Abstract: A stable vehicle that can be folded or disassembled, for example for transportation by another vehicle or for storage, without requiring the use of hand tools. Two front wheels carried by steerable forks, in combination with an underslung main frame, provide a stable configuration. When folded or disassembled, the vehicle is compact, and can be transported using car mounted racks designed for conventional bicycles.

Abstract: A method of mass analysis using a multi-turn time-of-flight mass spectrometer starts with recording plural heterogeneous turn number spectra F1(t), F2(t), . . . , Fq(t) containing plural ion peaks that might be different in number of turns, the spectra being obtained with different ion residence times taken from entry to departure using a multi-correlation function for reconstructing a single turn number spectrum.

Abstract: A theft-proof bicycle comprising a frame structure consisting of three frame parts (1, 2, 3), which are connected so as to form a triangle, where the rod for the front wheel's supporting fork (4) is attached to the triangle's front corner (6), while the rear wheel's supporting fork structures are attached to the frame structure in the areas of the two other corners (7, 8) of the triangle. One of the frame parts (1) forming the triangle's front corner is designed with a holding sleeve for the rod for the front wheel's supporting fork (4). The sleeve is equipped with an extension and an aperture for passing through a locking pin. The second frame part in the area of this corner (6) is designed as a fork, one prong of which is passed on each side of the front wheel fork's rod. The supporting frame (1, 2, 3) is equipped in a corner (7) with a pivot joint in order to permit a relative movement of the supporting parts in the supporting fram's plane, between an operating or cycling position and a locked position.

Abstract: A foldable tricycle includes a center frame, a front frame to which a front wheel is rotatably attached, a rear frame to which two rear wheels are rotatably attached, and a four-bar link including a first bar that is integrated with the front frame, a second bar that is integrated with the center frame, a third bar that is integrated with the rear frame, and a fourth bar. The fourth bar has a shape of plates and covers the other bars while the link operates between an unfolded position and a folded position. Lockers that locks the link in either the unfolded position or the folded position are provided and include a pin, two recesses that receives the pin, and a tension spring that presses the pin into the recesses. A semi-circle guide guides the pin between the two positions and also covers the third bar.

Abstract: A detachable bicycle comprises a front frame section including a joint tube at a rear end of the crossbar, a rear frame section including a sleeve extended forward, obliquely from the bottom bracket for receiving a lower portion of the down tube, and a seat tube extended upward from the bottom bracket of the joint tube wherein the seat tube is substantially perpendicular with respect to the down tube, and a seat post inserted through the joint tube and into the seat tube. The seat post and the seat tube are secured to the joint tube by two quick releases. The down tube is also secured to the sleeve by a quick release.

Abstract: A wheelchair includes a seat frame having two transverse support rods, a foldable sunk-type seat module mounted on the seat frame and located between the two transverse support rods, a backrest frame having two upright support rods, and a foldable sunk-type backrest module mounted on the backrest frame and located between the two upright support rods. Thus, the backrest module may be mounted on and detached from the upright support rods of the backrest frame easily, rapidly and conveniently, and the seat module may be mounted on and detached from the horizontal support rods of the seat frame easily, rapidly and conveniently.

Abstract: A detachable bicycle. The bicycle includes front and rear frame sections and a detachable device having a first assembly device including a lower first sleeve extended upward from a bottom bracket sleeved on a front axle of sprocket wheel. The first sleeve includes a snap member, and an upper second sleeve at a lower end of a seat tube. The second sleeve includes a mating snap member adapted to releasably couple to the snap member. The second assembly device is adjacent to the top of the seat tube. The second assembly device includes a first coupling device formed on the seat tube and a second coupling device formed at a forward end of the seat stay. The first and the second coupling devices are releasably coupled together.

Abstract: A system and method for connecting dissimilar materials is described. In one embodiment, the system may be used to produce a break apart frame that includes a first section and a second part which is disengagably connected to the first part by fastening members. The first part includes a head tube, a top tube and a down tube. The second section includes a bottom bracket, a seat tube, a pair of seat stays and a pair of chain stays. A connection tube extends from the bottom bracket so as to be disengagably connected to the down tube. An end tube is connected to the seat tube and disengagably connected to the seat tube.

