Abstract: A skateboard device may include a frame, a set of wheels, and a deck. A user or rider may stand on the deck. The deck may be divided into a front panel and a rear panel, on which the user may rest a front foot and a rear foot, respectively. The rear panel may be fixed relative to the frame. The front panel, in turn, may pivot sideways relative to the frame and, in pivoting sideways, may drive a front wheel fork for rotation in order to steer one or more front wheels of the set of wheels left or right. In some embodiments, the skateboard device may include relatively wide, convex, single front and rear wheels facilitating riding the skateboard device not only on hard, flat surfaces but also on other terrains such as, but not limited to, dirt, gravel, etc.

Abstract: The present invention relates generally to motorized vehicles and more specifically to a three wheeled motorized vehicle providing a hybrid crossover between an automobile and a motorcycle that is able to take tight corners like a motorcycle by provision of a segment enclosing the operator that can lean into turns, The front segment contains two wheels for both steering and propulsion and is conventionally constructed like any typical front wheel drive vehicle. The rear segment contains the operator (and optionally passenger) supported on a single wheel, The two segments are joined together via a coupling that both supports the assembly and allows rotation of the rear segment about the longitudinal axis to perform the lean for operator and or passenger comfort, while transmitting critical control functions.

Abstract: A training aid to teach balancing skills for a central wheel structure auto-balancing device and an auto-balancing device having same. The training aids may be variously configured and may be releasably or fixedly coupled to the foot platforms of the auto-balancing device. Disclosed embodiments include various ground contact members and various support structures that hold the ground contacting members. The training aids may be compressive and/or offer ground resistance. The height of the aids, their compressive strength and/or their resistance, among other features, may be adjusted.

Abstract: The invention relates to a bicycle, with a bicycle seat assembly rotatably connected to the bicycle. Rotation movement of the bicycle seat assembly is possible, seen in the driving direction, to the left and to the right side and is independent of the steering movement of the bicycle. The axis of rotation of the bicycle seat assembly is arranged in front of the axis of the bottom bracket, seen in the driving direction, and the seating surface of the bicycle seat is arranged behind the axis of the bottom bracket, seen in the driving direction. The rotatable bicycle seat assembly enables an upright riding position by dodging the cyclist's leg pedaling downwards through a rotational movement. At the same time it supports the hip side of the other leg. The driver is supported by the bicycle seat even in the upright riding position.

Abstract: A two wheeled vehicle is propelled by the feet of a rider and hand-grasped poles when pushing against the ground. A forward wheel on a forward member and a rear wheel on a rearward member align along a longitudinal axis. The forward member rotates about a vertical steering axis. A saddle supports the rider. A torso brace allows the rider to balance and steer the device.

Abstract: The present disclosure provides a small mobility vehicle including: a base unit including a footplate and a plurality of driving wheels mounted on the footplate, a first column unit having a first plurality of links hinged to another link of the first plurality of links, wherein the footplate is coupled to a lower end of a lower link of the first plurality of links and steering handlebars are coupled to an upper end of an upper link of the first plurality of links, and a second column unit capable of being folded or unfolded that has a second plurality of links hinged to another link of the second plurality of links, wherein a lower end of a first link of the second plurality of links is hinged to the footplate and an auxiliary wheel is coupled to one end of a second link of the second plurality of links.

Abstract: A ride-on vehicle is providing having a frame, a plurality of wheels connected to the frame, a receiver extending from the frame and a seat rotatedly connected in the receiver via a seat post. The receiver extends from the frame at a first acute angle greater than 0° with respect to a vertical axis, and the seat post extends from a bottom of the seat at a second acute angle greater than 0° with respect to the vertical axis. As such, when the seat is positioned in the rear facing orientation the seat is positioned at an acute angle greater than 0° with respect to a horizontal axis.

