Abstract: An improved bicycle includes a selective positioning system for providing rider-controlled vertical movement of a passenger support construction relative to the bicycle wheels. The bicycle employs an energy conversion construction that converts rotational energy from one of the bicycle wheels into translational energy. This translational energy is utilized by cooperative lifting assemblies to move the passenger support construction.

Abstract: This lightweight folding bicycle adopts the four-bar-linkage-folding-frame. Two diagonal-bar-hinges are added. Each diagonal-bar-hinge is made up of two parts. One end of the diagonal-bar-hinge hinge joints in the middle of a seat tube at the same point as a standing tube hinged, the other end of the diagonal-bar-hinge joints in the middle of a crossbar at the same point as a down tube hinged. There is a four-bar-linkage-speed-folding-fastener on a handlebar stem and a folding device on the pedal. This type of folding bike is of simple structure, reasonable design and easy to fold. The four-bar-linkage-speed-folding-fastener grips a large area, which can press half the circle as maximum, so as to enlarge the suffering area and balance the received force. It is easy and quick to fold the bike and safe to drive.

Abstract: A child's cycle is provided which is adaptable, as the child grows, between a tricycle configuration and a bicycle configuration, the cycle comprising a frame 4, 13, 14 with, in the bicycle configuration, a bicycle axle mounted on the frame and able to carry a rear wheel 8; and in the tricycle configuration, additionally a tricycle axle able to carry a second rear wheel, adapted to be coupled to the bicycle axle to form an axle 9 carrying two wheels, the axle being mounted on the frame. For this, one end of the bicycle axle is adapted for coupling it either to the frame or to the tricycle axle.

Abstract: A baby tricycle, which includes a head unit holding a pair of handlebars, a front wheel, and a pair of pedals, a body unit having a seat frame, a saddle mounted on the seat frame, and a rear wheel frame holding a pair of rear wheels, and a folding collapsible connecting frame unit coupled between the head unit and the body unit, the folding collapsible connecting frame unit including rear tubular connecting rod having a rear end welded to the rear wheel frame of the body unit and a front end pivoted to the rear end of the seat frame, a link, and a front locating frame, the front locating frame having a front end fixedly connected to the head unit and a rear end coupled to the front end of the rear tubular connecting rod by the link and a coupling portion on the middle pivoted to the front end of the seat frame.

Abstract: A bicycle frame is hereby provided which allows component assembly at the point of manufacture by a method other than welding. The present invention is a novel frame design which includes multiple aluminum extrusions, with each of those extrusions being machined and anodized prior to assembly. Further taught is a unique A-X frame configuration and simplified construction.

Abstract: A pivotal device for connected two parts of a foldable bicycle includes two boards each are connected to a part of the bicycle and are pivotally connected with each other. A clutch device is connected between the two boards and includes two pins extending through the two side plates of each of the two boards. Each of the pins are movable to disengage from one of the two boards to allow the two boards to be pivoted away from each other. A secure device is connected to the clutch device so as to secure the pins of the clutch device in position such that the two boards are not pivoted away from each other.

Abstract: A foldable bicycle comprises a front frame (1), a rear frame (21), and a seat tube (20). The front frame (1) and the rear frame (21) are foldable with respect to each other. In a first aspect, a single release clamp (12) releases the front frame from the rear frame in a single operation. This occurs by having the seat tube (20) slotted at the top (11). In a second aspect, the crank housing (34) is positioned in axial alignment with the seat tube (20) and one point (14) of folding occur below the crank housing. This aspect pertains to both a men's and a women's frame.

Abstract: An apparatus is provided for use in a vehicle having a rotatable steering shaft (32) and a locking mechanism (56) for preventing rotation of the steering shaft. The locking mechanism (56) is deactivated by an ignition key (58) in the vehicle's ignition. The apparatus comprises a vehicle steering wheel assembly (20) having a front side (68) facing a driver of the vehicle and a back side facing away from the driver, an inflatable vehicle occupant protection device (90) for helping to protect the driver of the vehicle in a vehicle collision, and a mechanism (60, 110) for removably connecting the inflatable vehicle occupant protection device (90) with the steering shaft (32). The mechanism (60, 110) for removably connecting the inflatable vehicle occupant protection device (90) requires rotation of the steering wheel assembly (20) to accomplish removal of the inflatable vehicle occupant protection device from the steering shaft (32).