Abstract: A folding bicycle comprises a retractable front tube set. Handles at two sides of the top of the front tube set can be folded to the same side. An eccentric rotation device is pivotally provided at the top of the front tube set to drive an internal tube to retract in an outer tube for positioning. A seat tube is pivotally connected with the front tube set. A saddle is provided at the top of the seat tube. A rear tube is pivotally connected with the seat tube. A fastening device is provided between the rear tube and the seat tube to fix the seat tube. The front tube set, the seat tube and the rear tube are connected together by a joint link, which provides the function of a joint to let the front tube set, the seat tube and the rear tube unfold or fold with one another.

Abstract: A foldable bicycle has a frame, a front fork, a front wheel, a stem, a handlebar, a handlebar positioning device, a seat post, a seat, a rear fork, a rear wheel, a drive assembly, a shock absorber and a rear fork positioning device. The handlebar positioning device is mounted between the front fork and the stem so the stem can be folded toward the frame. The rear fork positioning device is mounted between the shock absorber and the rear fork so the rear fork can be folded toward the frame. Accordingly, the bicycle can be folded to reduce the space for storing or transporting the bicycle, and the structure of a foldable bicycle with a shock absorber is simplified.

Abstract: A folding bicycle, wherein a head pipe is pivotally supported on the front end of a main frame so as to freely rotate, a handle shaft for rotatably supporting a front wheel is supported while being inserted into the head pipe, a rear wheel is rotatably supported on the rear end of the main frame, a saddle post having a saddle on the top end is pivotally supported on the rear side of a pivotal-support portion of the head pipe, a stay having the top end detachably fixed on the saddle post is pivotally supported on the front side of the rear wheel of the main frame, a crank gear is rotatably supported between a pivotal-support portion of the saddle post and a pivotal-support portion of the stay, a chain is looped over the crank gear and a small gear provided on the rear wheel, and the stay, the saddle post and the handle shaft can be folded so as to be overlaid one another along the main frame.

Abstract: A detachable bicycle is disclosed. The bicycle comprises a front frame section including a first crossbar, a rear frame section including a second crossbar having second fastening structure for matingly coupling to first fastening structure of the first crossbar when a rear open end of the first crossbar is inserted into the second crossbar, and a fastening mechanism including two ring fasteners. Each ring fastener is operative to fasten front and rear ends of the second crossbar on the open end of the first crossbar. An adverse effect caused by different forces exerted on the frame sections when a drives propels the bicycle by means of pedals can be substantially eliminated by the invention.

Abstract: A mini-tricycle capable of being controlled by legs for determining the direction of the mini-tricycle comprises a front frame and a rear frame. The front frame has a front wheel fork and a pedal fork. The front wheel fork has front wheel spindle. The front wheel spindle is pivotally connected to a front wheel and a follower. The follower is fixedly connected to a front wheel. The front wheel fork is connected to a lower end of the pedal fork. An upper end of the pedal fork is connected with a pedal seat. A pedal shaft is pivotally installed to the pedal seat. The pedal shaft is fixed with a driving means. The driven means serves to connect the driving means and the follower. Thereby, the volume and weight of the tricycle are reduced so that it can be carried easily. Moreover, the tricycle is suitable for children and adults.

Abstract: A bicycle includes a bicycle frame, a wheel set, a treading unit, a handlebar unit, and a seat unit. The bicycle frame has front and rear ends. The wheel set includes front and rear wheels disposed respectively on the front and rear ends of the bicycle frame. The treading unit is mounted on the bicycle frame for transmitting treading power to the wheel set. The handlebar unit is mounted on the bicycle frame and is coupled to the front wheel to permit steering of the front wheel. The handlebar unit is pivotable toward and away from the rear end of the bicycle frame. The seat unit is mounted adjustably on the bicycle frame to permit height adjustment thereof relative to the handlebar unit.

Abstract: A folding bicycle comprises a frame including a front part whereon is mounted pivoting a steering rod having a lower end provided with a first wheel and an upper end provided with a handlebar, a rear part whereon is mounted a second wheel, and a central part whereon are mounted a saddle and a crankset connected to the rear wheel by transmission elements, such that the saddle, the crankset, the steering rod, the front wheel and the rear wheel are substantially contained in a common plane when the bicycle is unfolded. The frame includes elements articulating the front part and the rear part to the central part to reduce the bicycle wheelbase associated with elements for maintaining at least the front wheel and the rear wheel in the plane.

