Abstract: A foldable bicycle has a front frame, a main frame, a rear frame and a driving device. The front frame has a front fork device with a front fork and a front wheel rotatably connected to the front fork. The main frame is connected to the front frame and has a front arm, a connecting device and a rear arm. The front arm has a front pivot rod. The connecting device is pivotally connected to the front arm. The rear arm is pivotally connected to the connecting device and has a rear pivot rod. The rear frame is rotatably connected to the main frame and has a rear fork device with a rear fork and a rear wheel rotatably connected to the rear fork. The driving device is mounted on the main frame to drive the rear wheel to rotate relative to the main frame and the front frame.

Abstract: A foldable seat mounting rack of a foldable motorized vehicle includes a pair of symmetric foldable seat mounting support. Each symmetric foldable seat mounting supports comprises: an upper mounting base, a lower mounting base, a pinion, a locking lever, a main connecting plate, a first and a second auxiliary connecting plates. The main connecting plate is pivoted on both upper and lower mounting bases. The pinion is pivoted at a middle portion on an inner side of the main connecting plate. Side surfaces at one end of the both auxiliary connecting plates are formed with racks engaging with the pinion. The first auxiliary connecting plate is pivoted on the lower mounting base and the second auxiliary connecting plate is pivoted on the upper mounting base. One end of the locking lever is pivoted on the upper end of the main connecting plate, and the other end presses against the pinion.

Abstract: A balance bike includes a frame, front and rear wheels, a seat, a joining structure, a front fork, and a steering handle. The joining structure is pivotally joined to the frame and pivotal between first and second positions. The joining structure includes a joining end and a receiving end. The front and rear wheels are disposed apart from each other, and the balance bike defines a first longitudinal dimension when the joining structure is in the first position. The front and rear wheels are disposed adjacent to each other, and the balance bike defines a second longitudinal dimension when the joining structure is in the second position. The first longitudinal dimension is larger than the second longitudinal dimension.

Abstract: Embodiments of the invention describe a quadrilateral frame to be utilized by a two-wheeled vehicle. The quadrilateral frame may include front and rear vertical assemblies, top and bottom collapsible horizontal assemblies, the horizontal assemblies to collapse vertically. By collapsing the horizontal assemblies of the quadrilateral frame, it is to be understood that the space occupied by the vehicle when it is not in use is significantly reduced.

Abstract: A locking mechanism for a foldable motorized vehicle for locking a main frame body thereof comprises a pulling arm, locking shafts, shaft sleeves, elastic elements, and locking pins. The shaft sleeves are fixedly positioned in parallel below the main frame body and respectively sleeved on the locking shafts. Each of the locking pins is fixed on one end of a corresponding locking shaft and penetrates corresponding locking holes on the main frame body. Each elastic elements is sleeved on the corresponding locking shaft and pressing against the locking shaft and the corresponding shaft sleeve, respectively. The pulling arm comprises a pulling rod pivoted on one end of one locking shaft, and a connecting member with one end pivoted on one end of the other locking shaft, and the other end pivoted on the pulling rod.

Abstract: A handlebar folding mechanism for a foldable motorized vehicle comprising: (a) a mounting base, (b) a first connecting member and a second connecting member, each having a connection portion and a locking portion, (c) a first locking lever and a second locking lever, (d) a steering axial rod and (e) a first steering handlebar and a second steering handlebar, each of the steering handlebar having an inside end and outside end, wherein the connection portions of the connecting members are connected to the inside end of the first steering handlebar, the locking portions of the connecting members are pivoted on the mounting base, the locking levers are retractably mounted in the mounting base to control the rotation of the connecting members.

Abstract: A foldable device is adapted to connect a front fork to a handlebar of a bicycle, and includes a linking member hingedly connected to lower and upper hingeable flanges about first and second hinge axes, respectively. The first and second hinge axes are transverse to each other. The upper and lower hingeable flanges are respectively coupled with the handlebar and the front fork. The handlebar is turned relative to the front fork about the first and second hinge axes to permit a handlebar line of the handlebar to be parallel to a longitudinal direction in which the bicycle extends so as to fold the bicycle and to minimize the entire width of the folded bicycle.