Abstract: The present invention relates to a bicycle, the front and back wheels of which are fitted into a collapsible frame. In the folded or collapsed state, the bicycle length dimensions are reduced as compared with the working state, the back wheel is unilaterally fitted into the frame, and the front wheel is unilaterally fitted to the handlebar holding tube which is rotatably mounted on the frame. The bicycle has two wheels with different diameters, an already well-known design, wherein the front wheel with the smaller diameter is covered, in the collapsed state, by the wheel with the larger diameter, so that the smaller wheel is embedded into the larger one. In the collapsed state, the bicycle thickness may be significantly reduced.

Abstract: A cargo support device increases the cargo-carrying capacity of standard two-wheeled vehicles, such as bicycles, motorcycles, and mopeds. The cargo support device includes a base extension frame mounted to the two-wheeled vehicle. The base extension frame can be mounted to the bottom bracket shell or detachably mounted at three connection points to the bottom bracket shell or chainstays and rear wheel dropouts of the two-wheeled vehicle. The rear wheel assembly is transferred from its original dropouts to new dropouts located on the base extension frame. The original chain, rear brakes, and gear accessories, if any, are extended so as to accommodate the displacement of the rear wheel assembly of the two-wheeled vehicle.

Abstract: A personal mobility vehicle having front and rear chassis members interconnected by a locking means. The rear chassis member includes alignment means for aligning the rear chassis with a suspension assembly of the front chassis. An adjustable seat assembly supports a user while preventing accidental disengagement of the locking means.

Abstract: A folding bicycle in which all the pivoting members have horizontally pivot axes and all the members are indirectly connected to a single collar that slides up and down a seat post. In order to achieve an open or closed state, the collar is made to slide along the post and is then secured by tightening a quick release lever on the collar. Two front tubes extending between the steering head and the lower part of the seat post are parallel.

Abstract: A foldable bicycle designed so when the bicycle is folded, the front and rear frames bypass each other (non-overlapping) to permit a complete folding position and using a fold on or near the seat tube, and to maintain a rigid open riding position with simple standard fold restraining devices.

Abstract: The present invention relates to semi-recumbent bicyles. A regular upright bicyle is transformed in to a semi-recumbent style bicycle with a minimum number of new parts. An extension appliance, a seat assembly, an extended-length brake and derailleur cables, an extended-length chain, and an extended-length handlebar are used to completely convert a standard bicycle to a semi-recumbent bicyle. The extention appliance connects to the head tube of the standard bicycle. The handle bars and forks of the standard bicyle are relocated to a forward position in the extention applicance. The crank and front sprocket are relocated to a new crank case in the extension appliance. An extended-length chain is used to connect the front sprocket in the new position to the rear sprocket. Extended-length brake and derailleur cables are added if necessary. A new set assebly may be added. This new set assembly includes a back rest portion. An extended-length handlebar may be added if necessary.

Abstract: A bicycle frame has a hinge joint in the column for the handle bars, arranged so that the column is folded to cause the handlebars to be near the pedals, whereby the bicycle is compact for storage and transport.

Abstract: A system for deflating a tire on a wheel of a vehicle upon theft of the vehicle, comprising a wheel mounted unit and at least one remote unit for deactivating the wheel mounted unit via remote signals. The wheel-mounted unit is automatically armed upon stopping of the vehicle and comprises a pressure release assembly mounted in an orifice of the wheel for deflating the tire, a sensor adapted to sense wheel rotation and wheel speed, and a controller connected to the sensor and pressure release assembly for activating the pressure release assembly in response to wheel rotation sensed by the sensor. There is a receiver for receiving incoming RF signals from the remote unit, and a power supply connected to the pressure release assembly, sensor, controller and receiver. Each wheel could have its own wheel-mounted unit. After deflation, the wheel-mounted units are automatically re-set.