Abstract: A bicycle includes a stem extending downwardly from a handle, and a crank mechanism interconnecting the stem and a head tube. The crank mechanism includes a frame fixed on the head tube, a lever pivoted to a front end of the frame and extending uprightly therefrom, a crank pivoted to the rear end of the frame and extending uprightly therefrom, and a coupler member pivoted to an upper end of the crank and movably connected to an upper end of the lever so as to permit co-movement of the lever, the crank and the coupler member relative to the frame and so as to permit frontward and rearward movement of the handle together with the stem relative to the head tube. A locking unit is selectively and movably connected to two of the frame, the lever, the crank and the coupler member, and is operable between locking and unlocking positions.

Abstract: A bicycle includes front and rear wheels, which are mounted respectively on front and rear ends of a bicycle frame. The bicycle frame has an inclined main tube that extends rearwardly and downwardly from a head tube to a seat tube. A drive sprocket is disposed on the main tube, and is located between the head tube and the seat tube. As such, the total length of the bicycle can be shortened.

Abstract: The present utility discloses a folding device for bicycle body and transom, which comprises bicycle body, a transom jointed to the bicycle body by means of hinge, a tightening lug bolt and a eccentric axle which is inserted into a hole on head of said lug bolt and body of the bicycle successively to attain hinge joint, a groove for receiving and securing the end of the lug bolt is provided on said transom, the end of lug bolt is engaged with a nut which is embedded into said groove in order to joint the transom with the body. The folding device further comprises a torsion spring, one end of which is fixed to the bicycle body and the other end is disposed on the lug bolt. The eccentric axle is connected to a lever. The head of said nut is fastened to the lug bolt by a screw. The device has the advantages of reasonable construction, more convenient and timesaving folding procedure, safe and reliable manipulation and beautiful, tasteful outward appearance, etc.

Abstract: An improved foldable tricycle that extends and transforms to accommodate one, two, or three riders. The tricycle has a front wheel traction with a sprocket secured to the front portion of the front fork with a continuous chain going from the sprocket to the front wheel. The tricycle has a steering assembly which is pivotally secured to the front portion of a frame assembly. A front wheel is rotatably attached to the front fork which is used for the traction, and two rear wheels are rotatably secured to the rear portion of the frame assembly. A releaseable pin that is located below the seat on the frame assembly is released and pulled up to allow the rear wheels to go inwards and towards the front making the tricycle narrow and short in length for storing or transporting. An optional extension frame with a seat on top is used to accommodate a second passenger.

Abstract: A snow skiing device on which a skier may sit and/or stand. The device includes a frame having a front end and a rear end. A ski system which, in one embodiment, includes a steerable front ski attached to the front end and a rear ski attached to the rear end of the frame. The skis can be in linear alignment with one another. The device further includes a platform extending from the front end to the back end of the frame and is positioned above the skis. The platform, in one embodiment, is parallel to the skis.

Abstract: The present invention 10 discloses a new and novel tricycle with adjustable linkage 48, 54 for varying the drive power for either foot or hand power. Furthermore, the linkage 44, 52 can also be used to vary the wheelbase. Moving the front wheel 14 toward the rear wheels 22 provides for a tighter turning radius. Moving the front wheel 14 away from the rear wheels 22 provides for greater stability at high speed. In addition, the linkage 48, 54 provides for the selective placement along a horizontal and/or vertical plane relative to the seat 24 allowing persons of varying size to comfortably position the pedal assembly 16. Additionally, the present invention 10 has a cantilevered seat frame 30 with the seat 24 at one distal end and the other end forming a yoke 32 connected to the front wheel steering pivot column 34 whereby left movement of the seat 24 results in a right turn of the front wheel 14 and a right movement of the seat 24 results in a left turn of the front wheel 14.

Abstract: A folding bicycle, wherein a head pipe is pivotally supported on the front end of a main frame so as to freely rotate, a handle shaft for rotatably supporting a front wheel is supported while being inserted into the head pipe, a rear wheel is rotatably supported on the rear end of the main frame, a saddle post having a saddle on the top end is pivotally supported on the rear side of a pivotal-support portion of the head pipe, a stay having the top end detachably fixed on the saddle post is pivotally supported on the front side of the rear wheel of the main frame, a crank gear is rotatably supported between a pivotal-support portion of the saddle post and a pivotal-support portion of the stay, a chain is looped over the crank gear and a small gear provided on the rear wheel, and the stay, the saddle post and the handle shaft can be folded so as to be overlaid one another along the main frame.