Abstract: An apparatus which is convertible from a portable cargo container to a wheeled vehicle. In particular, the present invention is a backpack or article of luggage that includes a deployable wheeled platform so that the backpack or luggage is convertible to a scooter type vehicle. The present invention is particularly useful for transporting relatively heavy loads along with a human operator, quickly and with minimal effort.

Abstract: The invention relates to a scooter with a folding device and the folding device. The folding device comprises a first rotating part, a second rotating part and a locking part. The second rotating part is pivotally connected with the first rotating part such that the second rotating part is rotatable about a pivot axis relative to the first rotating part. The locking part comprises a locking pin which is movable in the direction of the pivot axis between a locked position and a released position. When the locking pin is in the released position, the second rotating part is rotatable relative to the first rotating part. When the locking pin is in the locked position, the second rotating part is locked and not rotatable relative to the first rotating part. This folding device has compact structure and simple appearance. The scooter is convenient to carry and store.

Abstract: The teachings provided herein are generally directed to compact vehicle drive mechanisms that can be used in the design of a foldable, carry-on vehicle. The compact drive mechanisms presented herein, for example, have contributed to the advent of the compact, carry-on bicycles set-forth in the teachings which include drive-and-steering units and drive-and-chassis units.

Abstract: One embodiment of a tricycle (20) having a spine frame (22), supported by a rear wheel (34) and a pair of steerable front wheels (36), and supporting a recumbent seat (42) pivotably attached at its rear. A pedal boom (44) extends forwardly of the spine (26) and supports a pedal crank assembly (46). The front wheels each support a lateral arm (28) with the front wheel pivotably attached at the distal end and an angular projection (80) attached at the proximal end. A pivot (78) connects each angular projection to the spine, allowing the lateral arms and attached front wheels to fold to a stowed position alongside the spine. Another pivot (84) connects the boom to the spine, allowing the boom fold back to a stowed position against the spine. In the travel position, a clamp arrests the angular projections, and can arrest the boom and seat. The tricycle is collapsible to several levels of compactness. Other embodiments are described and shown.

Abstract: A modular wheelchair comprises a number of different modules that include a chassis module with frame members substantially centered along a center plane through the chassis, so that the chassis is able to lay flat when the modules are dissembled. The chassis is connected to a drive module by a single plug/receiver mechanical coupling that may include opposite end geometries. When the plug is in a seated position within the receiver, first end geometries of the two components mate mechanically to resist radial movement, while the second end geometries mate mechanically to resist both radial movement and rotation about an axis of the coupling. Additionally, axial movement in one direction is resisted, with the coupling oriented to apply gravitational force to resist axial movement in the opposite direction. The same arrangement may be used for a seat module.

Abstract: A foldable bicycle provided with a frame, the frame comprising a first arm having a rear end to which a rear wheel is linked, a fork with handlebar to which a front wheel is linked, a bar connecting a front end of the first arm to the fork and hinged to the first arm and a post supporting a saddle and hinged to the first arm. The first arm, the bar and the post are interconnected by transmission elements for simultaneously rotating about the axes between an operative configuration and a carrying configuration. The transmission elements comprise a first engagement angular sector rotatably coupled with said post via first linkages, and a second engagement angular sector in rotary engagement with the first engagement angular sector and rotatably coupled with the bar via second linkages.

Abstract: The vehicle includes a platform (2) made from two parts, a front part (10) and a rear part (11) that is movable in relation to the front part (10) between a folded position and an unfolded position. A steering column (20) includes a lower part (50) and at least one upper part (51) that can be unfolded and folded telescopically in relation to the lower part (50). A transmission (12) between the front part (10) of the platform and the upper part (51) of the steering column (20), arranged so that unfolding the rear part (11) of the platform causes the upper part (51) of the steering column (20) to unfold and, conversely.

