Abstract: Vehicle cab suspension control systems are disclosed herein. In some embodiments, the cab suspension control systems can include front cab-to-frame mounts that include controllable elastomer-based isolators that can provide real time variable damping to improve ride quality and/or road holding and reduce cab roll in response to, for example, input from one or more cab and/or frame mounted accelerometers, position sensors, etc. Embodiments of the control systems described herein can utilize a single vehicle controller (e.g., an ECU) to control all of the cab suspension components (e.g., semi-active damping technologies, air spring technologies, etc.) employed on a vehicle to provide a single suspension control solution that can provide improved ride performance, road holding, etc.

Abstract: Lift axle systems for use with trucks and other heavy duty vehicles are described herein. In some embodiments, lift axle systems configured in accordance with the present technology include upper and lower control arms on each side of the vehicle that operably couple an axle to a support system attached to the vehicle chassis. The upper control arm has a first end portion pivotally attached to a support system bracket at an upper bracket location, and a second end portion pivotally attached to the axle at an upper axle location. The lower control arm has a first end portion pivotally attached to the support system bracket at a lower bracket location, and a second end portion pivotally attached to the axle at a lower axle location.

Abstract: This invention relates to a retractable aerodynamic air drag reducing apparatus for reducing the air drag of a vehicle, the retractable aerodynamic air drag reducing apparatus being adapted to move between an expanded configuration and a retracted configuration on a basis of a signal from the vehicle.

Abstract: The present invention relates to crawler vehicles and more particular to track chain suspension mechanisms, which provide for a smooth and levelled operation of the vehicle. The track chain suspension mechanism of the present invention is characterized in having a first and a second track frame, the first frame being suspended to the vehicle by means of a suspension shaft pivotally and slidable mounted to a suspension frame, the second track frame pivotally connected to the vehicle by means of a drive shaft mounted to a drive frame and wherein said first and second track frame pivotally connected to one another by means of a pivot shaft. In its application for concrete path laying machines the track chain suspension mechanism is further characterized in comprising only one idler at the front of the first track frame.

Abstract: A magnetic frame mechanism including an outer frame, first drop center wheels, first brackets, a permanent magnet block. The outer frame includes a face plate, a first side plate, and a second side plate. The first side plate and the second side plate are vertically fixed on two ends of the face plate, respectively. The permanent magnet block is sandwiched between the first side plate and the second side plate. The first side plate and the second side plate include guide structures, and the guide structures include first guide rails. The first drop center wheels are fixed on the inner side of the face plate via the first brackets, respectively. The platform mechanism includes a platform plate, four magnetic travelling wheels, four second brackets, a second guide rail disposed on the surface of the platform plate, and a tension spring.

Abstract: A vehicle for a standing rider has a single surface-engaging wheel; a pair of foot supports, one on each side of the wheel, for supporting a standing rider astride the wheel in a position facing forward; a frame that mounts the wheel and forms a forward riser extending up and forward from the wheel to a position to be grasped by a rider standing on the foot supports to enable the rider to achieve balance and stability while standing and riding. A rearward riser extends up and rearward of the wheel to a position to be grasped by a pusher to enable the pusher to advance, balance and guide the vehicle.

Abstract: An all-terrain vehicle has an air ventilation system positioned adjacent a rearmost point of the front ground engaging members and directing air rearwardly through an engine compartment, wherein the air ventilation system includes at least one air scoop adjacent a front of the vehicle for directing the air. In addition, an ATV has a rear rack having an integral storage bin, where the storage bin is one piece with the rear rack. The storage bin is sealed.

Abstract: The present disclosure provides systems, methods, and devices for operating a vehicle, such as a self-balancing vehicle, using a steering member and/or a braking member. A resistance to movement of the steering member may be controllable based upon an operating state or change thereof of the vehicle. The braking member may control a resistance to motion of at least one of at least two wheels of the vehicle based upon an operating state or change thereof of the vehicle.

Abstract: A foldable vehicle includes a front wheel frame having a front wheel pivotably connected thereto, the front wheel frame having a front circular opening for receiving the front wheel. The vehicle also has a rear wheel frame having a rear wheel pivotably connected thereto, the rear wheel frame having a rear circular opening for receiving the rear wheel. A pivot joint connects the front wheel frame and the rear wheel frame, with the front wheel frame and the rear wheel frame being pivotable against each other via the pivot joint. A front vertical support extends from the front wheel frame and has a handlebar assembly pivotably secured to the front vertical support, and a rear vertical support extends from the rear wheel frame and has a seat assembly removably secured to the rear vertical support.