Abstract: A stretchable bicycle comprises a separate but connectable crossbar consisting of a sliding bar extended rearward from a head tube of front frame and a cross tube fixed to a support tube of rear frame, the cross tube being adapted to telescopically receive and permit the sliding bar to project from its rear end. Also, two quick-releases are provided for fastening the sliding bar at both ends of the cross tube respectively. Hence, a distance between two wheels can be adjusted by sliding a desired portion of the sliding bar inside the cross tube.

Abstract: The universal folding bicycle according to the invention has the front arm (1) that is attached to the head assembly (2) on the frame (3) where the front swing arm (4) with the front wheel (22) are attached. The freely adjustable handlebars (9) are attached. The freely adjustable handlebars (9) are attached to the head assembly (2) via the rotary joint (5), the telescopic rod (6) and the handlebar axis (8) or via the handlebar attachement (7). The back wheel (13) is attached to the back swing arm (10) connected to the central assembly (11) formed by the pedals and cranks 12) and mounted on the frame (3). The back swing arm (10) can be equipped by the accessory arm (26). The seat (16) on a telescopic stem (15) is attached to the end of the frame (3) or via the pin (14) to the beginning of the frame (3). The seat (16) may be located in the swing arm (23) and may be equipped by the telescopic seat springing (24) or by the arm springing (25).

Abstract: A mini-bicycle includes a one-piece main tube and a head tube section which runs above fixing or locking structure in a side view and is tilted relative to the alignment of the steering tube which runs underneath the fixing or locking structure. A rear assembly brace structure is connected on its one end via a horizontal axle to the seat tube and on its opposite end via the horizontal axle to the main tube. The rear assembly brace structure has an additional axle or articulated axle in its middle area.

Abstract: A folding bicycle comprises a frame including a front part whereon is mounted pivoting a steering rod having a lower end provided with a first wheel and an upper end provided with a handlebar, a rear part whereon is mounted a second wheel, and a central part whereon are mounted a saddle and a crankset connected to the rear wheel by transmission elements, such that the saddle, the crankset, the steering rod, the front wheel and the rear wheel are substantially contained in a common plane when the bicycle is unfolded. The frame includes elements articulating the front part and the rear part to the central part to reduce the bicycle wheelbase associated with elements for maintaining at least the front wheel and the rear wheel in the plane.

Abstract: Improved components are provided for a bicycle which is powered by pedals, motor, or engine. Such bicycle can be folding or non-folding, The two components are 1) lever-locked handlebars mounted upon a sturdy steering column and 2) a sturdy offset seat column which can be height-adjustable. Included is a handle bar assembly having a pair of foldable handle bars mounted to a center section, which is mounted in turn on a steering column. Each of the handle bars has a cam mounted thereto with a lever attached to the cam, so that when each handle bar is pivoted up to its extended operating position, a lever and cam are pivoted so that the cam overlaps the center section in close proximity, holding each handle bar in such extended position. Pulling the levers out of their respective pockets and pivoting them and their cams in the reverse directions, releases the respective handlebars so that they can fold downwardly toward the steering column in a compact manner.

Abstract: Bicycle (1), comprising a first frame part (2) connected to a second frame part (13). The second frame part (13) is provided with a drive (14), comprising a crankshaft (16) carrying a driving gear blade (19) and a rear axle (17) carrying a driven gear blade (23). The bicylce (1) has as a particular feature that the drive (14) further comprises a gear hub (18) carrying a first, input gear blade (27) and a second, output gear blade (28), which gear hub (18) is mounted on the second frame part (13) at a distance from the rear axle (17).

Abstract: In cycles, including tricycles, having a longitudinally extending frame supporting a front wheel and a subframe including a rear axle supporting a pair of laterally spaced rear wheels, and supporting a seat for a rider, and having a headtube comprising a tubular member extending axially along a steering axis, a front handlebar stem comprising a tubular member extending axially downwardly into the headtube, and a front wheel fork yoke comprising a tubular member extending axially upwardly into the headtube, simplified quick tool-free mounting assemblies are provided, including a tool-free frame-to-subframe mounting assembly mounting the frame to the subframe with an insertion motion requiring no tools, a tool-free seat-to-frame mounting assembly removably and adjustably mounting the seat to the frame with an insertion motion along the direction of travel of the cycle and requiring no tools, and a tool-free stem-to-yoke mounting assembly mounting the stem to the yoke with an insertion motion requiring no tools.