Abstract: A joining member is positioned between the seat and the body in a stationary bike with a seat aligned with the front of the bike body. An extending member projects upwardly from the joining member at an angle that is less than about 30 degrees in relation to the joining member and rearwardly with at least a portion of the extending member being positioned behind the seat rear portion; and a crossbar projects from the extending member essentially perpendicularly to joining member to form a handlebar for providing support for the arms of a rider when the arms are positioned behind the body of the rider. The seat is connected to the body upper surface with an essentially vertical supporting member. The joining member includes a bore for receiving the supporting member.

Abstract: A recumbent bicycle or recumbent tricycle with a removable rear fork that can be swapped with another rear style fork. The rear fork is clamped so that is cannot turn but can be easily swapped. The rear fork can be swapped according to riding conditions or for aesthetics. The rider may use one fork for stiff characteristics, another shock absorbing fork for off-road, or for any style or color at the discretion of the rider, thus allowing greater flexibility. Also, the bicycle includes removable tandem seat for a second rider with a removable pedal assembly for the second rider. In this way the same bicycle can be single or tandem capable. Another feature is a removable pannier rack assembly which adds more choices and capabilities for the rider. These various combinations are highly appealing to the cyclist community.

Abstract: An apparatus controller for prompting a rider to be positioned on a vehicle in such a manner as to reduce lateral instability due to lateral acceleration of the vehicle. The apparatus has an input for receiving specification from the rider of a desired direction of travel, and indicating means for reflecting to the rider a propitious instantaneous body orientation to enhance stability in the face of lateral acceleration. The indicating may include a handlebar that is pivotable with respect to the vehicle and that is driven in response to vehicle turning.

Abstract: A two wheel vehicle is propelled by hand-grasped poles. A front wheel on a forward member and a rear wheel on a rearward member align along a longitudinal axis. The forward member pivots about a substantially vertical steering axis. A saddle and footholds support the rider and together with an accessory contact allow the rider to balance and steer the device. The rider's hands do not contact the vehicle but are used to propel the vehicle with the poles.

Abstract: A three wheeled scooter comprises a chassis having forward and aft ends with a front wheel non-pivotally mounted to the forward end and a pair of rear wheels coaxially mounted to the aft end. The chassis defines a longitudinal axis and includes a support assembly and a handle assembly extending upwardly from the support assembly. The rear wheels are configured to be angularly yawable relative to the longitudinal axis between a neutral position and a yawed position. Steering of the scooter is thereby effectuated by angular yawing of the rear wheels relative to the longitudinal axis such as by asymmetric loading of one of opposing sides of the support assembly.

Abstract: A vehicle for infants includes a footboard, a front and rear chassis support fixed to it, wherein each chassis support supports at least one wheel, a steering bar which is connected to the front chassis support, and gripping at the upper portion of the steering bar. The vehicle furthermore includes a seat which is preferably fixed to the steering bar. The invention furthermore relates to a vehicle for infants with two front wheels and at least one, preferably two, rear wheels, wherein the vehicle includes a seat which is preferably fixed to a steering bar of the vehicle, and wherein the vehicle includes gripping at the steering bar which, however, does not function as handle bar, and wherein at least the front chassis support of the vehicle includes a steering mechanism which permits to steer the vehicle by ways of shifting of weight.

Abstract: A three wheeled scooter comprises a chassis having forward and aft ends with a front wheel non-pivotally mounted to the forward end and a pair of rear wheels coaxially mounted to the aft end. The chassis defines a longitudinal axis and includes a support assembly and a handle assembly extending upwardly from the support assembly. The rear wheels are configured to be angularly yawable relative to the longitudinal axis between a neutral position and a yawed position. Steering of the scooter is thereby effectuated by angular yawing of the rear wheels relative to the longitudinal axis such as by asymmetric loading of one of opposing sides of the support assembly.

Abstract: A three wheeled vehicle features a front frame, a seat thereon, a front wheel on the front frame, a rear frame, and a pair of wheels on the rear frame. A flexible joint exists between the front and rear frame sections ahead of the seat and rear wheels and behind the front wheel to enable relative pivoting of the front frame about a tiltable axis. A pair of link arms each have spherical joints with the front and rear frames at opposite sides thereof at a distance behind the flexible joint. A dynamic articulation axis intersects the flexible connection and an axis passing through the connections of the link arms to the front frame. The front frame is tiltable relative to the rear frame to shift the dynamic axis relative to either side from a default position positioning the front wheel in a straight orientation relative to the rear wheels.