Abstract: A bottom bracket for a frame of a bicycle and the frame thereof are disclosed. The frame includes a head tube, a connection member, and two chain stays; one end of the connection member is connected to the head tube; the bottom bracket is adapted to be connected to another end of the connection member and the two chain stays; in a forward direction of the bicycle, the head tube is located at a front side of the bottom bracket, while the two chain stays are located in a rear side of the bottom bracket; the bottom bracket is characterized in that: the bottom bracket comprises at least one joint hole, adapted to receive a bottleneck of at least one compressed air bottle to secure the compressed air bottle to the frame; the secured at least one compressed air bottle is located at the rear side of the bottom bracket.

Abstract: A stem for a two-wheeled vehicle, including a first end and a second end, wherein the first end is provided with a mounting section which is suitable and configured to be fastened to at least one fork column. Furthermore, a holding device for a handlebar device is disposed between the first end and the second end. A stem length is provided between the mounting section and the holding device for the handlebar device. Moreover, an adjustment section with an adjustment member is provided between the first end and the second end wherein the holding device for the handlebar device is provided in portions by the adjustment member. Depending on the arrangement of the adjustment member in the adjustment section, two different stem lengths can thus be set.

Abstract: A bicycle having a wheel height adjustment structure according to an exemplary embodiment of the present invention includes: a bicycle frame; a hanger where a dropout is formed and rotatably coupled to one side of the frame with respect to a hinge; and an adjusting portion that adjusts a height of the wheel that is engaged to the dropout by rotating the hanger at a predetermined angle.

Abstract: An ergonomic motorcycle, rear-brake adaptor unit operative to provide constant and immediate accessibility to a rider whose foot is resting on a foot peg when riding in any of variety of riding postures that typically impede immediate access to the rear-brake pedal.

Abstract: A dual powered propulsion system for use with a human powered vehicle is provided. The system includes a connecting rod with a front end operatively coupled to yoke-connected forearm bars. The system also includes a splitter coupled to a rear end of the connecting rod, wherein the splitter is coupled to a first rack and a second rack that operate with a first and second pinion gear to turn a crank axle. This system supplies rotational power to the crank axle in a single rotational direction as the connecting rod is oscillated up and down and back and forth. Even though a solid connecting rod is used to transfer power from the oscillating forearm bars to the crank axle, the vehicle is steerable to the right or left as a result of the use of a carriage, on rollers, and a turning track operatively connected to the forearm bars.

Abstract: A pedal operated vehicle includes a frame and a drive wheel rotatably coupled to the frame. In addition, the vehicle includes a pedal assembly coupled to the frame and including a pedal sprocket. Further, the vehicle includes a transmission mounted to the frame. The transmission includes an input sprocket mounted to a rotatable first shaft and an output sprocket mounted to a rotatable second shaft. A first chain is disposed about the pedal sprocket and the input sprocket. The output sprocket is configured to drive the rotation of the drive wheel. Moreover, the transmission includes a first plurality of sprockets coupled to the rotatable first shaft and a second plurality of sprockets coupled to the rotatable second shaft. A second chain disposed about one sprocket of the first plurality of sprockets and one sprocket of the second plurality of sprockets.

Abstract: A chainring installation structure includes a crank, a spindle, and a swing assembly. The spindle includes a first rotational axis, and one end of the spindle is connected to the crank. The crank drives the spindle to cause the spindle to rotate about the first rotational axis. The swing assembly is disposed at one end of the spindle adjacent to the crank without contacting the crank. The swing assembly can shift axially relative to the spindle. The swing assembly includes a second rotational axis that crosses the first rotational axis, in which the swing assembly can rotate about the second rotational axis.

Abstract: Embodiments relate to a pedal system having a pedal coupled to a main drive shaft having a locked mode where the pedal does not rotate relative to the main drive shaft and a released mode where the pedal can rotate relative to the main drive shaft. In the locked mode, rotation of the pedal relative to the main drive shaft is prevented by a plunger that engages the main drive shaft. In the released mode, rotation of the pedal relative to the main drive shaft is enabled by having the plunger disengage from the main drive shaft. The pedal system is switchable between the locked and released modes. When a user's foot or footwear is engaging the pedal, the pedal is placed in the released mode, and when the user's foot or footwear is disengaged from the pedal, the pedal is placed in the locked mode.

