Abstract: An integrated vehicle jacking assembly includes a plurality of jacks that is each coupled to a bottom side of a vehicle. Each of the jacks is actuatable into an extended position for lifting a respective driver's side or passenger's side of the vehicle upwardly thereby facilitating tires on the respective driver's side or passenger's side of the vehicle to be removed and replaced. A control unit is positioned within the vehicle and the control unit is operationally coupled to each of the jacks. The control unit actuates one or both of the jacks between the extended position and the retracted position. A plurality of wheel chocks is provided for inhibiting the vehicle from rolling when the vehicle is lifted.

Abstract: A hitch assembly includes a support extendable into a receiver tube attached to a vehicle. A sleeve has a top end and a bottom end. A bracket is attached to the sleeve and is attached to the support to vertically orientate the sleeve. A piston is positioned in the sleeve and extends outwardly of the bottom end. The piston has a lower end that is moveable toward or away from the bottom end. An actuator is mounted on the sleeve and is mechanically coupled to the piston. The actuator is actuated in a first direction to lower the lower end and actuated in a second direction to raise the lower end. A ball mount is removably attached to the piston adjacent to the lower end. A hitch ball is attached to the ball mount and engages a hitch coupler of a trailer.

Abstract: A stabilizer arrangement for mobile apparatus such as an access platform having a chassis with a functional component movably mounted thereon for movement between a rest position and a use position, comprises a stabilizer member movably mounted with respect to the chassis and having a ground-engaging portion, the stabilizer member being movable between a retracted condition in which the ground-engaging portion does not engage the ground and a deployed condition in which the ground-engaging portion engages the ground, the stabilizer member and functional component being mechanically interconnected such that, in use, initial functional movement from the rest position of the functional component relative to the chassis causes movement of the stabilizer member from the retracted condition to the deployed condition.

Abstract: A semi-trailer landing gear, in particular for trailers of utility vehicles, wherein the semi-trailer landing gear extends along a longitudinal axis and comprises an outer supporting tube and/or a transmission box, wherein the outer supporting tube and/or the transmission box comprise an outer wall, and wherein the outer wall comprises a fastening side, wherein at least one fastening portion is formed in the region of the fastening side, and wherein the fastening portion is designed to fasten and/or to arrange the semi-trailer landing gear on a further element, in particular a trailer, characterized in that a transmission is arranged in the transmission box, which transmission is coupled to a spindle drive, in that the fastening portion comprises at least one fastening element, and/or in that the fastening portion comprises at least one arrangement portion for arranging and/or fastening the at least one fastening element, and in that a ratio of a distance between the fastening elements and/or the arrangement

Abstract: A lever system for actuating a plunger pin on a trailer jack includes a lever which selectively actuates a plunger pin of the trailer jack. In one configuration 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. In another configuration, a lever attachment member is used to hold the lever to the jack, and a pin engagement member engages the pin to move it into an open position when the upper end of the lever is moved toward the jack.

Abstract: Jack units are employed to attach skates to an object to be moved. Each jack unit has a tongue that slidably engages a coupling slot affixed to the object, and can be operated to raise or lower the tongue; when raised, the object is supported on the skates and can be rolled to a new location. A crane can attach to lift eyes on the jack units to allow the system to be lifted with the skates attached to the object, avoiding the risk of positioning the skates while the object is suspended. Rotation-limiting structures can be employed to block rotation of the trailing skates to facilitate steering when rolling the object supported by the system. The coupling slots can be provided in coupling elements which can attach directly to the object or which can be employed to form a freestanding frame to which the object is secured.

Abstract: Devices and systems for securing and locking tractor trailer support legs in the down position are described herein. A securing pin passing through one of the support legs of a trailer while in the down position prevents the trailer legs from being raised. The pin can be locked in place such that only authorized users may remove the pin, raise the support legs, and move the trailer. A variety of kits for retrofitting existing trailers with securing devices are also provided.

Abstract: A mobile frame assembly includes a trailer assembly having a trailer body, a draw assembly and wheels. The mobile frame assembly includes a base assembly, an intermediate assembly and an upper assembly each having at least two primary rails. Lower support risers are coupled to the base assembly primary rails and extend to the intermediate assembly primary rails forming a lower frame assembly. Upper support risers are coupled to the intermediate assembly primary rails and extend at least to the upper assembly primary rails. A platform assembly including a launch platform, a landing platform and a safety pit positioned therebetween is disposed at least partially within the lower frame assembly. An obstacle assembly is disposed generally within the mobile frame assembly over the safety pit, wherein at least some of the upper support risers are telescoping members operable to expand the distance between the obstacle and the safety pit.