Abstract: In a vehicle seat control system (10), before a vehicle (60) turns a curve ahead of the vehicle (60), a control circuit (28) determines lateral acceleration that is expected to occur to the vehicle (60) while the vehicle (60) is turning the curve, and in addition, determines whether a braking operation is performed by a driver before the vehicle (60) turns the curve. When the control circuit (28) determines that an estimation value of the lateral acceleration is greater than a reference value, and that a braking operation has been performed by the driver before the vehicle (60) turns the curve, movable side support portions (26) in a vehicle seat (12) are pivoted in the closing or bending direction.

Abstract: Disclosed herein is a steering apparatus. According to a self-steering apparatus of the present invention, an angle of wheels becomes tilted automatically depending on a slope of a frame in applications for forward two-wheeled vehicle or backward two-wheeled steering apparatus of bicycles, motorcycles, vehicles, and so forth. At the same time, a steering angle is also matched to the tilted direction.

Abstract: A two wheel steering bicycle with two steering controls and rider positioned facing an angle greater than zero and less than ninety degrees with respect to the direction of motion. A frame member connects the rear head tube to the front head tube. The rear fork can rotate within the rear head tube. A rear steering handle is connected to the rear fork. The front fork can rotate within the front head tube. A front steering handle is connected to the front fork. A seat tube member attaches to the frame member. A bicycle saddle is attached to the seat tube member in such a way as to position the rider facing an angle greater than zero and less than ninety degrees with respect to the longitudinal axis of the frame member.

Abstract: A vehicle including: a front wheel; two rear wheels; a seat configured to allow a rider to lean forward when the vehicle travels; and a frame that includes a front frame section and a rear frame section, the front frame section extending from the seat to at least an axis of rotation of the front wheel and connecting the seat to the front wheel, the rear frame section extending from the first frame section rearward and connecting the rear wheels to the first frame section, the frame sections being pivotably connected at a pivot point between the main wheel and the seat.

Abstract: A three wheeled scooter comprises a chassis having forward and aft ends with a front wheel non-pivotally mounted to the forward end and a pair of rear wheels coaxially mounted to the aft end. The chassis defines a longitudinal axis and includes a support assembly and a handle assembly extending upwardly from the support assembly. The rear wheels are configured to be angularly yawable relative to the longitudinal axis between a neutral position and a yawed position. Steering of the scooter is thereby effectuated by angular yawing of the rear wheels relative to the longitudinal axis such as by asymmetric loading of one of opposing sides of the support assembly.

Abstract: A recumbent tricycle pedicab consisting of a front frame and a rear frame pivotally interconnected in a manner which enables steering by leaning. The front frame supports, a single wheel, a pedal and drive mechanism, and a driver's seat, while the rear frame supports a fixed handlebar and a two-wheeled passenger/cargo cab. A cab frame supports side panels, a front to rear panel, a passenger seat at least one storage pouch, and signal lights. At least one window or panel which can be rolled down for protection of the passengers or rolled-up and secured to allow ventilation. The front to rear panel opens to allow entry. The pedicab also has a cargo and storage area behind the passenger seat and contents are secured using at least one cargo net attached to the cab frame. Decking on rear frame provides a floor for cab and entry area.

Abstract: A cycle with a mechanical advantage drive and leaning steering system comprises a frame with at least one wheel rotationally attached to the frame. A drive rim is attached to the wheel adjacent to the outer circumference of the wheel. A pulley is rotationally attached to the frame. A belt is trained around and engages both the pulley and the drive rim. Because the belt is positioned at the outer circumference of the wheel a mechanical advantage is created that significantly reduces the amount of force required on the belt to propel the cycle. The cycle may be steered via the rotation of the rider's body on a seat. This rotation translates to rotation of a front portion of the frame with respect to the a rear portion of the frame about a pivoting interface portion, thereby causing the cycle to turn.