Abstract: A children's tricycle is composed of a front frame, a rear frame, and a connection rod for fastening detachably the front frame and the rear frame. The front end of the connection rod is detachably fastened with the front frame in conjunction with a fastening jacket. The connection rod is provided at the midsegment thereof with a plurality of fastening holes for fastening a seat in conjunction with a plurality of fastening bolts. The rear frame has a bracing body provided with a recessed portion in which the rear end of the connection rod is received.

Abstract: A telescopic element, particularly for frames of folding bicycles, comprising a sliding inner element that can be locked in an operating position within an outer element by a quick locking element, the locking element comprising a ring that is normally in the position for locking the axial movement of the inner element with respect to the outer element, the locking element being movable radially by means of a release button.

Abstract: The present invention is a bicycle which permits the rider to operate the bicycle while in the prone position. A novel sling is provided to support the torso of the rider. The sling is a hammock-style sling which supports the rider comfortably and enables the rider to go much farther, without tiring, than other prone bicycles. Further, the sling is made of nylon, or other fabric, which allows the rider's chest cavity to expand in order to facilitate breathing. And, unlike other prone bicycle designs, there is no sliding up and down with this hammock-style sling. A telescoping frame and pivoting handgrips enables the rider to adjust the bicycle to his or her own body dimensions. The present invention provides less wind resistance due to the prone position of the rider. Also, the alignment of the arms and hands with the legs and feet allows the pushing force of the legs and feet to be opposite to, and in line with, the pushing force of the arms and hands.

Abstract: A collapsible bicycle includes a body frame including a front wheel rotatably mounted on a first end portion thereof, and a seat tube fixedly mounted on a second end portion thereof. A rear frame includes an upright tube disposed beneath the seat tube, a pair of seat stays each extending from the upright tube, a rear wheel rotatably mounted between the pair of seat stays, and a pair of supporting brackets each having a first end portion fixedly mounted on a corresponding one of the pair of seat stays and a second end portion located at a position flush with the rear wheel. A pivot mechanism is pivotally connected between the seat tube and the upright tube such that the upright tube can be pivoted relative to the seat tube, thereby pivoting the rear frame toward the front wheel of the body frame to a position where the second end portion of each of the two supporting brackets together with the rear wheel can be supported on the ground synchronously.

Abstract: A lock for a device having as a component thereof critical for use and/or operation thereof a tubular member, includes a tubular insert for disposition in a gap provided in the tubular member such that the insert becomes a portion of the tubular member, a lock member for encircling an anchoring structure and for making a locking connection to the insert. The insert is provided with a frangible portion which renders the insert more susceptible to breaking than the lock member. Upon breaking of the insert, the tubular member portion is broken to provide the device with a broken component critical to the operation thereof.

Abstract: A folding, pedal-driven vehicle having a universal joint transmission system is provided. A human-powered ground vehicle having a motive power input assembly that includes foot pedals to drive a front-wheel of the vehicle through a universal joint drive gear system is also provided. Folding, recumbent vehicles for one or two riders are also provided and each includes a transmission system having a pedal-drive power input assembly pivotally connected to a universal joint which in turn is pivotally connected to a drive connection for driving a front wheel of the vehicle.

Abstract: A foldable bicycle frame includes a head tube, a downtube unit, a chain stay unit, a telescopic seat unit, and a seat stay unit. The head tube is adapted to be coupled with a front fork for carrying a front bicycle wheel. The downtube unit has a front end connected to the head tube, and a rear end. The chain stay unit has a horizontal front end portion that is connected foldably to the rear end of the downtube unit and that is adapted to be mounted with a crank arm assembly, an inclined vertical rear end portion, and a middle portion that is between the front and rear end portions and that is provided with means for carrying a rear bicycle wheel thereon. The telescopic seat unit has a top end adapted to be mounted with a bicycle seat thereon and a bottom end connected pivotally to the front end portion of the chain stay unit. The seat stay unit has a front end pivoted to the top end of the seat unit and a rear end pivoted to the rear end portion of the chain stay unit.