Abstract: A transportation device, in particular a foot scooter, for the locomotion of a person, the transportation device including a footboard having a deck for accommodating the person, the transportation device being propellable by a push-off by the person, the transportation device including a motor for supporting the propulsion of the transportation device, the transportation device including a detection device for detecting a push-off state and a control device for controlling the support of the propulsion as a function of the detected push-off state, the detection device including a sensing device (10) for detecting a force exerted by a person on the deck.

Abstract: A drive for a wheeled vehicle having a driven wheel is described. The driven wheel is driven by a gear. The drive includes a support mounted on an axle of the driven wheel and attached to a frame element of the vehicle. A motor is located at the driven wheel. This drive motor is mounted on the support. A second drive gear connected to the drive motor. The second drive gear is also mounted on the support. The second drive gear engages the gear fixed to the driven wheel.

Abstract: A velocipede includes a pedal crank for pedals to allow an operator to power the velocipede, and a transmission hub or component that is coupled to the pedal crank by a first chain or belt. The transmission component is located rearward of the pedal crank in the frame of the velocipede, such as under a seat position, and is further connected to a rear wheel at an output of the transmission component by a second chain or belt. The transmission has an output that is coupled to a rear wheel assembly. In some embodiments the rear wheel assembly can be mounted in a swingarm that pivots about a transverse axis defined by the output of the transmission. In some embodiments the rear wheel assembly can include an electric motor to drive a rear wheel.

Abstract: A snowmobile has a frame, a ski, a rear suspension assembly, an endless track supported by the rear suspension assembly, a motor supported by the frame, and a continuously variable transmission (CVT) operatively connecting the motor to the endless track. The motor has a shaft rotatable about a shaft rotation axis. The CVT has a primary pulley, a secondary pulley, and a transmission belt. The primary pulley is rotatable about a primary pulley rotation axis extending parallel to the shaft rotation axis of the shaft of the motor. The primary pulley is operatively connected to and driven by the shaft of the motor by one of a chain and a belt. The secondary pulley is operatively connected to and driven by the primary pulley. The secondary pulley is operatively connected to the endless track. The transmission belt connects the primary pulley to the secondary pulley.

Abstract: An internal transmission is basically arranged with a hub shaft which is attachable to a bicycle frame, a first shaft which is separate from the hub shaft and which is non-rotatable around the hub shaft, and a second shaft which is separate from the hub shaft and from the first shaft and which is non-rotatable around the hub shaft. The internal transmission has a plurality of first rotating bodies which are coaxially rotatable around the first shaft, and a plurality of second rotating bodies which are coupled to each of the first rotating bodies, and which are coaxially rotatable around the axis of the second shaft. The internal transmission has a clutch mechanism which controls at least one of the rotation state of the first rotating body and the rotation state of the second rotating body, and a hub shell which is rotated around the hub shaft.

Abstract: An automatic bicycle drivetrain shifting apparatus comprising a bicycle drive chain derailleur apparatus powered by a servo gearmotor and controlled through a highly adaptable user interface serving to automatically alternate drive chain position between available bicycle drive sprockets based on user preset and in real time modifiable criteria and additionally making use of critical chain driver apparatus serving to ensure chain motion is always available to satisfy derailleur operation requirements often prevalent during coasting and stopping where the bicycle speed changes while pedaling motion has ceased.

Abstract: A standing support assembly for a boat deck to assist boaters with physical limitations in maneuvering around a bass boat. The standing support assembly includes a rigid, elongated stanchion member that is hingedly attached to one end of a rigid, planar attachment plate. An anchor post extends downwardly from the other end of the attachment plate and allows the standing support assembly to be locked into a base plate on a bass boat. Through its hinged attachment, the stanchion member is able to move between a deployed position in which it is orthogonal to the attachment plate and a storage position in which it is parallel and adjacent to the attachment plate. When in the deployed position, a user can hold the stanchion member for added support while moving around on the boat.

