Abstract: A trailer restraining device comprising a portable frame having mounted thereto a tail hook and a king pin receiver that includes at least one of a receiver hydraulic cylinder, a receiver pneumatic cylinder, a receiver electric actuator, and a receive winch.

Abstract: A motorized landing gear for a tractor trailer is located near the manual operation crank of the landing gear. The drive motor is powered by a plug in mechanical communication with a power source and actuated by a switch which may be double-pole/double-throw toggle switch secured adjacent the crank. The motorized landing gear may be provided with a protective all-weather covering.

Abstract: A mobile working machine comprising: a chassis (5); stabilizer legs (10) connected to the chassis; a hydraulic crane (20) carried by the chassis and comprising a crane boom (25) articulately connected to a rotatable column (22) and a lifting cylinder (26) for pivoting this crane boom; and an electronic control device configured to establish a maximum allowed working pressure for the lifting cylinder while taking into account the contribution to the stability of the mobile working machine against tipping from each stabilizer leg (10) that is in an active supporting position. The electronic control device prevents a manoeuvring of a stabilizer leg away from the active supporting position if the working pressure of the lifting cylinder is higher than a threshold value corresponding to the value of the maximum allowed working pressure for the lifting cylinder that would ensue in case the stabilizer leg is made to leave the active supporting position.

Abstract: A level indication system includes a sensor system and a control system. The sensor system is positioned to acquire stability data regarding a stability characteristic of a vehicle at a current location. The stability characteristic includes at least one of a slope, a grade, or a jackknife angle. The control system is configured to determine whether the stability characteristic is within an operational range or a nonoperational range, provide an indication that the vehicle is reconfigurable at the current location into a state whereby the vehicle is operable at the current location in response to determining that the stability characteristic is within the operational range or an indication that the vehicle is not operable at the current location in response to determining that the stability characteristic is within the nonoperational range, and facilitate engaging a stabilization system of the vehicle in response to the stability characteristic being within the operational range.

Abstract: A semi-trailer landing gear assembly can include a set of legs actuable to raise and lower a semi-trailer. Each leg can include a foot abutting the ground and a support abutting the semi-trailer. A rotatable shaft couples to the set of legs where rotation of the rotatable shaft raises and lowers the legs. A crank can operably couple to the rotatable shaft to rotate the rotatable shaft. At least two air drivers operably couple to the crank to rotate the crank in an opposing manner such that at least one air driver is always offset from the direction of rotation to provide continuous torque.

Abstract: The present invention comprises systems and methods for using a specialized styling device, such as a smart hairbrush, smart comb, or accessories, which allow for the collection of data from the devices, and for users to interact over a wireless network. The devices may including a wireless radio frequency modem connected to the internet and a battery to power components, including lights, speakers, cameras, microphones, and sensors. A smart brush may allow for computations through processors, memory, system-on-a-chip, applications, batteries, operating systems, and wired or wireless communication interfaces. It is also possible for the smart brush to connect with other electronic devices, including phones, tablets, and cameras in order to share electrical power and communicate over one or more interfaces. A smart brush may operate as an independent mobile device or within a smart home or other system with multiple computing devices, appliances, and sensors connected together within a network.

Abstract: A height-adjustable support for a vehicle having an outer support pipe, an inner support pipe displaceably supported in the outer support pipe and deployable out of and retractable into the outer support pipe by a drive spindle, a gear unit arranged in the outer support pipe and a drive unit for driving the gear unit for moving the inner support pipe relative to the outer support pipe, wherein the drive unit has a motor arranged outside the cross section of the outer support pipe and a transmission unit, wherein a rotation axis defined by a motor shaft extends outside the outer support pipe and the transmission unit is configured to transmit a torque from the motor shaft to the gear unit, and wherein the transmission unit has a housing and a drive pinion protruding out of the housing and engaging the gear unit.

Abstract: An apparatus providing rotational power to the crank shaft actuating the lowering and raising of legs for supporting a load bearing vehicle. The apparatus includes a means for providing rotational force to the crank shaft comprising a battery powered motorized drill having a drive shaft having a plurality of rotational directions, and a motor housing. Also included is a crank shaft coupler adapted for removable attachment to the crank shaft, comprising an adaptor end having a non-round cross-section, and an attachment end defining a cavity snugly accepting the crank shaft and including a pair of apertures aligned with a transverse bore through the crank shaft through which a lock pin is inserted.