Abstract: A pedalling vehicle includes a main body, two control handles, two drive links, and a transmission link. The main body includes a front frame a front wheel, a rear frame, two rotation devices, two rear wheels, two cranks, and two connecting members. The rotation devices are connected by the transmission link through connection of the connecting members so that the rotation devices are rotatable synchronously and the rear wheels are movable with the rotation devices synchronously. Thus, the two rear wheels are turned synchronously by connection of the transmission link so as to turn and change the travel direction of the pedalling vehicle exactly.

Abstract: A powered vehicle and method of operating is described for on and off-road use. The powered vehicle comprises a chassis and a first and second axle coupled to the chassis having at least one wheel coupled to the first axle and at least two wheels coupled to the second axle. The powered vehicle further comprises a movable seat configured to support a rider sitting down on the seat, and configured to move relative to the chassis in order to provide a steering mechanism for the powered vehicle. For example, the movable seat provides a mechanism for the rider to shift his or her weight relative to the chassis to cause the steering mechanism for the powered vehicle.

Abstract: An apparatus designed to allow a runner to run/jog with a baby jogger by allowing natural running arm movement through the use of a twin shock absorbing connector arm assembly being attached at one end to a baby jogger and the other to the waist of the jogger by means of a waist belt with pivots at either end of the arm assembly to allow for variation in size/height of jogger and operator.

Abstract: A three wheeled scooter comprises a chassis having forward and aft ends with a front wheel non-pivotally mounted to the forward end and a pair of rear wheels coaxially mounted to the aft end. The chassis defines a longitudinal axis and includes a support assembly and a handle assembly extending upwardly from the support assembly. The rear wheels are configured to be angularly yawable relative to the longitudinal axis between a neutral position and a yawed position. Steering of the scooter is thereby effectuated by angular yawing of the rear wheels relative to the longitudinal axis such as by asymmetric loading of one of opposing sides of the support assembly.

Abstract: A vehicle including: a front wheel; two rear wheels; a seat configured to allow a rider to lean forward when the vehicle travels; and a frame that includes a front frame section and a rear frame section, the front frame section extending from the seat to at least an axis of rotation of the front wheel and connecting the seat to the front wheel, the rear frame section extending from the first frame section rearward and connecting the rear wheels to the first frame section, the frame sections being pivotably connected at a pivot point between the main wheel and the seat.

Abstract: A pedalling vehicle includes a main body, two control handles, two drive links, and a transmission link. The main body includes a front frame a front wheel, a rear frame, two rotation devices, two rear wheels, two cranks, and two connecting members. The rotation devices are connected by the transmission link through connection of the connecting members so that the rotation devices are rotatable synchronously and the rear wheels are movable with the rotation devices synchronously. Thus, the two rear wheels are turned synchronously by connection of the transmission link so as to turn and change the travel direction of the pedalling vehicle exactly.

Abstract: The invention is a bicycle having adjustable orientation of the seat (6) and the pedals (4) with respect to the handle-bars (5). The bicycle comprising an x shaped frame comprised of a profile (31) and a rigid support member (32) that are rotatably connected to each other by a hollow pin (42). The rider of the bicycle can change the angle between the profile (31) and the rigid support member (32) to rotate about the hollow pin (42). The bicycle further comprises a seat (6), attached to the upper part of the rigid support member (32), a first toothed-wheel (33) attached to the frame (32) by means of a pin passing through the toothed-wheel (33) and the lower part of the rigid support member (32). The pin has a crank and pedal (4) attached to each of its ends. The bicycle also comprises a front gear and second toothed-wheel (7) attached to a pin that passes through the hollow pin (42) located between the seat (6) and the first toothed-wheel (33).

Abstract: A vehicle includes a load-bearing body having a front end and a rear end, at least one carrier supporting the body on a surface on which the vehicle is positioned, and a steering device. The steering device includes at least one wheel and at least one castor-type wheel attached to the body and tiltable about a longitudinal axis of the body. In use, the at least one wheel and the at least one castor-type wheel contact a support surface and the vehicle is steerable by tilting the at least one castor-type wheel and the at least one wheel about the longitudinal axis.