Abstract: A collapsible bicycle (1) has a frame (2) collapsible in its plane. The frame (2) includes a head tube (3) having a collapsible bicycle front side end (10) in which a front wheel fork (12), which receives a front wheel (13), is mounted. A seat stay (5) has an end (38) receiving a seat tube (39). A lever (6) is articulated at a first articulation point (50) at a collapsible bicycle rear side end (37) of the head tube (3) and at a second articulation point (49) at the end (38) of the seat stay (5) receiving the seat tube (39). The lever (6) is arranged to the collapsible bicycle front side in a riding position of the collapsible bicycle (1). A down tube (4) is articulated at a third articulation point (18) at the collapsible bicycle front side end (10) of the head tube (3) and at a fourth articulation point (24) at an end (38a) of the seat stay (5), opposite the end (38) of the seat tube (39).

Abstract: Knee walker assemblies and methods of manufacturing a knee walker assembly are provided herein. A knee walker assembly is disclosed that includes a frame with a handle mounted to the frame. At least one rear wheel is mounted to the frame proximate the rear end thereof. At least one front wheel is mounted to the frame proximate the front end thereof. The knee walker assembly also includes a support platform configured to support a portion of an appendage. A collapsible stanchion arrangement movably mounts the support platform to the frame. The collapsible stanchion arrangement includes a trolley and a first stanchion attached at a first end thereof to the support platform and attached at a second end thereof to the trolley. The trolley is slidably mounted to the frame such that movement of the trolley relative to the frame operates to adjust the vertical height of the support platform.

Abstract: A folding type bicycle capable of allowing the user to conveniently fold the bicycle, and having a minimal volume in a folded state is disclosed. The folding type bicycle includes a frame including a front frame, to which a front wheel and a handle are mounted, a center frame, to which pedals are mounted, and a rear frame, to which a rear wheel is mounted. At least one of the front, center, and rear frames includes a hinge plate bent from one end of the at least one frame. The front, center, and rear frames are pivotally coupled through the hinge plate.

Abstract: A locking mechanism for a foldable motorized vehicle for locking a main frame body thereof comprises a pulling arm, locking shafts, shaft sleeves, elastic elements, and locking pins. The shaft sleeves are fixedly positioned in parallel below the main frame body and respectively sleeved on the locking shafts. Each of the locking pins is fixed on one end of a corresponding locking shaft and penetrates corresponding locking holes on the main frame body. Each elastic elements is sleeved on the corresponding locking shaft and pressing against the locking shaft and the corresponding shaft sleeve, respectively. The pulling arm comprises a pulling rod pivoted on one end of one locking shaft, and a connecting member with one end pivoted on one end of the other locking shaft, and the other end pivoted on the pulling rod.

Abstract: A bicycle includes a front wheel, a wheel axle mounted on the front wheel, a front fork located above the wheel axle, two front fork ends each mounted on the front fork and each connected with the wheel axle, and two adjusting shims each mounted on a respective one of the front fork ends. Each of the front fork ends has a lower end provided with a mounting recess for mounting the wheel axle. Each of the adjusting shims has a lower end provided with an adjusting recess secured on the wheel axle. Thus, the wheel axle is deviated from the front fork by adjustment of the adjusting shims so that the distance between the wheel axle and the front fork can be adjusted, and the front wheel is available for an inclined road and an even road.

Abstract: A tool-less coupling of a child vehicle having a front frame and a rear frame includes a post coupled to one of the front or rear frames; a locking insert having at least one flexible table coupled to the post, and a head tube coupled to the other of the front or rear frame, wherein an opening in a first end of the head tube is sized to cause inward flexing of the flexible tab as the post is inserted through the head tube, and the flexible tab flexes back outwardly after passing through the opening in the head tube so that a portion of the flexible tab is adjacent an end surface of the head tube such that the flexible tab cannot move back through the opening. Accordingly, the removal of the post from the head tube is prohibited and the front and rear frames are coupled together. A method for a tool-less assembly of a child vehicle is also disclosed.

Abstract: A foldable bicycle with a large wheel and a small wheel contains an upper rod including one end connected with a side of a supporting post and another end coupled with a first tubular member, the first tubular member including a through hole; an axial shaft inserted into the through hole of the first tubular member of the upper rod and rotating in the through hole; the axial shaft also inserted into an orifice of a second tubular member of a lower rod and rotating in the orifice; wherein the axial shaft includes a bracket extending downward therefrom; the small wheel is axially disposed on a distal end of the bracket, and the large wheel is axially disposed on a distal end of a rear support; when the axial shaft rotates 180 degrees rearward, the small wheel is moved to be close to the large wheel.