Abstract: A system for retrofitting a trailer having a crank jack with a jack housing and a drop leg includes a hydraulic cylinder including a main cylinder and a ram piston extending outwardly therefrom as the main cylinder is filled with pressurized fluid, a first mounting ear on the hydraulic cylinder and a second mounting ear on the hydraulic cylinder, the first mounting ear opposite the second mounting ear, a cylinder port positioned orthogonally to the first mounting ear and the second mounting ear and positioned between the first mounting ear and the second mounting ear, and a conversion foot sized and shaped to fit within the jack housing and adapted to support the hydraulic cylinder.

Abstract: A vehicle includes a chassis, a body including a cab and a rear assembly, the body coupled to the chassis, a sensor system, and a control system. The sensor system is positioned to acquire stability data regarding a stability characteristic of the vehicle at a current location. The stability characteristic includes at least one of a slope, a grade, and a jackknife angle of the vehicle. The control system is configured to determine whether the stability characteristic is within an operational range or a nonoperational range and provide (i) an indication that the vehicle is reconfigurable at the current location into a state whereby the vehicle is operable at the current location in response to determining that the stability characteristic is within the operational range or (ii) an indication that the vehicle is not operable at the current location in response to determining that the stability characteristic is within the nonoperational range.

Abstract: A semitrailer landing gear controller assembly for automating the extension and retraction of a semitrailer landing gear using an external input of pressurized air. The device includes a primary member designed to receive and rotate a removeable secondary member installed over a turning axle for a semitrailer landing gear, where rotation of the turning axle corresponds to the extension or retraction of a semitrailer landing gear depending on the direction of rotation. The primary member further including a turbine designed to drive rotation of the secondary member with the force of pressurized air obtained from an external input of pressurized air, like the supply line from a semitrailer.

Abstract: A land vehicle is provided having a chassis and having a plurality of corner support units. Each of the corner support units has a support leg which is mounted in a swiveling manner in a bearing shoe, which is rigidly attached to the land vehicle, about a substantially horizontal axis. The length of the support leg is telescopically variable. The support leg comprises at least two pipe sections, which can be displaced relative to each other in the longitudinal direction. A hydraulic cylinder is arranged in the interior of the support leg by means of which the position of the at least two pipe sections relative to each other, and consequently the length of the support leg, can be modified. A separate hydraulic assembly, arranged on the bearing shoe of each affected corner support unit and loading the hydraulic cylinder, is allocated to each corner support unit.

Abstract: A chassis-stabilization system is shown and described that promotes chassis stability over chassis leveling. The chassis-stabilization system equalizes, or more equalizes, the loads on the chassis. This is because uneven loads can cause the chassis (and by extension the entire utility vehicle) to overturn. The chassis-stabilizing system may include a first pressure transducer, a second pressure transducer, a level sensor, and a controller. The controller is configured to receive a first initial reading from the first pressure transducer and a second initial reading from the second pressure transducer; determine an initial pressure profile based at least in part on the first initial reading and the second initial reading; compare the initial pressure profile to a known level profile; and instruct the first actuator to actuate so as to adjust the initial pressure profile to proportionally nearer to the known level profile.

Abstract: Segment of an articulated arm made of composite material, with an elongated shape defining a longitudinal axis, and having a box-like cross section. The segment includes a first end portion, configured for the pivoting of a further segment, a second intermediate portion configured for the pivoting of an actuation member, and a third end portion. The first, second and third portions are made in a single body. The second intermediate portion includes a protruding zone defined by a first side and by a second side converging with respect to each other to define a top. Pivoting elements are provided in the protruding zone for the pivoting of the actuation member between the protruding zone and the first end portion. The first and the second side defining the protruding zone are filleted to substantially rectilinear adjacent tracts of the first and third end portions.

Abstract: A transportation system comprising a vehicle having a first electrically operated component, a second electrically operated component and a wireless controller system. The wireless controller system is used for selectively controlling the operation of the first electrically operated component and the second electrically operated component.

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: An adjustable leg assembly for a loading dock ramp member having an elongate, adjustable housing with incremental slots, a hydraulic system having a hydraulic pump with a cylinder fully contained within the housing and a handle for operation of the hydraulic system. The leg assembly also includes a lock bracket for insertion into the slots to contact the cylinder for even distribution of compression loads. A user pumps the handle to actuate the hydraulic system and thereby adjust the loading dock to the desired height.