Abstract: A leg lifting mechanism for a table saw including a circular saw blade extending upward from an upper cutting surface, and a base mounted under a stand, the base having first and second leg assemblies, a first wheel assembly pivotably secured to the first leg assembly, and at least two second wheel assemblies secured to the second leg assembly is provided with a foot pedal including two side flanks pivotably secured to the first leg assembly, each of the side flanks having a straight edge and a cam edge. Clockwise rotation of the foot pedal about the first wheel assembly inward moves the cam edges on top of the first wheel assembly until portions of the straight edges grappingly engage the top of the first wheel assembly and portions of the first and second leg assemblies are lifted above the supporting surface.

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: A jockey wheel includes at least one ground engaging wheel; a mount for mounting the jockey wheel to a frame of a trailed vehicle; a jockey wheel post carrier for carrying a jockey wheel post; a coarse height adjuster for coarsely adjusting the height of the jockey wheel post, wherein the coarse height adjuster includes a locking selector for selecting a jockey wheel post height, the locking selector being biased into a locking position.

Abstract: A jack for use with a towed vehicle is disclosed. The jack may include a first housing, a pair of cam surfaces, and a second housing telescopically moveable relative to the first housing. The jack may also include a pair of engaging members positionable to a first position generally inhibiting relative telescopic movement between the first and second housings and a second position generally not inhibiting relative telescopic movement between the first and second housings, and a handle attached to the engaging members, where the handle is selectively positionable along the cam surfaces positioning the engaging members to the first and second positions.

Abstract: A system for supporting a vehicle. The system may include a vehicle jack in mechanical communication with a jack foot and a striker plate. The jack foot is rotatable relative to the vehicle jack on a rotation axis disposed on the vehicle jack and perpendicular to a long axis of the vehicle jack. The jack foot includes a base at a distal end of the jack foot. The jack foot also includes a cam surface at least in part at a proximal end of the jack foot. The cam surface is aligned with the striker plate and interacts with the striker plate to rotate the jack foot in response to movement of the vehicle jack from a lowered position to a raised position.

Abstract: The power drive includes a housing enclosing a gearing system and a motor. The housing is mounted under the floor of a transport trailer. A drive shaft extends outside the housing for connection in series with a cross shaft of the landing gear of the trailer. A gear shift actuator is mounted in the gearing system for engagement or idling of the gearing system. The gear shift actuator comprises a rod that is movable in and out of the driver side of the housing. A handle lock saddle is mounted to the driver side of the housing for retaining a crank handle of the landing gear thereto. The saddle is centered on the rod such that the rod must be pushed inward for mounting the crank handle to the handle lock saddle. The gearing system is inoperable if the crank handle is not securely stowed to the handle lock saddle.

Abstract: Latching motion transfer arrangements may be used to raise an object up and out of the engagement with the ground or other support surface and to lower the object back onto the ground or other support surface. In one exemplary embodiment, the mechanism is caused to lift and latch by applying force in a first direction, a first time, and is caused to release and lower by applying force in the first direction, a second time.

Abstract: A selectively positionable lifting system for a utility trailer, or the like, in which a jacking system is selectively attachable to a strategic position of the utility trailer in order to lift said trailer at the jack point for maintenance and repair purposes, the jacking system being easily removed and stowed when not in use.

Abstract: Apparatus and methods allow the wheels of a camera dolly to be quickly and easily changed by a single person. A dolly jack may have a leg attached to a foot and pivotable relative to the foot about a first axis. A jack rod is attached to the leg spaced apart from the first axis. An arm may be pivotally attached to the leg as desired, to provide greater mechanical advantage in lifting the camera dolly. Dolly wheels may be changed by inserting a jack rod into a receptacle on one side of the camera dolly, with the foot of the jack on the ground and with the jack leg substantially in a non-vertical position. The jack leg rotated into a second position wherein the jack leg is substantially vertical, with the dolly rolling slightly in the direction of the rotation. This lifts the side of the dolly sufficiently so that the front and back wheels, or wheel pairs, on the one side of the dolly are lifted off of the ground, allowing the wheels to be changed.