Abstract: A height adjustable seatpost assembly is provided with first and second tubes that are telescopically arranged to change an overall length of the height adjustable seatpost assembly using first and second ratchet arrangements. The first ratchet arrangement includes a set of first ratchet teeth having a first pitch and a first stop pawl member being movably coupled with respect to the first ratchet teeth between a first lock position and a first free position. The second ratchet arrangement includes a set of second ratchet teeth having a second pitch that is smaller than the first pitch and a second stop pawl member being movably coupled with respect to the second ratchet teeth between a second lock position and a second free position. The stop pawl members engage the ratchet teeth in the lock positions to prevent expansion of the first and second tubes.

Abstract: An energy efficient tricycle has a frame, fork and handlebars connected to hold a front wheel and two rear wheels. A power and transmission assembly means is mounted on the frame to provide power to both rear wheels. A pair of pedals are independently operable and used to provide the torque needed to propel the tricycle. A motorized embodiment is also provided to provide additional power when needed or to completely motorize the tricycle. The pedals are mounted so that they travel in a vertical path. The handlebars, front wheel and both rear wheels are foldable to allow the tricycle to fit within a vehicle. The tricycle has a very low center of gravity. A seat is provided in one embodiment to allow a user to sit and operate using a motor.

Abstract: A foldable bicycle comprises a frame having a rear portion supporting a rear wheel about a rear axis of rotation, a front portion supporting a front wheel about a front axis of rotation and a hinge system. The hinge system comprises a first part arranged on the rear portion and provided with a first plane surface, and a second part arranged on the front portion and provided with a second plane surface. Inside the first and second parts an actuator mechanism is arranged for actuating a stud that locks or unlocks said parts. The first plane surface and the second plane surface are disposed in a plane that is slightly inclined relative to a horizontal plane, said inclined plane being configured to facilitate pivoting of the front portion relative to the rear portion towards a folded position, in which the rear and front axes of rotation are in alignment.

Abstract: The vehicle has a single steered front wheel (1) mounted on a main frame (5) and two rear wheels (2, 3) mounted on a left (6) and right (7) frames. The left and right frames are connected to the main frame pivotally, which permits the vehicle to be folded into a compact position. The folded vehicle can stand up-right and can be moved to a storage place on two rear (2, 3) and two caster (145) wheels. For carrying inside a car the cycle also can be disassembled to four parts. The seat (9) has a two-point spring suspension with the axis higher than the center of gravity of the seated driver. It allows the seat with the driver to stay in a vertical position while driving on a lateral slope or to lean right and left as the vehicle is making a turn. The vehicle has a leg-operated back pedaling brake mechanism (15) and a car-style steering mechanism with a high-ratio cable reducer (12).

Abstract: Knee walker assemblies and methods of manufacturing a knee walker assembly are provided herein. One concept of the present disclosure is directed to a knee walker assembly that includes a frame, a support platform and a handle mounted to the frame, at least one rear wheel mounted proximate the rear end of the frame, and at least two front wheels swivel mounted proximate the front end of the frame. A locking mechanism is operatively engaged with the at least two front wheels. The locking mechanism is configured to substantially simultaneously lock both of the at least two front wheels in a rigid-type mounting configuration.

Abstract: Each side of an adjustable handlebar assembly has a hand grip assembly receiving portion having one of an elongated hollow member and an elongated member, a hand grip assembly and at least one releasable fastener. The hand grip assembly has the other of the elongated hollow member and the elongated member, and a hand grip disposed on the other of the elongated hollow member and the elongated member. The at least one releasable fastener is disposed on one of the elongated hollow member and the elongated member. The elongated member is received coaxially in the elongated hollow member. The hand grip is axially movable and pivotable relative to the hand grip assembly receiving portion. The at least one releasable fastener is operative to selectively and releasably fix the elongated member relative to the elongated hollow member.