Abstract: A device for connecting a chain or line, such as a portion of a chain or line, to a structure, the device comprising a first portion comprising a first axis, the first portion being configured to connect or be connectable to a structure so as to be movable relative to the structure; a first guide element, the first guide element being arranged on or relative to the first portion to be movable around or about the first axis of the first portion; and a second guide element, the second guide element being configured to align at least a portion of a chain relative to the first guide element.

Abstract: A buoy, comprising a body, an inflatable bladder, a bladder cover, a pressure vessel, a variable-volume, gas-filled chamber, a controller, a compressor, and a ballast. The bladder cover surrounds the inflatable bladder. When the inflatable bladder is deflated, the bladder cover is configured to compress the inflatable bladder so as to conform to an exterior contour of the body. The variable-volume, gas-filled chamber provides passive, variable buoyancy to the buoy. The controller is configured to control a transfer of compressible gas between the inflatable bladder and the first pressure vessel. The compressor is configured to remove gas from the inflatable bladder, compress the removed gas, and introduce the compressed gas to the first pressure vessel for storage. The ballast maintains a substantially vertical orientation of the buoy when the buoy is in water.

Abstract: A seating and storage system for a marine vehicle is provided. The seating and storage system includes a seat and a seatback located at the rear portion of the seat. The seatback has a base portion and a movable cover. The base portion has a storage compartment therein and the movable cover is configured to cover an opening in the base portion. The cover is movable between an open position and a closed position. The seatback has a rear surface and a hinge assembly that movably connects the cover to the base portion. The hinge assembly is configured in such that in a fully open position, the cover is entirely positioned on a seat side of the rear surface of the seat back. The hinge assembly is configured to retain the cover in a fully open position in a manner that does not impinge upon the boat side support structure.

Abstract: A multiple position convertible seat assembly for a boat includes three seat frames pivotally coupled to the boat and to each other to move from a first position as a seat, a second position as a lounge seat with leg support, and a third position forming another seat. In the third position, the seat includes a foldout cushion exposing a work surface.

Abstract: A system for collection of rainwater in the open ocean may include: (a) one or more ocean-going vessels, wherein each ocean-going vessel is configured for collection and storage of rainwater, wherein each ocean-going vessel is configured to drift with surface ocean currents in order to navigate to one or more delivery locations, wherein each delivery location is on or near to a land mass; and (b) one or more delivery stations located at the one or more delivery locations, wherein each delivery station is configured to receive stored rainwater from one or more of the ocean-going vessels.

Abstract: There is provided a folding boat structure for facilitating transportation, the structure comprising: a central structure having a fixed primary hull; outrigging supporting at least one secondary hull structure having a secondary hull to the central structure, wherein: the outrigging is double hinged so as to be user configurable in a deployed configuration and a stowed configuration and wherein: in the deployed configuration, the at least one secondary hull is located laterally adjacent the main hull and downwardly orientated; and in the stowed configuration, the at least one secondary hull is located above the main hull and upwardly orientated.

Abstract: The present invention relates to an offshore wind turbine on a floating support structure (1) comprising in combination: a main floater (1) comprising a part of substantially cylindrical shape, a concrete circular element (2) having a diameter greater than the diameter of the main floater, providing a stationary mass at the base of the floater and a damper, supplementary permanent ballast (4) arranged at the base of the main floater, dynamic ballast boxes (3) included in the main floater and distributed ringwise on the periphery of the floater.

Abstract: A personal watercraft includes a recess formed in a deck and a lid member having a mesh-like appearance and made of elastic members crossing each other, wherein the lid member is removably attached to cover an opening of the recess. The recess is formed in a seat supporting section configured to support a seat for an operator to sit during an operation.

Abstract: A Method and Apparatus for Wake Enlargement System have been disclosed. By using water pick-ups that are mounted on a boat, controlled filling of ballast tanks is possible without the use of pumps.

Abstract: The present invention contributes to vessel navigation safety, by applying conventional navigation technology and using smartphones or other wireless communication terminals to provide a chart according to vessel type. Provided is a server system (3), which: receives, from wireless communication terminals (2) which are carried by users aboard vessels (4), position information of the wireless communication terminals (2) and information of the sizes of the vessels (4); creates, in response to the sizes of the vessels, navigation trajectory information formed from time series position information of the vessels (4); and, with the navigation trajectory information as an input, updates navigable course information for each size of the vessels (4).