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 jack includes an outer tube, an inner tube and a lifting device. The outer tube has a positioning member and a driving rod connected thereto. The positioning member is positioned by an object and the driving rod is driven by a crank. The inner tube is located in the outer tube and the lifting device is located on the top of the inner tube so as to lift the outer tube. The positioning member is located on the top of the outer tube and the driving rod is located below the positioning member. The positioning member is positioned by a pivotal device which pivots the positioning member to a desired angle and positions the positioning member.

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 system for preventing a vehicle theft has vehicle having wheels, and means for lifting the vehicle when it is left by an owner or a driver so that the wheels are located above a ground so that a thief cannot driver or move the vehicle with the wheels in contact with the ground.

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 system for determining when one or more jacks on a vehicle have contacted the ground. The system includes at least one of a pitch sensor that senses a pitch angle of the vehicle and a roll sensor that senses a roll angle of the vehicle. A jack extension system operatively associated with the vehicle jacks extends and retracts the one or more jacks on the vehicle. A control system operatively associated with the pitch sensor, the roll sensor, and the jack extension system monitors the pitch and roll sensors to determine the pitch and roll angles of the vehicle. The control system operates the jack extension system to lower the jacks to the ground and determines that the jacks have contacted the ground based on detected changes in the pitch and roll angles of the vehicle.

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 present invention relates to an anti-theft system for a camper. The camper is supported at its front end by a pair of spaced-apart jacks. The system includes a barrier having a first end operatively connecting to a first one of the jacks and a second end opposite thereof. The second end of the barrier operatively connects to a second one of the jacks. The barrier extends in a horizontal direction and is positioned and configured to prevent an unauthorized vehicle from passing underneath the camper and mounting of the camper onto the vehicle.

Abstract: A foot device (29) for supporting a support device or lifting device, in particular a semitrailer support or the like, comprising a foot receptacle (31) for connecting a pivoting foot (32) to a support tube (12) of the lifting device (10), wherein the foot receptacle comprises an insertion body (120) for insertion into the support tube, comprising, in two support tube engagement areas spaced apart from one another by a spindle passage area (143) of a lifting spindle (20), bracket receptacles (123,124) for receiving pivoting brackets (130,131) of the pivoting foot, wherein the pivoting brackets are connected in a captive manner to the insertion body along a pivoting axis (136), and the bracket receptacles comprise counter support faces (133) which are arranged concentrically with respect to the pivoting axis and which, for transmitting the supporting forces, correspond with respective support faces (132) formed by the outer contour of the pivoting brackets.

Abstract: The invention relates to stabilizers for use with a vehicle. The quick release coupling system entails a pair of grooved plates that can easily attach and detach with respect to one another. The top plate of the coupling system is mechanically attached to the frame of the vehicle and a bottom plate is mechanically attached to a conventional stabilizer. These grooved plates create a quick release coupling joint that facilitates attachment and removal of the stabilizers from the vehicle.

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.

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 rests with one end on a pressure plate (18) arranged within the shank tube and interacts with the moving end with a spindle nut (25) arranged in the support tube, wherein the spindle nut comprises a locking collar (90) with at least two locking devices (107, 108, 109, 110) which interact with locking latches (103, 104, 105, 106) formed on the tube wall of the support tube in such a manner that, with a coaxial alignment of the spindle nut with the support tube, the spindle nut can be inserted, in an assembly rotational angle position, into the suppo

Abstract: In a ball screw device, a ball screw linear-movement member is screwed with a ball screw rotary member and configured to linearly move in accordance with a relative rotation with the ball screw rotary member. A housing is holding the ball screw rotary member. A motor is disposed in a motor chamber of the housing, and configured to rotate the ball screw rotary member with a rotor coupled to the ball screw rotary member. A stopper is configured to collide with a brake when an amount of a relative linear movement between the ball screw rotary member and the ball screw linear-movement member becomes no less than a prescribed amount. The brake is configured to decelerate rotation of the rotor by the collision of the stopper with respect to the brake.

Abstract: An apparatus for lifting a wheelchair, the wheelchair including a frame with first and second rear frame members and first and second front frame members, the apparatus including a ground-engageable base; a chair connection assembly having connection means for securely connecting to the frame of a wheelchair; a lift assembly having first and second lift members, the first lift member connected with the chair connection assembly and the second lift member connected to the base; power means connected with the lift assembly for moving the lift assembly between a retracted, down position and an extended, up position; and a lift control assembly for connecting the power means with the lift assembly and for controlling the lift assembly.