Abstract: A trolley-like folding bicycle that mainly includes a bicycle frame, a folding device, a transmission gear, a draw bar, and a draw wheel set is disclosed. With the operation of the folding device, the present invention has a usage state and a folded state. When the present invention is in the folded state, the user can draw the trolley-like folding bicycle by simply turning the folded bicycle body upright such that the draw wheel set contacts the ground and then pulling the draw bar. At this stage, an axis formed with the draw bar is substantially perpendicular to a draw rotation axis formed with small wheels of the draw wheel set. The user can move the trolley-like folding bicycle by simply pulling the draw bar, as easily as drawing a luggage case.

Abstract: An adjustable seat post is composed of a seat post, a slide member, a locker assembly, and a clamp assembly. The seat post includes a tube and a guide base mounted to a top end of the tube. The slide member is linearly movably mounted on the guide base and includes a through hole running through a top side thereof and a bottom side thereof. The locker assembly includes a locking piece and a linking bar. The locking piece is rotatably mounted in the guide base. The linking bar has a first end movably connected with the locking piece, and a second end pivoted to the slide member and located in the through hole. The clamp assembly is mounted onto the slide member for holding a saddle. In this way, the slide member can be firmly mounted to the guide base.

Abstract: A bicycle seat adjustable device includes an outer tube with an inner tube movably inserted therein and a piston is connected to the inner tube. A valve control device includes an outer path tube in the inner tube, and a lower end of the outer path tube is connected to the piston and a top end of the outer path tube extends toward the inner tube. A movable piston is movably mounted to the outer path tube. An outer oil room and an inner air room are defined between the inner tube and the outer path tube. A valve unit is connected to the inner path tube to form an inner oil room and a path which communicates with the outer oil room and the inner oil room, and controlled by the valve unit. The inner tube and the inner path tube increases the travel distance of the hydraulic oil.

Abstract: A foldable bicycle includes a frame, gears and two wheels. The frame includes a front vertical tubular portion, a front horizontal tubular portion, a hinge, a rear horizontal tubular portion and a seat-supporting tubular portion. A lopsided portion is disposed above the front fork. One piece of the hinge is welded to the rear end of the front horizontal tubular portion, and another piece is welded to the front end of the rear horizontal tubular portion. The seat-supporting tubular portion is positioned by a positioning rod. Therefore, the foldable bicycle of the present invention may be folded up into a smallest volume and then may be stored away easily through its positioning unit, hinge and positioning rod. Also, its two small wheels fitted to the rear rack enable the bicycle in a folded condition to be moved around easily.

Abstract: A scooter has a platform on which a rider can stand, a front wheel attached to a steering system including an upstanding handle bar and rear wheel which is driven. The scooter can be folded at a hinge line across the platform so to allow it to collapse. A case for the scooter includes a front part and a rear part covering the front and rear wheels with the parts brought together by the collapsing of the platform. This folding action also uses a pivot link to move the front and rear wheels pivoted within the respective case parts to a folded position. The steering includes a headstock with the steering bar connected to the front fork by a drive coupling which converts the rotation of the steering bar about the generally vertical axis to the rotation of the fork about an inclined axis.

Abstract: A cycle frame includes a back frame section and a front frame section. The back frame section has a bottom, substantially horizontal member and a top, substantially horizontal member. The back frame section also has a rear, substantially vertical member that is affixed at bottom and top ends to respective rear ends of the bottom and top members. The front frame section has a top frame member having a rear end that is releasably affixable to a front end of the back frame top member. A front frame member has a bottom end that is releasably affixable to a front end of the bottom member. A frame neck is affixed in bridging relation to the top and the front frame members. Thus the present invention achieves the front frame section's being interchangeable with another front frame section.

Abstract: A bicycle frame includes a front section and a rear section. The front section includes a front frame portion having a front coupling configured to receive a front wheel support member and to allow rotation between the front coupling and the front wheel support member, the front frame portion defining a central vertical plane of the frame. The rear section includes a drive link case having an upper tube, a lower tube, a rear hub housing, and a front sprocket housing all integrally arranged with each other to form a rigid drive link case having an opening disposed between the upper and lower tubes, the drive link case being connected to the front frame portion via the front sprocket housing. The drive link case is disposed eccentric to the central vertical plane and is cantilevered rearward from the front sprocket housing. The front frame portion extends forward from the front sprocket housing.