Abstract: In a tricycle having a longitudinally extending frame supporting a front wheel, a pair of laterally spaced rear wheels, and a seat for a rider, a protective footwell is removably mounted to the tricycle and supports the feet of the rider in stroller mode.

Abstract: A tricycle structure comprises a rear frame secured to a main frame of the tricycle. The structure of securing the two parts is a quick-released type, which comprises a pair of sleeves at the rear end of the main frame with a through hole, respectively. The rear frame has a pair of posts corresponding to the sleeves of the main frame. Each post has an elastic element with a knob which is urged to extend through the corresponding hole of the sleeve. While the posts are inserted into the sleeves, the main frame holds the rear frame firmly.

Abstract: A detachable bicycle is disclosed. The bicycle comprises a front frame section comprising a joint tube at a rear end of the crossbar; a rear frame section comprising a sleeve extended forward, obliquely from the bottom bracket for receiving a lower portion of the down tube, and a seat tube extended upward from the bottom bracket to have its upper portion inserted into the joint tube wherein the seat tube is substantially perpendicular with respect to the down tube; and a seat post inserted through the joint tube into the seat tube. The seat post and the seat tube are secured to the joint tube by means of a first quick release and a second quick release respectively. The down tube is secured to the sleeve by means of a third quick release.

Abstract: The present invention 10 discloses a new and novel tricycle with adjustable linkage 48, 54 for varying the drive power for either foot or hand power. Furthermore, the linkage 44, 52 can also be used to vary the wheelbase. Moving the front wheel 14 toward the rear wheels 22 provides for a tighter turning radius. Moving the front wheel 14 away from the rear wheels 22 provides for greater stability at high speed In addition, the linkage 48, 54 provides for the selective placement along a horizontal and/or vertical plane relative to the seat 24 allowing persons of varying size to comfortably position the pedal assembly 16. Additionally, the present invention 10 has a cantilevered seat frame 30 with the seat 24 at one distal end and the other end forming a yoke 32 connected to the front wheel steering pivot column 34 whereby left movement of the seat 24 results in a right turn of the front wheel 14 and a right movement of the seat 24 results in a left turn of the front wheel 14.

Abstract: A flexible bike frame includes a top bar assembly, a lower bar assembly having a forward end connected to the top bar assembly and extending downwardly and rearwardly, and a seat bar assembly mounted on the rear end of the top bar assembly and extending downwardly from the top bar assembly toward the lower bar assembly. A shock reducing assembly reduces the amount of force transferred from a riding surface to a user. A plurality of joint assemblies are mounted on the frame for permitting changes in the distance between the ends of the top bar assembly. A first joint assembly is positioned between front and middle sections of the top bar assembly, a second joint assembly is positioned between middle and rear sections of the top bar assembly, and a third joint assembly is positioned on the lower bar assembly adjacent to the sprocket drive assembly.

Abstract: The present invention 10 discloses a new and novel tricycle with adjustable linkage 48, 54 for varying the drive power for either foot or hand power. Furthermore, the linkage 44, 52 can also be used to vary the wheelbase. Moving the front wheel 14 toward the rear wheels 22 provides for a tighter turning radius. Moving the front wheel 14 away from the rear wheels 22 provides for greater stability at high speed. In addition the linkage 48, 54 provides for the selective placement along a horizontal and/or vertical plane relative to the seat 24 allowing persons of varying size to comfortably position the pedal assembly 16. Additionally, the present invention 10 has a cantilevered seat frame 30 with the seat 24 at one distal end and the other end forming a yoke 32 connected to the front wheel steering pivot column 34 whereby left movement of the seat 24 results in a right turn of the front wheel 14 and a right movement of the seat 24 results in a left turn of the front wheel 14.

Abstract: A bicycle capable of being folded twice for storage and carrying comprises a frame body, a chain driving unit, a control unit, and a cushion unit. One end of the frame body is formed with a pivotal hole for being engaged with a locking screw and an opening hole for being engaged with a quick-detaching screw. Thereby, the lock frame body and the telescopic rod are connected by the two screws so that the frame body is foldable with respect to the telescopic rod. The similar structures are used to lock the frame body and the cushion unit so that the frame body is foldable with respect to the cushion unit. As a result, a bicycle capable of being folded twice for storage and carrying can be realized by above-mentioned structure.