Abstract: A mounting adapter for mounting a jack to a trailer coupler and/or a trailer frame is described. The mounting adapter may permit the jack to mount to the trailer coupler while retaining both vertical and axial adjustability. The mounting adapter may include a flange and a collar. The flange may include an opening for receiving the jack and at least one mounting aperture for attachment with the trailer frame. The collar may extend outward from the flange and have at least one aperture for attachment with the jack. The collar may also include a rib located for engagement with a slot on the jack. The trailer coupler and frame may include apertures alignable to the mounting apertures, whereby the mounting apertures may permit orientation of the jack to be forward, left, right or rear facing. The mounting adapter may also be vertically adjustable to the jack.

Abstract: A vehicle lifting system comprising a mechanism fixedly disposed within a center pillar at the side of a vehicle, for extending out of the pillar and exerting a downward force onto the surface on which the vehicle is positioned. When the force is exerted on the surface, the side of the vehicle is lifted above the surface. A control device is utilized for selectively extending the mechanism out of the pillar and retracting the mechanism back into the pillar.

Abstract: A shock absorber housing for a shock absorber of a vehicle comprises a tube, which has a tubular wall, and an attaching element joined onto the tubular wall, the attaching element determining a critical force introduction area of an introduction of a force into the tubular wall, the tube in a longitudinal direction being built up from a first tube section having a first tubular wall and at least a second tube section having a second tubular wall, the first tube section and the second tube section being joined together by their ends facing one another. The first tube section and the second tube section are joined together with a tubular wall overlap of the first and second tubular wall, which overlap extends in a longitudinal direction, the tubular wall overlap being situated in the critical force introduction area of the attaching element.

Abstract: A portable lifting apparatus includes a base having a portability system rendering the apparatus movable along a surface; a lift arm connected to the base; a deck to support an object, and being moveably engaged with the lift arm via a lifting system that is adapted to lift the deck along a portion of the lift arm; and a hitch connector, connected to the deck, and adapted to hitch the apparatus to a vehicle hitch receiver. When the apparatus is not hitched, the lifting system can lift the object from a first position to a second position; and when the apparatus is hitched, the lifting system can lift the apparatus above the surface.

Abstract: An auxiliary system for operating at least one motor operatively connected to first and second legs of a 5th Wheel RV comprising a calibration system that stores level position angular displacement data when the 5th Wheel RV is in a substantially level position and disconnect position angular displacement data when the 5th Wheel RV is in a disconnect position, a disconnect system stores pre-disconnect position angular displacement data immediately prior to disconnection of the 5th Wheel RV from the vehicle and operates the first and second motors based on the disconnect position angular displacement data and pre-disconnect position angular displacement data to displace the 5th Wheel RV to allow the 5th Wheel RV to be detached, and a leveling system operates the first and optionally second motors based on the level position angular displacement data to place the 5th Wheel RV in a substantially level position.

Abstract: Latching motion transfer arrangements may be used to raise an object up and out of the engagement with the ground or other support surface and to lower the object back onto the ground or other support surface. In one exemplary embodiment, the mechanism is caused to lift and latch by applying force in a first direction, a first time, and is caused to release and lower by applying force in the first direction, a second time.

Abstract: A slidable adjustable jacking device where the numbers of rotations of a hand crank on a jacking device may be greatly reduced by using a slidable screwjack inner member to re-position a load-carrying member. New in the art is the use of a slidable screwjack inner member and an affixed bar within a tubular outer member and an affixed passageway. This invention re-positions a slidable screwjack inner member to a location and then pins the member such that the member is fixed relative to a trailer. The device is useful for raising or lowering the tongue of a trailer.

Abstract: A controller commands a jack drive to extend and retract a jack leg relative to a jack base along a stroke having retraction and extension limits. The controller updates a perceived present leg position value in response to position change signals from a position change sensor. The controller occasionally applies compensation factors to the perceived present leg position value in the extension direction. The controller resets the perceived present leg position value whenever the jack leg reaches the retraction limit.

Abstract: An anodized aluminum hydraulic leveling cylinder 10 for a vehicle includes an extruded hollow body 20 having a vehicle attachment portion 24 for attaching the body to the underside of a vehicle. A piston 80 is slidably fitted into the interior of the body. The piston is formed of ductile aluminum capable of being machined to a desirable shape and dimensions. The piston is hard anodized and PTFE coated for durable and silent operation. Hydraulic oil passage means 23a, 23b is formed in the body, and a cap 50 with a pair of dual flow-through passages 53 is attached to the top end 30 of the body for permitting the flow of pressurized hydraulic oil into and out of the interior of the body to effect axial movement of the piston. Hydraulic fluid may be transferred through one or more hollow mounting bolts.