Abstract: A collapsible bicycle frame includes a main frame having a front frame and a rear frame. A rear end of the front frame and a front end of the rear frame are pivotally connected. The rear end of the front frame includes a first engaging mechanism while the front end of the rear frame includes a second engaging mechanism for securely engaging with the first engaging mechanism when the front frame and the rear frame are in an extended status, and the first engaging mechanism and the second engaging mechanism disengages from each other when collapsing the bicycle.

Abstract: A seat height adjusting device includes a seat post slidably received in a tube, the tube having a slot defined longitudinally therein and the seat post having a rack section defined in a periphery thereof, a C-shaped clamp member securely clamped to the tube and having an extending plate extending from each one of two end sides thereof which are connected by bolts, a pinion rotatably disposed between the two extending plates and engaged to the rack section of the seat post, a crank extending centrally through the pinion and a pin extending through the crank and the pinion such that when rotating the crank, the seat post is moved upwardly or downwardly in the tube by the pinion.

Abstract: A bicycle frame which includes a shock absorber assembly which is coaxial and integral with the top tube of the frame. The entire shock absorber assembly is positioned within the top tube and thus completely forward of the seat tube and rearward of the head tube. The frame typically comprises two rear wheel support tubes each of which is integral with a rear wheel dropout at their lower end and each of which is detachably connected to one of two compression struts at its upper end. Each of the compression struts is separately, detachably and pivotally connected to the shock absorber assembly. The rear wheel dropout holds the axle of a rear wheel. The frame is configured such that when the rear wheel moves upward as in traversing a bump on the road the rear wheel dropout undergoes an arcuate motion which is translated to a linear motion of a piston in the shock absorber assembly via the rear wheel support tube and compression struts.

Abstract: A vehicular automatic occupant sensing anti-carjacking system primarily designed to automatically and continuously protect a vehicle from carjacking and to provide preventive protection to the authorized occupant of the vehicle from being taken hostage in their own vehicle and to facilitate the recovery of a vehicle during a carjacking regardless, whether the vehicle is occupied or unoccupied, regardless, whether the vehicle is attended or unattended, regardless, whether the ignition is on or off and regardless, whether the engine is running or not running. The system includes an electronic Command Control Unit which communicates with a plurality of sensors to provide the necessary input signals to the command control unit. The system has a means for automatically monitoring and determining the occupancy status of the vehicle via pre-programed occupancy status instructions.

Abstract: A wheelchair with two facing, interconnected, adjustable sideframes having fit thereto a seat, backrest, driving wheels and guide wheels is described. The wheelchair is characterized in that each sideframe has two rigid frame parts, which are adjustably interconnected in the longitudinal direction of the wheelchair by elongated frame sections. On one rigid frame part of each sideframe can be fit one of the driving wheels and on the other rigid frame part of each sideframe one of the guide wheels. The wheelchair frame is readily longitudinally adjustable. Simultaneously with the adjustment of the seat position, there is an adjustment of the wheels so that an optimum weight distribution over the wheelchair wheels is maintained. The frame has an extremely high rigidity.

Abstract: A tandem bicycle which includes a bicycle and a rear cycle unit coupled to the seat tube of the bicycle by a coupling, the rear cycle unit including a top tube, a down tube, a bottom bracket, a seat tube, a saddle and post assembly, a seat stay and bottom fork assembly, a free wheel, a crank and pedal assembly, and a handlebar, wherein the top tube and down tube of the rear cycle unit are respectively comprised of two sections pivotably connected together and secured in the operative position by a lock pin so that the rear cycle unit can be collapsed when not in use; a disk is mounted on the crank and pedal assembly and turned by it; an adjustable damper is mounted on the seat tube and down tube of the rear cycle unit and controlled by an adjustment screw to give a damping force to the disk.

Abstract: An electrically-powered scooter vehicle for use by elderly, disabled and infirm people includes a self-locking connection means for connecting front and rear frame portions of the scooter. The scooter is convertible between three-wheel and four-wheel versions without use of tools. Automatic shut-off circuity minimizes inadvertent loss of battery power due to failure to turn off the scooter. An adjustably lockable telescoping tiller facilitates use of the scooter by persons of all sizes.