Abstract: A compound drive foldable bicycle consisting of a bicycle in an unfolded state having a length between the outer edges of a front and a rear wheel that is divided into three sections such that the rear wheel is swung up and down into the unfolded and folded state on a second drive shaft that serves as a pivot point, while the front wheel is horizontally swung into the folded and folded state via a foldable locking mechanism that serves as a pivot point and which is positioned on the down tube (or the top tube) and, furthermore, situated within the circumferential perimeter of the chainring. As a result, the rear wheel is postured at the lower extent of the chainring and front wheel is postured at the lower extent of the saddle when the bicycle is in the folded state such that it is of the smallest and most flexible physical dimensions to save space and reduce packaging material requirements, thereby facilitating storage, placement, and shipping.

Abstract: A compact folding handle bar apparatus for a bicycle is provided. The folding handle bar apparatus includes a first handle bar and a second handle bar each having formed thereon a handle holder. Each handle holder is formed with a hollow body configuration and has transversely projecting therefrom a pair of connecting members separated one from the other by a gap. A pin is pivotally coupled to extend between the connecting members of the first handle bar. The folding handle bar apparatus also includes a stem coupled to the first and second handle bars, as well as a control screw device coupled to the pin through the gap between the connecting members of the first handle bar. The control screw device is displaceable with the pin between fastening and releasing positions relative to the first and second handle bars. In the fastening position, the control screw device extends at least partially through the gap formed between the connecting members of both the first and second handle bars.

Abstract: A connecting element, particularly for connecting rear forks, also known as monostays, made of carbon to bicycle frames. The connecting element is constituted by a first insert and a second insert which are mutually detachably associable at a first end by way of mechanical connection element. The first and second inserts are respectively associated, at a second end, advantageously by way of adhesives, with the stem of a carbon monostay, and are associable with, or rigidly coupled to, a tubular extension of the frame.

Abstract: A bicycle and a bicycle folding method which allow a rider to easily and securely fold and unfold the bicycle is described. The bicycle has a front wheel and a rear wheel; a saddle on which a rider rides; a pair of pedals to which the rider imparts drive force; a first frame for holding the front wheel in a rotative manner; a handle for changing the direction of the front wheel; a second frame for holding the rear wheel in a rotative manner; and a linking portion for linking a linking member of the first frame with a linking member of the second frame, wherein the first frame and the second frame are brought close to each other by the rider's lifting the linking portion with the front wheel and the rear wheel kept in contact with the ground, thereby folding up the bicycle with the front wheel and the rear wheel overlapping each other in at least one portion.

Abstract: A two-axled vehicle, such as a scooter, is provided having a frame with a platform section. The platform section is connected at the front to a steering column. The vehicle has a front wheel arranged on a steering rod, toward a front of the vehicle, and a back wheel toward the rear. The frame has a back section or tailpiece behind the platform section which projects as far as behind the wheel area and on which the back wheel is arranged. The back wheel has an axle which is supported by a shaped part that can pivot freely with respect to the tailpiece about an axis which is directed downwards and forwards at an acute angle with respect to the support surface (“the road”) for the two wheels.

Abstract: A tandem adapter frame that attaches to the back of a single-rider bicycle, transforming the bicycle into a tandem bicycle. The rear wheel of the single-rider bicycle is removed from the bicycle and installed on the back end of the adapter frame. The adapter frame is attached to the single-rider bicycle at the seat post and the rear dropouts, resulting in a rigid 3-point connection. This transforms the single-rider bicycle into a rigid frame, two wheel, tandem bicycle with a rider in front and a rider in back. Both riders have pedals. An adapter axle assembly with sprockets on the lower front of the adapter frame serves two functions. It easily attaches between the rear dropouts of the single-rider bicycle using a standard axle and quick-release, and it transmits drive power to the rear crank without modifying the drive chain of the single-rider bicycle.