Abstract: A support jack for supporting semitrailers including a vertically telescopically displaceable supporting device having an outer sleeve and an inner sleeve. A spindle nut has projections and contact elements for being positively detachably connected to the sleeves. The projections interact with openings of the inner sleeve for fixing the spindle nut in the direction of the longitudinal axis of the support jack. The contact elements interact with an inner side of the outer sleeve for fixing the spindle nut in the direction of rotation about the longitudinal axis. A method of assembling a support jack is also described, in which the spindle nut is connected detachably to the inner sleeve by at least one translatory and one rotary joining movement or at least two translatory joining movements.

Abstract: A semitrailer landing gear, particularly for supporting trailers, including a supporting element, which can be telescopically displaced in the height thereof and which has an outer sleeve and an inner sleeve, the outer sleeve having a fastening flange for placing on a vehicle. The aim of the invention is to develop semitrailer landing gears with a reduced weight as well as with favorable manufacturing costs. To this end, the invention provides that at least one lateral wall of the outer sleeve and/or of the inner sleeve is provided with an angled wall section extending in an axial direction.

Abstract: A motor drive for camper jacks or screw jacks that rapidly operates the screw jack between a retracted position and an extended no load position. A manual operator then operates the screw jack between the extended no load position and an extended loaded position. The motor drive and manual operator share a right angle gear mechanism.

Abstract: An electric actuator motor drives an actuator leg between inner and outer limits of an actuator stroke relative to an actuator base. A controller detects when the actuator leg is at one of the inner and outer stroke limits by monitoring and comparing actuator motor power draw to known actuator motor power draw values associated with the operation of an electric actuator when its leg has reached an actuator leg stroke limit. A position sensor senses changes in the position of a monitored actuator component and provides corresponding signals to the controller. The controller calculates the position of the monitored actuator component relative to the position that the monitored actuator component was in when the actuator leg was in a predetermined home position. The controller recognizes and records the concurrent position of the monitored actuator component as indicating that the actuator leg is in the home position whenever the leg reaches a stroke limit.

Abstract: A wheeled center stand for motorcycles. The center stand incorporates a spine rotatably attached to a frame, and at least one leg rigidly attached to the spine. The frame is attached to a motorcycle frame cross-member. At least one wheel is rotatably mounted to an extreme of a leg opposite the spine. The center stand may be extended and retracted conventionally, using a foot lever mounted to one of the legs. The wheels may be swiveling wheels or non-swiveling wheels. In the preferred embodiment, each non-swiveling wheel was mounted at a 20 degree offset relative to a stand centerline. When extended, a motorcycle to which the wheeled center stand is mounted may be rotated relative to a surface upon which it rests, such as a garage floor, with a minimum of effort. Nut plates are also taught which facilitate the mounting of the stand to a motorcycle frame cross-member.

Abstract: The present invention may be used for leveling a land vehicle. A frame lifting assembly may have a frame cross-member adjustable in length for attachment at each end to each side of a vehicle frame. A folding jack with a force element and a folding leg may be attached to the frame cross-member. The folding leg may have a leg member with a foot attached at a first end to a force rod of the force element. A support arm may be rotatably attached intermediate the first end and the second end of the leg member and may be rotatably attached adjacent a second end of the frame cross-member. A positioning rod may be rotatably attached at the first end of the leg member and rotatably attached to the frame member. The force rod may be movably attached to a fixed element of the force element and the fixed element may be attached to the frame cross-member.

Abstract: The swivel jack assembly is used with trailers to vertically position a trailer tongue for mounting onto a hitch of the towing vehicle. The swivel jack assembly includes a jack-mounting bracket welded to an outer housing of the jack, and a tongue-mounting bracket mounted onto the tongue portion of a trailer. The jack also includes a novel swivel mechanism for pivoting the mechanism in either an upright support position or a horizontal stowed position. A cup-shaped section of the jack-mounting bracket nests within a cup-shaped section of the tongue-mounting bracket. When in the upright position, the jack extends vertically and may be used to raise or lower the tongue and support the trailer. The swivel jack assembly keeps the trailer in a level position when the trailer is disengaged from the towing vehicle. The swivel jack assembly is pivotally mounted onto the trailer tongue such that they can be pivotally repositioned to a stowed position when not in use.