Abstract: A recumbent bicycle frame having a frame tube with a first shoulder area formed on a side thereof. The shoulder area extends for at least a portion of the length of the frame tube. The frame tube has a generally flat exterior surface above the first shoulder area. The frame tube also has a second shoulder area formed on an opposite side of the frame tube from the first shoulder area. The frame tube has a bottom shoulder area formed on the side of the frame. A generally flat exterior surface extends below this bottom shoulder area. An interior passageway extends longitudinally through the frame tube and includes first and second notched areas formed in the wall of the interior passageway. These notched areas receive a reinforcement tubing member therein. First and second slots are formed at the top and at the bottom of the wall of the interior passageway of the frame tube. A clamp member is removably connected to the first and second shoulder areas and has a portion extending across the flat exterior surface.

Abstract: A recumbent bicycle including a frame having a longitudinal main tube divided into a main tube front section telescopically inserted into a main tube rear section to form an adjustable length frame. A forked yoke is pivotally fixed to the main tube front section. A front wheel is rotatably mounted on the yoke. A rear wheel is rotatably fixed to the main frame adjacent the frame rear end. A pedal assembly of a driving mechanism for driving the rear wheel is mounted on the main tube front section adjacent the frame front end. A seat and a handle assembly are mounted on the main tube rear section adjacent the frame rear end. A linkage rod operatively connects the handle assembly and the front wheel yoke. The linkage rod is preferably slidably mounted on a central member of the handle assembly allowing a user to modify the steering ratio between the rotation of the handlebar assembly and the corresponding rotation of the front wheel yoke.

Abstract: A bicycle frame with shock absorbing system is used to eliminate the shocking force occurring on the connecting portion of a seat tube fixedly mounted on a bottom bracket and a down tube. The system includes a shock absorber mounted between the seat tube and the down tube. A pair of brackets are integrally formed with bottom bracket and extend toward the down tube. A pivot is fixedly secured to the brackets. A pivot mounting tube is integrally formed on a rear end of the down tube and pivotably mounted on the pivot.

Abstract: The frame (2) for a collapsible bicycle of the present invention includes a head tube (10), a front frame (11), a rear frame (12), a handlebar locking mechanism (14)and a frame locking mechanism (17). On the head tube (10) the front fork (4) is mounted to support the front wheel (5). The front frame (11) is coupled to the head tube (10) in a manner that allows the leading edge to freely rotate perpendicular around the axis using a bearing (13). The rear frame (12) is coupled to the front frame (11) in a manner that allows the leading edge to freely rotate perpendicular around the axis using a hinge (16) as well as be able to support the rear wheel (6) on other edges. The handlebar locking mechanism (14) locks and freely releases the head tube (10) and front frame (11). The frame locking mechanism (12) locks and freely releases the front frame (11) and rear frame (12).

Abstract: An assembly for adjustably supporting a rear wheel of a bicycle at a desired orientation relative to a bicycle frame. The inventive device includes a bicycle frame having a rear vertical member. A rear axle support member is pivotally mounted to a lower portion of the rear vertical member and projects outwardly therefrom to support a rear axle of a rear wheel. An adjustment assembly extends between the rear axle support member and an upper portion of the rear vertical member to adjustably support the rear axle support member at a fixed angle relative to the rear vertical member of the bicycle frame.

Abstract: A suspended, gravity centering, shock absorbing seat mount includes a pair of elongated mounting brackets (2) for attaching the seat mount to a vehicle. An upper pivot shaft (5) extends laterally between the mounting brackets. A shackle (3) is mounted at an upper end thereof to each opposite end of the upper pivot shaft (5). A lower pivot shaft (7) is mounted to a lower end of each shackle, and extends laterally outwardly therefrom. A casing (14) is mounted at a bottom end thereof to each of the lower pivot shafts, and a seat mounting member (15) extends laterally between upper ends of the casings. The shackles are free to move in an arc about the upper pivot shaft, and the casings are free to move in an arc about the lower pivot shafts, thus allowing the seat mounting member to move forwardly and rearwardly in response to forward and rearward motion of the vehicle, and returning the seat mounting member to a central position by gravity.