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 present invention is an anti-counter rotation device that includes a gear wheel and a latch. The gear wheel is attached to the shaft of a trailer landing gear. The base plate mounts the latch to the trailer landing gear and includes an axle. In a first position, the latch engages the gear and permits rotation of the shaft a first direction (e.g. clockwise (CW)), but prevents rotation of the shaft in the opposite or second direction (i.e. counter clockwise (CCW)). In a second position, the latch operates in an opposite manner; that is, the latch permits rotation in the second direction (i.e. CCW), but prevents rotation in the first direction (i.e. CW). The latch has a width sufficient to accommodate multiple horizontal positions of the crank handle or shaft. One or more spacers on the axle or base plate may be utilized to locate the latch in relation to the gear. A locking pin may be used to insure the spacers and latch remain on the axle.

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 hydraulic leveling system for a vehicle has at least one set of hydraulic jacks that are extended by applying hydraulic pump pressure to an extend side of the jacks and are retracted by relieving hydraulic pressure from the extend side and applying hydraulic pressure to a retract side of the jacks. A pressure sensor has a pressure set point that when it is exceeded the system generates a signal indicating retraction of the jacks. The system operates so that after the pressure sensor set point is exceeded, the system turns off the pump and continues to hold open a valve that applies pressure from the pump to the retract side of the jacks for a period of time and that permits flow to continue from the extend side of the jacks to tank. After such period of time the system once again checks whether the pressure sensor is still activated and if it is not still activated, the system turns the pump back on and continues to retract the jacks.

Abstract: An automated landing gear for an RV with a dual action mechanism that allows an automatic extension tube and attached ground engaging foot to fully extend and retract in telescoping fashion within and out the bottom of an open ended outer tube mounted to an RV. A reversible motor rotates a vertical jack screw which engages a threaded jack nut to extend and retract an open ended inner tube out the bottom of the outer tube. The jack screw extends through a bearing and has a drive nut on its lower end. The drive nut is slidably encased by a drive tube that rotates in conjunction with the jack screw. Male threads on a lower end of the drive tube engage female threads within the automatic extension tube causing the automatic extension tube to extend and retract.

Abstract: The present invention provides an improved drill rig for drilling vertical loop field for geothermal heating/air conditioning units, methods of designing and installing novel vertical loop fields under existing buildings, and novel vertical loop field structures and geothermal heating systems including such loop fields.

Abstract: The invention relates to a hydraulically telescopic support device for a vehicle, in particular for a mobile loading crane, comprising a hydraulically movable piston-cylinder unit for extending and retracting the support device and a hydraulic system comprising a first hydraulic circuit for moving the piston-cylinder unit and a hydraulic force measuring device for determining a supporting force which acts on the support device, wherein the hydraulic force measuring device has a dedicated second hydraulic circuit that is independent from the first hydraulic circuit of the hydraulic system, at least during the determination of the supporting force.

Abstract: A side-step device that includes a driving unit, a pinion gear, a driving gear unit, and a step. The driving unit is mounted on a vehicle body, and the pinion gear is connected to the driving unit and is configured to rotate. The driving gear unit is composed of an outer gear surrounding a portion of the pinion gear and engaging with the pinion gear and a rack gear extending from one end of the outer gear to the vehicle body. The step connects to the opposite side of the vehicle body to the driving gear unit, folds in a normal state, unfolds out from the vehicle body when the pinion gear and the outer gear are interlocked, and extends out from the vehicle body from the unfolded state when the pinion gear and the rack gear interlock.

Abstract: A travel trailer stabilizing system having a right and left compound above-axle strut for bracing the 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: Mobile self-balancing robots for telepresence are provided. The robots comprise a base, a head, and a shaft therebetween. The shaft can be telescoping to allow the head to be extended above the base to about the height of a normal sized person, or can be retracted to make the robot more compact for easier storage and transportation. The head includes components for telepresence such as cameras, a speaker, a microphone, a laser pointer, and a display screen, as well as protection from impacts and falls. The base provides locomotion and balance, and a narrow shaft between the head and base minimizes the robot's weight and reduces the likelihood of collisions with protrusions like table edges.