Abstract: A folding apparatus for a bicycle frame includes a bicycle frame and at least one engaging device assembled on the bicycle frame. The bicycle frame includes at least one first tube and at least one second tube. Each of the at least one engaging device includes a stationary sleeve disposed on the second tube and has a series of second tooth formed thereon. A rotary sleeve is fixed to the first tube and rotatably mounted on the second tube. The rotary sleeve has a series of first tooth formed thereon for correspondingly engaging with the stationary sleeve. A locking device is movably mounted on the second tube for securely retaining the rotary sleeve firmly engaging with the stationary sleeve. When the locking device is released, the rotary sleeve and the first tube rotate relative to the second tube, and the bicycle frame is folded.

Abstract: An energy efficient tricycle has a frame, fork and handlebars connected to hold a front wheel and two rear wheels. A power and transmission assembly means is mounted on the frame to provide power to both rear wheels. A pair of pedals are independently operable and used to provide the torque needed to propel the tricycle. A motorized embodiment is also provided to provide additional power when needed or to completely motorize the tricycle. The pedals are mounted so that they travel in a vertical path. The handlebars, front wheel and both rear wheels are foldable to allow the tricycle to fit within a vehicle. The tricycle has a very low center of gravity. A seat is provided in one embodiment to allow a user to sit and operate using a motor.

Abstract: The frame (10) comprises a seat tube (11) to the top end (11a) of which a saddle (12) is to be connected, and a front structure (14) and a rear structure (15) which are identical and have, in side view, a generally V-shaped configuration with the ends (14a, 14b; 15a, 15b) connected to the seat tube (11) and the respective vertices (14c, 15c) facing in opposite directions relative to the seat tube (11).

Abstract: A foldable land vehicle employs two pivots: a first to rotate the rear-wheel assembly and shorten the distance between the chain-ring axle and the rear-wheel axle; and a second to rotate the chain-ring assembly and the rear-wheel assembly to align them with the main beam. The rear-wheel assembly detaches from the frame to enable rotation about the rear-wheel pivot. The rear-wheel pivot connects the chain-ring assembly to the rear-wheel assembly. The chain-ring pivot is preferably located on the main beam. Each pivot may be tilted from perpendicular to the approximate central vertical plane of the foldable land vehicle in order place the rear wheel and chain ring in a more compact state adjacent to the main beam.

Abstract: A foldable steering column of vehicle including a steering member with a steering fork. The foldable steering column includes a base coupleable to the steering fork; a steering tube pivotally coupled to the base between at least a first position aligned with the base and second position not aligned with the base; and a sleeve operably associated with the base and the steering tube for positioning between a first position where the steering tube is secured to and aligned with the base and a second position where the steering tube is free to pivot relative to the base.

Abstract: Cycling apparatus (10) including at least one front wheel (12) and at least one rear wheel (14) rotatably mounted on axles on a frame (18), a riding sea (20) attached to the frame (18), a drive mechanism (24) coupled to at least one of the wheels for driving the cycling apparatus, at least one handlebar post (26) attached to a portion of the frame (18), and a carrier member (28) attachable to the frame (18) for carrying at least one of a child and an object therein and movable between first and second attachment orientations, wherein in the first attachment orientation the cycling apparatus is in a rider orientation drivable by a rider sitting on the seat, and wherein in the second attachment orientation the cycling apparatus is in a stroller orientation wherein the at least one handlebar post (26) is arranged with respect to the carrier member (28) to form a pushable stroller, wherein in the stroller orientation there are two rear wheels (14).

Abstract: A modulized bicycle frame includes at least two frame body members each sidelong symmetric to each other and having a head connecting portion, a seat connecting portion and a bottom-bracket connecting portion, and a plurality of fastening members for combining the frame body members to form the bicycle frame. The frame body members are easy to assemble and disassemble so as to facilitate replacement and modification of the modulized bicycle frame. Besides, the frame body members are suitable for mass manufacture, thereby saving manufacturing costs.

Abstract: A convertible cycling-stroller apparatus is provided. The convertible cycling-stroller apparatus includes a two-part frame; at least one wheel each rotably mounted on the at least one axle on the first frame; at least one wheel each rotably mounted on the at least one axle on the second frame; a riding seat; a drive mechanism; at least one handlebar post attached to the first frame; and a carrier attachable to the first frame.