Abstract: An ambulation aid which has a support structure for the patient that both supports the patient's weight, and is movable laterally with respect to the frame to accommodate sideways hip movement of the patient's gait. The inventors have observed that a patient's hip will shift laterally as the patient steps forward and places weight on the forward stepping leg. This causes prior art ambulation aids to jerk sideways. The present invention overcomes this by providing a support structure which can move sideways without requiring the entire frame to move sideways. In one embodiment, the support structure slides in a track behind the patient, allowing lateral movement. In another embodiment, the support structure includes a belt which either slides through rollers behind the patient, or is attached but is flexible to allow hip movement, or is attached to a slider behind the patient.

Abstract: An electrical bicycle is constructed to include a front body unit, a rear body unit, and a pivot coupler unit coupled between the front body unit and the rear body unit for enabling the front body unit to be turned relative to the rear body unit to change the steering direction of the electrical bicycle when the rider of the electrical bicycle turned the body to change the center of gravity.

Abstract: A center support member connects the rear head tube to the front head tube. The rear wheel attaches to the rear fork extending upwards. The rear fork steerer column passes through the rear head tube and can rotate within the rear head tube by a bicycle bearing headset. A rear steering handle is connected to the rear fork steerer column. The rear steering handle is designed to contact the rider's lower arm and hand. The front wheel attaches to the front fork extending upwards. The front fork steerer column passes through the front head tube and can rotate within the front head tube by a bicycle bearing headset. A front steering handle is connected to the front fork steerer column. The front steering handle is designed to contact the rider's lower arm and hand. A rider support member attaches to the center support member extending downward.

Abstract: A hand cycle includes a frame and a seat which is pivotable relative to the frame about a longitudinally extending axis to effect steerage of the hand cycle.

Abstract: A three wheeled vehicle comprises a front subframe having a front wheel journaled thereto and a seat for a rider mounted thereon, and a rear subframe having a pair of rear wheels journaled thereto. The front subframe is journaled to the rear subframe at a kingpin axis, which defines a caster angle with respect to the vertical. The kingpin axis is spaced by a trail dimension from the rear axle axis. The caster angle and trail dimension, together with the wheelbase dimension between the front and rear axle axes and the track dimension across the rear wheels, are chosen cooperatively to define the desired handling characteristics of the vehicle.

Abstract: A waist-twisting leisure bike includes a front body frame, a rear body frame, and a lateral frame. The front body frame has a handle, a support rod, a front fork tube, a front fork base, a front fork and a front wheel. The rear body frame has a driving device, a seat and a rear wheel. The lateral frame consists of a first and a second lateral frame respectively connected to the front body frame and the rear body frame. The first and the second lateral frame are pivotally connected to each other. Then a rider can twist the waist for changing swaying angle of the first and the second lateral frame so as to change the moving direction of the bike. So the bike in the invention can move by pedaling but also be used for waist-twisting exercise as well.

Abstract: Three-wheeled vehicle with an adjustable leaning and steering mechanism, permitting operator-controlled wheel and body lean as the vehicle is making a turn. The vehicle (100) has a leaning main frame (20) that carries the pedals (21) and crank assembly (22), recumbent seat (30) and rear wheel (40). Towards the front of the vehicle (100), a perpendicular axle housing (42) mounted with pivotal collar (44) allows the main frame (20) to lean right or left. Axle housing (42) carries the cantilevered steering arms (46) and adjustable steering levers (48). An axle (56) runs through the axle housing (42) and a spindle (60) and control arm (58) is pivotally connected to each end of the axle (56). Wheels (70R and 70L) are mounted on each spindle (60). Swivel tie rods (72) connect the control arms (58) of both front wheels (70R and 70L) to the main frame (20) so that when the main frame (20) is leaned, all wheels (70R, 70L and 40) lean laterally, producing simultaneous wheel and body lean.