Abstract: An outrigger including a horizontally disposed two-stage outrigger assembly and a vertically disposed two-stage outrigger assembly extending downwardly from the outer end of the horizontally disposed two-stage outrigger assembly.

Abstract: A supporting foot for vehicles, such as semi-trailers or the like, comprising a foot element with a resting portion for resting on an underlying surface, and a compensating element for receiving a support unit and for compensating a positional offset of the supporting unit with regards to the foot element, wherein the support unit comprises a first supporting element and a second supporting element telescopingly coupled with the first supporting element, the second supporting element is movable between a first and a second position with respect to the first supporting element, and wherein the first supporting element is in engagement with the foot element when the second supporting element is in the second position.

Abstract: A single movement stabilization system attached to the head of a vehicle and housing at least two stabilizer arms (2) arranged in a symmetric manner with respect to the symmetry plane of the head of a vehicle, perpendicular to the ground surface, and wherein each stabilizer arm (2) comprises an extractable element (3) inside a sliding guide element (15), at whose ends an arm (4) with a support foot (5) is bound with hinge (14), as well as at least one hydraulic cylinder (8) to operate the movement of the arm (4), at least one tie rod element (11) to control the movement of the extractable element (3); and wherein the stabilizer arms (2) are bound with each other along the symmetry plane of the vehicle head; and wherein the hydraulic cylinder (8) and rod element (11) are obliquely positioned with respect to the ground surface in order to utilize the maximum leverage; and wherein the hydraulic cylinders (8) and rod elements (11) are controlled by mechanical lock pins (12) and locking pins (6).

Abstract: A first front pair and second rear pair of stabilizer devices associated to the frame of an operating machine, defining, in operative position, a resting base, equal in length to the longitudinal distance between the pairs and equal in width to the transversal distance between the resting feet of each of the latter. Each stabilizer device includes a first and an interconnected second module, one of which is provided with linear elongation means and the other with compass elongation means, the linear and compass elongation means being aimed at being operated in phase relation to define a retracted inactive position, in which the corresponding resting foot is raised from the ground, and a withdrawn operation position, in which said resting foot contacts the ground, at a predetermined distance from the longitudinal midline, such that in this resting base the width distance is at least near to that of the relative length.

Abstract: A parking device for a bicycle includes an inflator and a connecting member. The inflator has a nozzle defined thereon. The connecting member has an inserting part at one end thereof and an assembling part at another end thereof. The inserting part of the connecting member inserted into the nozzle, the assembling part assembled on the bicycle. Under this arrangement, a user connects the inflator to the bicycle via the connecting member to park the bicycle stably; in contrast, when the user wants to ride the bicycle, the connecting member and the inflator are able to be assembled on the bicycle.

Abstract: A support device for work vehicles, including a support post (8, 46) to be provided on the work vehicle, the lift element (11, 15b) thereof being displaceable along a lift axis for supporting on a support area, wherein the support post (8, 46) has an actuating drive for actuating the lift element (11, 15b), and the actuating drive is designed as a planetary roller screw drive (1, 14).

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 height adjustable support for semi-trailers includes a shaft tube body modable on a chassis of a semi-trailer, a slidable support inner tube arranged in the shaft tube 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 beveled gear assemblies. The switching region of the transmission is formed from a lower-gear pinion and a fast-gear pinion each adapted to engage a crank drive, and a low-gear gearwheel and a fast-gear pinion each adapted to engage clutch coupling elements, wherein power is transmitted from the crank drive via the low-gear pinion to the low-gear gearwheel and alternatively from the crank drive via the fast-gear gearwheel to the fast-gear pinion.

Abstract: Exemplary embodiments of an outrigger having a replaceable foot mount may be described. The replaceable foot mount may be removably coupled to a hydraulic cylinder using a variety of fasteners. The replaceable foot mount can be easily removed and replaced when broken to allow outriggers to be quickly repaired and deployed to new work locations.

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 portable power device for powering an existing crankshaft operated semi trailer landing gear is disclosed. The portable power device comprises a motor for rotating a drive shaft with an engaging end. An opening in the drive shaft fits over the engaging end for mating with the existing crankshaft once a hand crank is removed. The portable power device further comprises a plurality of sockets for engaging a lug nut.