Abstract: A regulator first stage for two-stage underwater breathing apparatuses includes a reduction chamber communicating with a high-pressure gas supply through a balance valve, which is influenced by the pressure of the external environment by a balance diaphragm that, by way of a suitable actuator, acts on the valve. The reduction chamber includes one or more medium pressure outlets, having axes parallel to the operating axis of the balance valve. In one configuration, one or more medium pressure outlets are also provided having axes orthogonal to the operating axis of the valve.

Abstract: A system for automated rendezvous, docking, and capture of autonomous underwater vehicles at the conclusion of a mission comprising of comprised of a docking rod having lighted, pulsating (in both frequency and light intensity) series of LED light strips thereon, with the LEDs at a known spacing, and the autonomous underwater vehicle specially designed to detect and capture the docking rod and then be lifted structurally by a spherical end strop about which the vehicle can be pivoted and hoisted up (e.g., onto a ship). The method of recovery allows for very routine and reliable automated recovery of an unmanned underwater asset.

Abstract: Apparatus suitable for use in positioning ceiling or wall panels in predetermined locations. The apparatus includes one or more channel means shaped to receive at least part of a panel in use, said channel means at least partially defined by one or more substantially planar outer walls and at least one inner wall. At least part of the inner wall depends away from the outer wall thereby forming the opening into said channel means through which the ceiling or wall panel is inserted in use.

Abstract: Disclosed is a propeller having at least first and second blade assemblies located one above the other. Each of the blade assemblies has a plurality of blades that extend radially outward from a shaft. The shaft can be coupled to a suitable land, sea or air vehicle (e.g., a ship). The blades of the first blade assembly lie above and alternate out of phase with the blades of the second blade assembly. Each of the blades of the first and second blade assemblies slopes downwardly relative to the shaft such that the leading sides thereof are located lower along the shaft than the opposite trailing sides. The blades of the first blade assembly are aligned with respective ones of the blades of the second blade assembly to establish substantially continuous and long downwardly sloping surface areas capable of maximizing the propulsion force generated by the propeller.

Abstract: A ship propulsion unit includes: an engine including a crankshaft extending in a front-rear direction of a ship; a propeller shaft; a power transmission mechanism configured to couple the crankshaft and the propeller shaft; an upper case; and a lower case accommodating the propeller shaft and connected to the upper case. The power transmission mechanism includes a drive shaft extending from the upper case toward the lower case. The upper case and the engine are fixed to a ship body. A connection portion between the upper case and the lower case is provided with a rotation mechanism configured to rotate the lower case around an axis of the drive shaft.

Abstract: The present invention is realized by apparatus and methods for harvesting, storing, and generating energy by permanently placing a large rigid buoyant platform high in the earth's atmosphere, above clouds, moisture, dust, and wind. Long, strong and light tethers can connect the buoyant structure to the ground which can hold it in position against wind forces. Weights suspended from the buoyant platform with cables are raised and lowered by electric winches to store and release gravitational potential energy. High voltage transmission lines electrically connect the platform to the earth's surface. Electrical energy from the high voltage transmission lines or from photovoltaic arrays on the platform can be stored as gravitational potential energy and subsequently released as electricity from generators driven from the stored gravitational potential energy and used on the platform or transmitted via the high voltage transmission lines.

Abstract: An aeronautical vehicle that rights itself from an inverted state to an upright state has a self-righting frame assembly has a protrusion extending upwardly from a central vertical axis. The protrusion provides an initial instability to begin a self-righting process when the aeronautical vehicle is inverted on a surface. A propulsion system, such as rotor driven by a motor can be mounted in a central void of the self-righting frame assembly and oriented to provide a lifting force. A power supply is mounted in the central void of the self-righting frame assembly and operationally connected to the at least one rotor for rotatably powering the rotor. An electronics assembly is also mounted in the central void of the self-righting frame for receiving remote control commands and is communicatively interconnected to the power supply for remotely controlling the aeronautical vehicle to take off, to fly, and to land on a surface.

Abstract: An aircraft windshield that improves pilot and co-pilot's perception of the outside world. The windshield includes a transparent panel held inside a structure of the aircraft, in which the upper part and the lower part are bridged so that the loads applied to the panel are (at least partially) diverted. Due to part of the loads applied on the panel being diverted, it is possible to provide a larger window panel than currently available that offers better visibility to the outside.