Abstract: A polygonal frame self-locking bicycle includes a head tube mounting a wheel-containing front fork, a down tube rigidly connected between the head tube and a pedal crank housing, a seat tube mounting a rear fork and wheel and rigidly connected to the crank housing and a top tube locking with and demountable from at least one of the head and seat tubes. Preferably, a top tube end is key-locked to the seat tube and the other end affixed to a clamping cylinder around the head tube. Loosening of the clamping cylinder permits pivoting an unlocked top tube to open a space between the seat and head tubes. The demounted top tube forms a frame opening that can be leaned past a vertical pole and the top tube remounted and relocked locking the frame about the pole.

Abstract: Vertical and longitudinal shocks imparted to a bicycle seat are absorbed by a compression spring disposed between the seat and the seat strut, with one end of the spring being mounted to a seat retainer that is moveably secured to a pair of slide plates which are in turn slidably engaged with a stationary strut head. A semi round seat secured to the strut head permits the angle of inclination of the bicycle seat to be adjusted. The compression strength of the spring may also be adjusted by urging a cover towards and away from the moveable end of the spring.

Abstract: A recumbent bicycle has a tubular frame member with a longitudinal axis running from front to rear. A rear support module includes a saddle for nestingly embracing a rear portion of the frame member. Cantilever support members extend downward from the saddle to free ends which are attached to an axle for a rear wheel. A head tube and bearing attached to the front of the frame member support a head shaft and a fork with a bifurcated lower portion suitable for mounting a front wheel. The fork lies generally in a plane and is supported, set forward of the head shaft, by extension plates such that the head shaft axis intercepts the fork plane. A drive sprocket assembly is at the front of the frame member. A seat assembly has opposing track slides engaging a track at the top of the frame member. The slides can be drawn together to clamp the track and fix the seat.

Abstract: A foldable bicycle frame member includes first and second shafts connected pivotally at one end and a locking unit for retaining releasably the first and second shafts in a coaxial position. The locking unit includes a first locking arm having a first end connected pivotally to the second shaft, and a second locking arm having a first end connected pivotally to a second end of the first locking arm and a second end connected pivotally to the first shaft. The first and second locking arms are formed as elongated members that are generally U-shaped in cross section. A retaining pin extends through pivot holes formed in the first end of the second locking arm and into longitudinal slots formed in the second end of the first locking arm. The position of the retaining pin in the slots when the second locking arm is received in the first locking arm can be adjusted to adjust the force for retaining releasably the first and second shafts in the coaxial position.

Abstract: This invention discloses a front wheel steering, front wheel drive, light weight, foldable, ground transportation vehicle. The disclosed vehicle is constructed for convenient manual transformation between a deployed operating configuration, for transporting one or more passengers, and a compactly folded position, for facilitating toting the vehicle about as well as stowing it away. Two-wheel and three-wheel versions of the vehicle are set forth. Both such embodiments can utilize basically the same drive and steering constructions.

Abstract: An adjustable pedal arm is mounted on an occupant powered vehicle. The pedal arm is elongated and tubular, extending from one end, mounting pedals and cranks, to a remaining end that is pivotably mounted to the vehicle frame for adjustable pivotal movement about an axis. An internal drive assembly is provided within the pedal arm, extending from the crank arms to the remaining end of the pedal arm. An external drive assembly connects the internal drive assembly to at least one of the vehicle wheels. An adjuster is mounted between the pedal arm and vehicle frame to permit selective adjustment of the pedal position relative to the occupant seat. The pedal arm with the use of a pedal arm adjuster, pivots about a jack shaft located on the vehicle frame to meet the occupant's preferred pedal position.

Abstract: An improved locking hinge for use in a folding bicycle is equipped with a lever arm which is in pivotal connection to a locking hook at the bottom end thereof. The locking hook also pivotally mounted onto the handlebar of a bicycle has a retaining recess which is made to engage with a locking pin mounted onto the steering stem of the bicycle so as to get a folding bicycle in use as long as the lever arm is pushed toward the erected handlebar which is put in linear alignment with the steering stem already. Besides, a securing spring plate is used to retain the lever arm in place so as to prevent the locking hook from disengagement from the locking pin as the bicycle is in use. To get the bicycle folded, the securing spring plate is lifted upwardly to permit the lever arm to pried outwardly, resulting in the locking hook disengaged with the locking pin. Then the handlebar and the steering stem are separated with each other and put side by side in a folding manner.