Abstract: A three-wheeled occupant propelled vehicle is described. A seat is centrally suspended on a longitudinal axis, so that by leaning from side to side, the occupant may impart a steering motion by way of linkages between the seat and the steered front wheels. Said longitudinal axis is disposed vertically above the center of mass of the body of the occupant, so that, by the force of gravity, the occupant tends to stay in a vertical position unless a leaning motion is imparted, and straight line directional control is thus maintained. Motive power is provided by hand-actuated reciprocating levers coupled by a linking means to a driven rear wheel. Power is applied in both the fore and aft strokes of said levers. One embodiment of the present invention includes a variable ratio drive.

Abstract: A hand cycle includes a frame and a seat which is pivotable relative to the frame about a longitudinally extending axis to effect steerage of the hand cycle.

Abstract: An arm-powered wheeled vehicle that supports a rider in a prone or kneeling position to use crank arms radially displaced by 180 degrees to influence rear propulsion. Using this rider positioning and crank system maximizes the relatively low power available from the human body. Further, providing two steering devices and a wide range of gears allows the use of this arm-powered vehicle for traveling over varied terrain with the greatest possible control and safety.

Abstract: A human-powered recumbent tricycle with an articulated frame that permits leaning of the single-wheeled front sub-frame (10) during turns. While the seat (20) and pedal crank (18) move the driver's body with the leaning front sub-frame (10), the two-wheeled rear sub-frame (71) carries the handlebar (90) for optimum driver control of vehicular orientation. Steering of the front wheel (16) is accomplished by two cables (60L, 60R) within housings (61L, 61R) that provide immunity from distortions caused by articulation (100) rotations during leaning. Front wheel (16) drive utilizes a universal joint hub (30) for continuous power drive and no chain (40, 50) twist throughout the full turning radius. High seat (20) height and narrow wheelspan of the two rear wheels (80L, 80R) provide for improved visibility and traffic penetration on congested urban streets. A low cargo rack (75) is provided such that carrying cargo lowers the overall center of gravity and increases vehicular stability.

Abstract: A tricycle has two non-steerable rear wheels connected to a rear frame structure, and a single steerable front wheel connected to a front frame structure. The front frame structure includes a horizontal tubular frame element extending underneath the rear frame structure for swingable connection to the rear frame structure, such that the front frame structure can lean away from a normal upright position centered between the rear wheels. During a turning maneuver the leaning capability is advantageous in maintaining the rear wheels in pressure contact with the road surface so as to enhance the stability of the tricycle. A manually-operated locking mechanism is provided for releasably locking the front frame structure in its normal upright centered position. The locking mechanism keeps the front frame structure in a stable mode when the person is mounting or dismounting the tricycle, and also when the tricycle is being driven at low speeds in which there is minimal danger of the tricycle tipping or overturning.

Abstract: A hand-powered vehicle with a device for positioning the crank arms so that the rider can easily adjust them for both vertical and horizontal movement and placement. A device for supporting the rider's legs and feet that combines both a leg support and footrest that can be adjusted forward and rearward relative to the front wheel to accommodate different rider leg lengths. A device for triangulating the frame behind the seat in order to increase frame rigidity between the crank arms and the seat back. A self tightening seat with fabric attached in such a manner that the rider's weight holds the seat frame attached to the frame of the cycle. A device for quickly removing and replacing the rear axle while maintaining proper toe in and toe out of the rear wheels. A device for lowering the structure of the frame below the axis of the front wheel for the purpose of lowering the center of gravity of the bike and rider.

Abstract: A user-propelled walking apparatus comprising a frame assembly having a pair of front wheels and a pair of rear wheels. The pair of front wheels are maintained substantially parallel to one another. An upper body and seat assembly having a seat and a movable torso support unit is mounted to the frame assembly. The movable torso support unit is allowed to rotate or pivot. The rotation or pivoting movement of the movable torso support unit is connected to a mechanical transmission for controlling steering which controls the direction of the front wheels. A gait guide system comprising a pair of independent gait guides attached to the frame assembly to limit the movement of the user's feet. Each of the gait guides includes an elongate rail pivotally connected to the frame assembly. A sleeve is slidably mounted on the elongate rail and a shoe bracket is pivotally connected to the sleeve.