Abstract: The invention relates to aviation equipment. An object of this invention is to develop a new aerodynamic device which can extend the range of aerodynamic devices for aviation, increase the efficiency of the air flow power use, increase the efficiency of the lifting force and improve the efficiency of controlling the wing resultant forces. For this purpose, the aerodynamic device has an aerodynamic wing (2) with a blower (1) of gaseous working fluid (such as air) mounted above the wing (2), in accordance with the invention, the aerodynamic wing (2) has a specific shape it is designed in the form of a double-curved open surface made up by a system of longitudinal grooves (7,8) along the whole wing surface The wing (2) has a convergent segment (4) and a divergent segment (6); between the convergent and the divergent segments there is a smooth transitional segment (5). The wing outlines have end elements (11).

Abstract: An aircraft body and a method of making an aircraft body are provided. In one embodiment, an aircraft body may be molded from a single layer of carbon fiber stock, producing curved sections of single layer molded carbon fiber by molding pliable carbon fiber stock, and heat curing the carbon fiber stock to form a rigid, molded wing section.

Abstract: An aircraft wing comprises a fixed wing, and a wing tip device at the tip thereof. The wing tip device is configurable between (i) a flight configuration for use during flight, and (ii) a ground configuration for use during ground based operations. In the ground configuration with span of the wing is reduced. The wing further comprises a locking mechanism including a locking pin with a longitudinal axis, the locking pin associated with one of the fixed wing and the wing tip device, and a bush associated with the other of the fixed wing and wing tip device, the bush configured to receive the locking pin. The bush is located within a bush housing arranged to allow relative movement of the bush in the direction of the longitudinal axis of the locking pin when the locking pin is received within the bush.

Abstract: A high-lift device comprising an airfoil shaped body having a leading edge and a trailing edge and extending in a spanwise direction configured mainly to generate aerodynamic force; a profile structure arranged to be mounted inside of the airfoil shaped body and extending in spanwise direction of the airfoil shaped body that is configured to provide most of the mechanical strength and stiffness; wherein the airfoil shaped body is provided with an opening extending in spanwise direction at one side through which the profile structure can be fastened and remains accessible inside of the airfoil shaped body.

Abstract: A detachable propeller holder device includes a propeller holder module, a fixed seat and a motor module. Paddles are located the propeller holder module, a buckling component is located on the propeller holder module, the buckling component includes two elastic arms and two hooks, the two elastic arms are symmetrically located at two sides of the propeller holder module, the hooks are respectively located at an end of the two elastic arms and are respectively buckled with two limit portions which are symmetrically located at the fixed seat, so as to fix the propeller holder module to the fixed seat. In the detachable propeller holder device, only the buckling component at the side of the propeller holder module is pinched by fingers to deform inwardly till the hooks are detached from the limit portions of the fixed seat, and then the propeller holder module is pulled upwardly to be removed.

Abstract: A propeller includes a blade free to rotate about a longitudinal axis of the blade. The propeller also includes a mechanical stop positioned to engage mechanically a first portion of the blade and/or a first structure coupled mechanically to the blade when the blade is in a first position. The propeller also includes a magnetic stop positioned to engage magnetically a second portion of the blade and/or a second structure coupled mechanically to the blade when the blade is in a second position. The blade rotates to the first position against the mechanical stop when the propeller is rotated at a first rotational speed and the blade rotates to the second position against the magnetic stop when the propeller is rotated at a second rotational speed in a same direction as when the blade is in the first position.

Abstract: An aircraft landing gear having a shock absorbing strut and a shortening mechanism coupled between a walking beam and a shortening portion of a shock absorber. The shortening mechanism is arranged such that when the walking beam is at a first position due to a first extension state of the retraction actuator the shortening mechanism is in a locked condition in which it inhibits axial movement of the shortening portion within the strut element in the first direction axial direction, and as the retraction actuator changes in extension state from the first extension state towards a second extension state, the retraction actuator moves the walking beam which in turn causes the shortening mechanism to move the shortening portion within the strut element in the first axial direction to shorten the shock absorbing strut.

Abstract: A mechanical lock (10) for a vehicle assembly such as an aircraft landing gear assembly. The lock is either pivotally mounted and substantially mass balanced, or part of an aircraft landing gear assembly (30) and arranged to be mechanically operated from the ground by a mechanical actuation device.