apparatus includes a trailer having a landing gear lifting apparatus having a hand crank engaging member for coupling to a portable electric drive. A base plate has an electric motor attached thereto for driving a drive shaft extending therethrough. A hand crank engaging member coupling is attached to the electric motor driven shaft and positioned to engage the hand crank engaging member. The base plate has a handle attached to one side thereof for supporting the trailer landing gear portable electric drive. A support member is attached to the trailer adjacent the landing gear hand crank engaging member and has a pair of openings therethrough having a sleeve attached to the support member over each opening. The base plate has a pair of support arms fixedly attached thereto each aligned for insertion one of the openings in the support member and into the attached sleeve for supporting and aligning the portable electric drive.

Abstract: A demountable drive mechanism for the landing gear of a semi-trailer, the landing gear including legs that are extendable and retractable by rotation of a drive shaft through a gear mechanism, the drive shaft being axially displaceable to change the ratio of the gear mechanism, the drive mechanism comprising an electric motor having an output shaft adapted to be coupled to the drive shaft of the landing gear assembly, the electric motor being coupled to the landing gear through a torque arm so that the electric motor can impart torque to the drive shaft, means to axially displace the drive shaft to change the gear ratio, and means to control operation of the electric motor and axial displacement of the drive shaft.

Abstract: The invention is a stabilization system for a fifth wheel trailer that prevents rocking and swaying of the trailer when parked. The rear end of the trailer is supported by a pair of adjustable supports that have a top railing joining them. The rail is moveably mounted on the two supports and is secured to the under side of the trailer. Each of the supports is independently adjustable to lower it to the ground. A pair of cross-braces connect the top of one adjustable support to the base of the other support to prevent swaying of the trailer when parked. A tripod type support is placed under the front end of the trailer to support the front end and to eliminate swaying at the front end of the trailer.

Abstract: A mobile work machine, especially an automatic concrete pump. The mobile work machine is arranged on a chassis (10) which has at least one preferably horizontally arranged telescopic segment (18) configured as a sliding housing, as well as a supporting strut (20) displaceable in said telescopic segment between a stowed transporting position and at least one extended position, the supporting strut supportable on the ground (28) via a foot element (26). In order to enable easy adjustment of the supporting strut width, it is proposed in accordance with the invention that the telescopic segment (18) consists of an inner segment part (44) fixed to the chassis and an outer segment part (48) which can be limitedly pivoted around an axis (46) parallel to the vertical axis of the chassis.

Abstract: The mobile working machine has a chassis (10) comprising at least four wheels (30) arranged in pair-wise associated with wheel axles (32) and connected to a frame (36) by interposed wheel springs (34) pre-tensionable by the effect of a load exerted on the frame. Two support legs (22) are also provided laterally one opposite the other on the sides of the frame, associated with one of the wheel axles (32), preferably the back axle, which have a foot-part (26) which can be extended downward and supported on the ground thereby lifting the chassis. At least one blocking mechanism is also provided to selectively release or block the spring path of one of the wheel springs (34). In order to ensure reliable and safe manipulation during blocking of the axle, the blocking mechanism (38) automatically moves in the blocking direction when the foot-part (26) is pulled out and automatically moves in the release direction when the foot-part (26) is retracted.

Abstract: A mobile machine, especially a self-propelling concrete pump, comprising a chassis (10) and at least one support strut (20) displaceable in a preferably horizontally oriented tubular or box-shaped telescopic section (18) between a retracted transport position to at least one extended support position, and supportable on the ground via a foot part (26) provided at its free end. In order to alter the support width across the support strut, in accordance with the invention, the support strut (30) has at least two strut parts (40, 42) which can pivot around an articulated axis (46), the axis being parallel to the vertical axis of the vehicle chassis (10).

Abstract: A system for stabilizing a trailer such as a caravan, when parked, or for raising and lowering a pop-top or a television antenna on a caravan, the system having at least one four water actuated ram, and being operable from water supplied from a water tap 47 (faucet) at a camp ground/caravan park. A valve 19 in the supply line 33 prevents loss of water and hence inadvertent actuation/deactuation of the water actuated rams. A selector valve 21 allows selection between extend and retract operations. In the case of a system for stabilizing a trailer such as a caravan when parked, or for raising and lowering a pop-top on a caravan there are at least two water actuated rams and preferably four water actuated rams 11, 13, 15, 17 connected in parallel.