Abstract: A collapsible tricycle for the use of young children has a front wheel, two rear wheels, a saddle, and a frame, to which the saddle is pivoted. The frame includes a front part, a stationary part secured to the front part, a rear part, and a connecting rod. The stationary part has two parallel walls at the rear portion; the front end of the saddle is pivotally connected to upper portions of the walls; the front portion of rear frame part is pivotally connected to the lower portions of the walls. The rear frame part has two parallel walls defining a space wider than the stationary part such that the stationary part can be partially received in the space when the tricycle is folded, allowing the folded tricycle to be relatively compact. The middle of the saddle is pivoted to the rear frame part. And, the connecting rod is pivoted to both the stationary part and the rear frame from two ends for preventing both from moving relative to each other when the tricycle is ridden.

Abstract: Wheeled personal mobility vehicles with extremely thin stowed profiles are provided, which in one embodiment, include a plurality of movable, collapsible wheel axle assemblies which are supported on a support frame and movable between an operative state where the wheels provide rolling support, and a collapsed state where the wheels are moved into the side elevational profile of the device. The embodiment provides for both integrated propulsion and steering linkage to the wheels when they are manually moved into their operative position, along with a collapsible steering mechanism, a support base and at least one collapsible seat. This embodiment may also provide for pedal power, battery, fuel cell or motive power as well as remote control operation.

Abstract: An improved foldable tricycle that extends and transforms to accommadate one two or three riders. It is safe to operate easy and convenient to transform, transport and store. The tricycle has a front wheel traction with a spracket secured to the front portion of the front fork. A continios chain going from the sprocket to the front wheel The tricycle has a steering assembly which is pivotally secure to the front portion of a frame assembly. A front wheel rotatably attached to the front fork which is used for the traction, and two rear wheels rotatably secured to the rear portion of the frame assembly. Including a version with a single wheel on the rear frame and the same front end frame. When the releasable pin that is located below the seat of the frame assembly is released and pulled up, forces the rear wheels to go inwards towards the front, making it narrow and short on length for storing or transporting the tricycle.

Abstract: A folding structure for a child tricycle comprises a handle inserted with a vertical tube into a head tube of a frame, a frame divided into a front and a rear sections pivoted together, a seat, and a shock absorber. Wherein, one end of a flexible cord is fixed in the vertical tube of the handle and another end fixed in the head tube then secured with a quick-release connector. The front section of the seat is pivoted to the front section of the frame and the rear section of the seat is connected to one end of the shock absorber while another end of the shock absorber is pivoted to the rear section of the frame. A protruding pin and a convex plate provided with a positioning hole at a rear end of the front section of the frame and correspondingly, a lateral stop and a fastener at a front end of the rear section of the frame.

Abstract: A stretchable bicycle comprises a separate but connectable crossbar consisting of a sliding bar extended rearward from a head tube of front frame and a cross tube fixed to a support tube of rear frame, the cross tube being adapted to telescopically receive and permit the sliding bar to project from its rear end. Also, two quick-releases are provided for fastening the sliding bar at both ends of the cross tube respectively. Hence, a distance between two wheels can be adjusted by sliding a desired portion of the sliding bar inside the cross tube.

Abstract: Foldable two-wheeled vehicle comprising a frame in which there is provided at least one central body (10), at least one group (20) supporting the rear wheel (21), at least one group (60) supporting the front wheel (61) and at least one group (50) for steering the front wheel (61), which are respectively hingeably joined to the central body (10), there being provided means for controlling (70) and actuating (L72,L73,L74, L75,L76) the rotation of groups (20,50,60) around the central body (10), so as to close/open the frame from an open configuration suitable for use to a closed configuration suitable for transportation and vice versa.

Abstract: The present invention is a collapsible two-wheeled vehicle, wherein the vehicle comprises a down tube and a horizontal stay that are pivotably connected to one another at midsections thereof as well as being slidably connected to steering and seat assemblies, respectively. The slightly canted arrangement of the various members and assemblies provides a rigid structure to support an operator during use yet allows the vehicle to be collapsed to a compact size for storage and shipping. The vehicle may be folded or collapsed in the form of an “X”, bringing the wheels into a side-by-side position, to reduce its overall size without compromising its structural rigidity when reopened.

Abstract: A folding structure for a bicycle comprises a connector at the front end of a rear fork with a hole on the top side, the upper strut has a fixture with a hole corresponding to the hole of the connector to secure the connector thereat with a bolt, the opposite side of the fixture has a recess which secures a handle thereat, the rear fork also comprises a confining device, which allows the rear fork to swing with respect to the seat strut after the shock absorber is disengaged, thus save storage space.