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: A leveling system for supporting a drill assembly includes at least one hydraulic actuator and a manifold coupled to the actuator. The hydraulic actuator supports the cab relative to a support surface, and includes a first end coupled to the cab and a second end that is extendable away from the first end. The manifold is coupled to the actuator and includes a directional flow control valve, a regenerative flow valve, and at least one counterbalance valve for controlling the extension of the actuator. The counterbalance valve is in direct fluid communication with the actuator.

Abstract: A system to stabilize a construction vehicle having a frame and a pair of stabilizing legs with ground-engaging shoes at the ends of the legs. The stabilizing legs pivotally connect to the frame on substantially opposing sides, so that the stabilizing legs pivot upwards to a stowed position and pivot downwards to a stabilizing position where the shoe engages the ground. Further, the stabilizing legs telescope between a retracted position and an extended position. The retracted position locates the shoe closer to the vehicle and the extended position locates the shoe further from the vehicle. A pair of hydraulic cylinders connect to the respective stabilizing legs to power the telescopic movement of the stabilizing legs between the retracted position and extended position.

Abstract: A portable automated vent cover includes a drive system, a telescoping tube, a vent cover plate and a collapsible mobile tripod. The drive system preferably includes a drive motor, a gear box, an up-relay and a down-relay. The telescoping tube includes an outer support tube, an inner cover tube and a rack gear. The rack gear is attached to the inner cover tube. The vent cover plate is secured to a top of the inner cover tube. The drive motor drives a pinion gear through the gear box. The gear box is retained on the outer support tube. An up-down switch is used to raise and lower the vent cover plate. Electrical power is controlled by either the up-down switch or a controller and sent to the drive motor through either the up-relay or the down-relay. The collapsible mobile tripod is attached to a bottom of the outer support tube.

Abstract: A support device for use in a walking machine including a frame-like base connected to a chassis, sheath tubes fixed on the frame-like base, extensible arms provided in the sheath tubes, support parts provided on outward ends of the extensible arms and extensible perpendicularly, wherein, the sheath tubes are arranged in double X-form, one pair of sheathe tubes arranged diagonally are parallel and at same height, another pair of the sheath tubes that are arranged diagonally and are also parallel and at a same height are at a different height from the pair of the sheath tubes.

Abstract: Mobile self-balancing robots for telepresence are provided. The robots comprise a base, a head, and a shaft therebetween. The shaft can be telescoping to allow the head to be extended above the base to about the height of a normal sized person, or can be retracted to make the robot more compact for easier storage and transportation. The head includes components for telepresence such as cameras, a speaker, a microphone, a laser pointer, and a display screen, as well as protection from impacts and falls. The base provides locomotion and balance, and a narrow shaft between the head and base minimizes the robot's weight and reduces the likelihood of collisions with protrusions like table edges.

Abstract: Apparatus for propping a device, comprising a platform, a bracket, a carriage and a backstay. The backstay is rotatable relative to the carriage and to the device. The carriage can be moved in a first direction, which can causes a device to move between a stowed position and a deployed position. Apparatus comprising a rotatable assembly and a device movable between stowed and deployed positions, a center of rotation of the device in the deployed position being at or displaced only substantially vertically from a center of gravity of the rotatable assembly. Apparatus comprising a platform mounting portion, a platform structure rotatably mounted thereon, a duct extending through the platform mounting portion and into a space within the platform structure, whereby fluid can be passed through the duct and into the enclosed space while the platform structure is rotating relative to the mounting portion. Methods of propping a device.

Abstract: A height-adjustable support (10) for semi-trailers or similar, comprising a locally fixed external support tube (13), an internal support tube (14), which is fixed to a nut (18) on a spindle (17), the spindle being driven by a change-over gear and a bevel gear assembly. The change-over gear has two gear wheel stages which can be alternately activated, a separate gear stage comprising bevel gear toothing being provided for the distribution of forces after each gear wheel stage.

Abstract: A stand assembly for motorcycles includes a stand unit, a motor, a power transmission mechanism and a switch set. The stand unit includes a first part pivotably connected to the bottom of the frame and a second part is retractably connected to the first part. The power transmission mechanism controls the motor to extend the second part relative to the first part to support the frame of the motorcycle or power bicycle. When the motorcycle or the power bicycle is ridden, the power transmission mechanism controls the motor to retract the second part relative to the first part.

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 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.