Abstract: A pallet truck for manually transporting loaded pallets is provided with a momentary locomotion means that assists an operator in starting a load moving from a state of rest. The locomotion subsystem is of suitable weight and size to allow the power-assisted pallet truck to be manually operated, and to allow for use of the pallet truck in similar space constraints as manual pallet trucks. In an enhanced embodiment, a governor switch is provided which disables the power-assistance after the load has been accelerated to walking speed in order to protect the motor from use as a full-time locomotion means.

Abstract: A trailer landing gear lifting apparatus (100) for raising and lowering landing gear (10) of a trailer (30) has a motor (136) fitted to a motor plate (134) which is affixed to a modified conventional gear housing cover (130) of a trailer landing gear assembly (10). The motor (136) has a motor gear (154) affixed to a motor shaft (156) by a roll pin (158). The motor gear (154) engages a drive low gear (142) of a generally conventional gear system (136). A spacer on a drive shaft 138 locks the gear system (136) such that the drive low gear (142) engages a driven low gear (146). A key switch (172) controls a pair of solenoids (170) to selectively provide power to the motor (136) for raising and lowering the legs (14) of the landing gear assembly (10).

Abstract: An automatic fifth wheel loading and unloading system which is designed to automatically unlock and disengage a trailer from the fifth wheel apparatus in a towing vehicle such as a pickup truck and level and then recouple the trailer to the vehicle. The automatic fifth wheel loading and unloading system initially raises the trailer coupler a predetermined distance, unlocks the trailer hitch mechanism in the fifth wheel and opens it on command. The truck or towing vehicle is then pulled forwardly from beneath the trailer coupling mechanism and the trailer is automatically lowered into a level position. When the trailer is to be recoupled to the towing vehicle, the trailer is automatically raised to an access position by operation of a memory circuit, the truck is positioned such that the fifth wheel mechanism is located beneath the trailer coupling mechanism and the trailer coupling mechanism is automatically lowered into engagement with the fifth wheel.

Abstract: An automatic jack and wheel change system having at least one inverted jack driven by an electric motor permanently attached to the vehicle. The system may employ a jack disposed between the front and rear wheel on each side of the vehicle, or it may be equipped with a jack at each of the four wheels. The system also features a novel wheel and hub-axle assembly featuring a split axle whose length may be adjusted by operation of an electric motor. The hub has a plurality of arms extending from the hub in a star-shape, each arm having a finger at its free end. The wheel has a plurality of slots defined therein so that the wheel may be removed by aligning the slots with the arms on the hub and pulling the wheel off when the axle is extended, and a plurality of holes defined therein for receiving the fingers to lock the wheel on the hub when the axle is retracted. Both the motor for raising the jack and the motor for adjusting the length of the axle may be operated by remote control.

Abstract: A powered landing gear drive system for a trailer for selectively extending and retracting the landing gear legs of the trailer. An electric motor is powered by a battery carried by a tractor or by the trailer and provides the power for an electric motor. A control system is provided as a security measure to permit limited, coded entry access to the system, and motor operating parameters are sensed to prevent exceeding operating limits of the system. The powered landing gear system can be provided as original equipment, or it can be retrofitted to existing trailers to permit powered landing gear operation.

Abstract: An accident prevention system for vehicles for stabilizing a vehicle when a tire loses pressure. The accident prevention system for vehicles includes a plurality of piston and cylinder actuators each positioned towards a unique tire of a vehicle. Lower ends of the piston and cylinder actuators are adapted for engaging a ground surface when the pistons are in an extended position. A plurality of sensors are each positioned towards a unique tire of the vehicle. Each of the sensors becomes activated when the associated tire goes flat. Each piston moves towards an extended position when the associated sensor is activated.

Abstract: A truck stabilizer system is provided including a truck having a cargo container with a top face, a bottom face, a front face, a rear face, and a pair of side faces. A plurality of arm assemblies is coupled to the cargo container and have a wheel rotatably coupled to an end thereof. Each arm assembly is adapted to lengthen upon the actuation thereof and further retract upon the deactuation thereof.