Abstract: A tricycle has two non-steerable rear wheels and a single steerable front wheel. One of the rear wheels is driven by a chain-sprocket drive system that includes a drive sprocket mounted on a front frame and a driven sprocket mounted on a rear frame. The front frame is tiltable, or swingable, from an upright position to a leaning position to minimize the potential for turnover of the tricycle during turning maneuvers or riding on rough terrain. Special idler sprockets are provided for the drive chain, to keep the chain in mesh with the drive sprocket when the front frame is in a leaning position.

Abstract: A recumbent cycle with improved steering and drive assemblies is provided. The recumbent cycle is of the tricycle type having two rear wheels spaced-apart and rotatably supported on an axle and a single front wheel. A frame assembly, including a seat disposed in a recumbent position and fixed to a tubular frame, is pivotally attached to the axle, and includes a forward mount for rotatably supporting the front wheel. A pedal/crank drive is included for rotating the front wheel and, therefore, propel the cycle. A steering assembly is also provided for pivoting and tilting the frame assembly with respect to the rear axle. The frame and the seat tilt into the turn as the frame is pivoted relative to the rear axle. The front wheel being carried on the frame assembly, pivots along with the frame assembly to effectively point the front wheel in the intended direction of travel, and therefore steer the cycle.

Abstract: A human powered mechanism for propelling a wheeled land vehicle, a water vehicle (a boat or hydroplane) using either a water screw or a jet of water or an ultra-light aircraft with an air screw. The mechanism can utilize either arm or leg muscles or preferably, both arms and legs extending and retracting in a manner similar to walking or running as performed from a semi-recumbent position. Steering or other critical control is accomplished through another mechanism which is guided by the appropriate movement of the operator's head. The operators feet are placed on pedals which are attached to swinging members which pivot in a bearing at the upper end. The operator's hands grasp leverage arms which are cantilevered, the distal ends of which are attached to the same push-pull connecting rods as the above mentioned swinging members with foot pedals attached.

Abstract: A three-wheeled vehicle having a front body member carrying front wheel seat, hand pedals and leg supports pivotally connected to a rear body member carrying the rear wheels and handlebar. The front body member includes a seat for the operator and pedals to be operated by the rider's hands. The seat, pedals, front wheel and leg supports are maintained in a fixed relationship whereby pivoting of the front frame portion simultaneously pivots the seat, pedals, drive line and front wheel to maintain said fixed relationship while turning and supplying power to the front wheel. A stabilizing dampener between front and rear frame sections provides smooth steering and inhibits undesired, inadvertent, side to side movement of the rider's body and thereby repetitive back and forth turning of the vehicle.

Abstract: A positively steered racing wheelchair is disclosed which includes a frame support on a pair of large wheels and a positively steerable trailing wheel. A seat for the athlete is suspended from a central position of the frame and is configured such that the athlete sits in a very low position to improve stability and to advantageously place the leverage of the athlete's arms with respect to a pair of drive rings situated outboard the large wheels. Positive steering of the may be accomplished in various ways. One embodiment employs a laterally pivotal seat structure with actuating cables connected to the seat back such that pivotal motion of the seat, as the athlete leans into a turn, is communicated to the trailing wheel to effect steering. Another embodiment utilizes actuating cables attached to cuffs around the athlete's biceps such that the natural tendency to twist into a turn can be translated into steering forces.

Abstract: A skate bike including a frame; a spring seat saddle connected to an upper part of the frame; a wheel having a central axle connected to a lower part of the frame; a pair of pedals provided on either side of the wheel; a pair of supporting shafts pivotally provided on the frame at suitable position to define a support for feet of a passenger; and an auxiliary wheel set provided on the frame at a suitable position. The skate bike is effective as an unicycle and also effective as an ice scooter or a grass scooter when used in conjunction with a pair of ski poles.