Abstract: A portable jogging tricycle includes a main frame, a handle base, a rear wheel support frame connected to opposite sides of the handle base, two front wheel support frames and two foldable frames attached between the handle base and the front wheel support frame. The foldable frame includes a plurality of scissor lifts and is used for folding the two front wheel support frames close to the handle base. The main frame includes a plurality of pivoted arms for folding the main frame together to fold in the handle base and the rear wheel support frame.

Abstract: The present invention relates to a transmission system for a two-wheeled cycle of the type comprising at least one sprocket (1) attached to the rear wheel hub (2) and rotatably mounted around an axis (x); at least one chainring (3) secured to the frame of the cycle and rotatably mounted around a second axis (y) parallel to the axis (x); a crankset composed of two pedals (7, 8) rotatable around a third axis (z) parallel to the axes (x, y) and located inside the rear wheel; and a main transmission element (6) drivable by actuating the crankset and passing through said sprocket (1) and also passing through, or controlled by, said chainring (3).

Abstract: A bicycle seat height and alignment device has a first collar for affixing on the top of a bicycle seat tube of a bicycle frame and a second collar for affixing on a bicycle seat post to which a bicycle seat is affixed. The collars each have a complementary circumferentially extending abutting face. The faces are abuttable in only one possible orientation so as to align a bicycle seat affixed to the seat post with the bicycle frame when the seat post is located on the seat tube such that the collars are contiguous.

Abstract: A system and method for a motorcycle to automatically variably adjust the wheelbase length including a rear swing arm having a length and a rear wheel attached thereto, a prime mover that generates a motive force for selectably extending or retracting the length of the swing arm to extend or retract the rear wheel, and means for lengthening or retracting a motorcycle driveline providing power to the rear wheels.

Abstract: A fixing device for an extension tube of an exercise includes an outer tube and an inner tube received in the outer tube, wherein the extension tube extends through the inner tube. A quick release device laterally mounted to an outer periphery of the outer tube. The quick release device extends through the outer tube and the inner tube to quickly fixing/releasing the extension tube when adjusting the stretching distance of the extension tube.

Abstract: A foldable frame includes two tubes, a rectangular tube and two base parts. The two tubes are pivotably or fixedly connected to the base parts. Two ends of the rectangular tube are connected to two respective extension portions of the two base parts by two pins so that the two tubes are pivotable about the two pins. The frame can also be structured as one tube directly connected to the rectangular tube and the other tube is pivotably connected to the base part. The extension of the base part is pivotably connected of the rectangular tube by a pin to form single-point folding feature. An outer tube is rotatably movable between one of the tubes and the rectangular tube, the outer tube hides the rectangular tube when the two tubes are arranged linearly.

Abstract: An electrically-extendible bicycle includes two shaft tubes, which are arranged symmetrically on opposite sides of a head tube that is set atop a front fork. The two shaft tubes extend through a guide sleeve. The shaft tubes have bottom surfaces on which racks are respectively formed. A motor is set on a rear fork of the bicycle and is coupled to a transmission gear train, which mates the racks on the bottom surfaces of the shaft tubes. After the operation of the motor is activated, the transmission gear train selectively drives forward and backward movement of the shaft tubes so as to extend and retract the bicycle.

Abstract: A powered vehicle has a rear frame assembly and a front frame assembly that are pivotally attached to one another, and can be pivoted from a normal fully-extended operating position to a folded position in which the frame assemblies are positioned substantially adjacent to one another, effectively reducing overall vehicle length to about half. One or more latch members lock the front and rear frame assemblies in the fully-extended, normal operating position, and they may be used to lock the frame assemblies in the folded position. The seat support structure may be integrated with the front and rear frame assemblies such that pivoting the frame assemblies toward the folded position collapses the seat support. The steering tiller may also be collapsible toward the front frame assembly. The rear wheels may be mounted on a transaxle that is pivotally mounted on the rear frame assembly. An extendable handle may be provided to assist in the folding operation and to tow the collapsed vehicle on its anti-tip rollers.