Abstract: A torque transmitting, bicycle frame coupling which connects to the frame tubes, replacing a portion of those tubes and having teeth on their engaging faces. Proper installation of two such couplings allows up to a 25 inch men's style bicycle with up to 700C (26 inch rim diameter) wheels to be cut in two pieces so that it fits in a suitcase with a combined height, width and girth measurement no larger than 62 linear inches and then be put back together with no loss of original frame geometry or stiffness. Each coupling is actuated, pulling the bicycle pieces together and joining them through use of specialized teeth under compression by a threaded lug, a removable-shoulder lug with a removable shoulder and a threaded coupling nut. The removable shoulder makes the nut and shoulder replaceable, and makes possible an additional shoulder on the tube connecting end of the removable-shoulder lug to keep the nut from slipping onto the frame and scratching the paint.

Abstract: A controlling mechanism for folding mechanism includes a front frame member and a rear frame member. A coupling mechanism generally includes a coupling tube which forms also a part of the front frame member and a coupling shaft which forms also a part of the rear frame member. The coupling tube can be rotatably and slidably mounted to the coupling shaft to facilitate an easy folding of the front frame member with respect to the rear frame member.

Abstract: A foldable bicycle including (a) a stem tube including a first section slidably mounted in a second section pivotally linked to a third section, a handle bar mounted on the first section of the stem tube, the third section of the stem tube rotatably mounted in a head tube and (b) a top tube comprising a first section pivotally linked to a second section, the first section of the top tube fixed to the head tube, the second section of the top tube fixed to a downtube and a seat tube wherein a seat post is slidably mounted.

Abstract: A foldable bicycle frame comprises a front frame made up of a head tube, a top tube and a down tube, and a rear frame made up of a seat tube, a bottom bracket tube, a seat stay and a chain stay. The top tube is provided at the rear end thereof with a connection tube to receive therein a seat post. The bottom bracket tube is provided at the center of the front end thereof with an extension tube which faces the front wheel and is pivoted at the front end thereof to the bottom end of the down tube. The front frame and the rear frame are fastened together by means of the seat post which is inserted into the connection tube and the seat tube. The front frame and the rear frame are rotatable in relation to each other when the seat post is pulled out of the seat tube.

Abstract: A joint assembly adjusts the height of a bicycle saddle and includes an elongated seat tube member, a joint member made of a carbon-fiber composite material, a seat post, and a hoop member. The joint member has an upper connecting portion, a lower connecting portion, and a longitudinal receiving chamber formed through the joint member from the upper connecting portion to the lower connecting portion. The upper connecting portion has a plurality of open-ended slots formed therethrough. Each adjacent pair of the open-ended slots define a flexible plate therebetween. The seat tube member is inserted fittingly into the receiving chamber and has a plurality of open-ended slots aligned with the open-ended slots of the joint member, and a shoulder portion which abuts against the bottom surface of the lower connecting portion of the joint member. The seat post extends downward from the bicycle saddle to engage movably the seat tube member.

Abstract: An improved handlebar structure for a collapsible bicycle mainly uses a locking mechanism to clamp and lock the upper tube and the lower tube of the bicycle together. The locking mechanism comprises a bolt, a pressing lever and a U-shaped clamping member. The bolt feeds through the pivotal connection of the upper tube and the lower tube, with its front end being secured to the U-shaped clamping member and its rear end being coupled to the pressing lever.

Abstract: Disclosed herein is a three wheel personal mobility vehicle in which a wheel and drive assembly is readily detached from a vehicle frame by spring loaded pull pins which are connected by a strap so both of the pins can be manipulated simultaneously with a single hand. The invention provides for quick release and reassembly of the drive assembly which is provided with a handle for carrying the same to a trunk of a car or the like.