Abstract: An apparatus including a frame; a drive wheel coupled to the frame; a first and second foot link, each including a foot receiving portion for receiving a user's foot; and a direct drive power transfer system coupled to the first and second foot links and the drive wheel such that when the foot links are operated by a user, the direct drive power transfer system applies propulsive force to the drive wheel without the use of a chain or belt.

Abstract: An apparatus including a frame; a drive wheel coupled to the frame; a first and a second foot link operably coupled to drive wheel to transfer power to said drive wheel so as to propel the apparatus, each including a foot receiving portion for receiving an operator's foot, a front end, and a rear end; and an adjustable stride length mechanism operable to change a stride length of an operator's foot positioned on the foot receiving portion of the foot link.

Abstract: The present invention discloses a rear-pedaling standing type bicycle structure having a driving means installed at a front end of a bicycle frame and proximate to a corresponding line of front and rear wheels, and pedals pivotally coupled to both lateral sides of the front end of the bicycle frame for up and down movements. The driving means can be driven up and down alternately by the left and right pedals, and a link wheel is provided for transmitting kinetic forces to the rear wheel to drive the bicycle, so that the bicycle can be operated and driven in a special unique way to achieve the effects of expanding the exercising range and giving more fun to the exercise and game.

Abstract: A scooter with auxiliary assembly comprises a frame, a steering rod pivoted on the frame, a front wheel pivoted on the steering rod, a drive assembly fixed on the frame, and rear wheels pivoted on the frame and driven by the drive assembly. At least one pedal is pivoted on the frame, an elastic body connected the pedal and the frame, and at least one transmission assembly actuated by the pedal to rotate the rear wheels; wherein, the scooter has an auxiliary assembly that includes at least one supporter extended from the frame and at least one auxiliary wheel pivotally coupled to the supporter; the auxiliary wheel gets away from the ground due to the rear wheels while laying the scooter on the ground and properly contacts with the ground when the scooter is slant aside in time of forwarding.

Abstract: An improved human-powered engine which is actuated by forward and rearward movement of the body to cause extension of a resilient member which serves to provide driving motion to a wheel, propeller or the like.

Abstract: A scooter having a rockable platform upon which the rider stands with both feet. The platform is attached by a chain to one-way sprocket wheels mounted to the scooter. rear wheel rotating the rear wheel to propel the scooter in a forward direction as the front end of the platform moves and as the rear end portion of the platform moves down. The scooter has a position to allow the user to place one foot on the ground and one foot on the platform to propel the same.

Abstract: A method of propelling a wheeled platform, which includes creating a source of energy upon a first change in orientation of the platform relative to an axle housing of the wheeled platform by rotating the platform around an axis approximately parallel to a longitudinal axis of the platform. The source of energy is stored and released to propel the wheeled platform.

Abstract: A bicycle that includes an elliptical pedaling motion is provided. The bicycle includes a frame, having a front wheel and a rear wheel, and a first and a second foot link guide track. A first and a second foot link, each including a foot platform and a guide track coupler that slideably couples each foot link to a respective foot link guide track and a crank assembly that is coupled to the first and second foot links and to a sprocket that is rotatably coupled to the frame. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.

Abstract: A motor-driven roller disc for multi-directional operation under the control of a user, with a multi-wheeled drive configuration with motorized direct-drive power-train to give a user the ability to move in any direction at any time, and to maintain control over steering and speed when in motion. The roller disc includes a platform having an array of radially-oriented wheels mounted around the underside perimeter, and a central pivot wheel mounted at the center of the underside. The central pivot wheel maintains a slightly higher clearance than the perimeter wheels, enabling the user to engage a desired perimeter wheel by shifting his/her weight towards it, thereby making contact with the ground. All of the perimeter wheels are connected to a common flexible/jointed axle that encircles the disc, the axle being driven by a battery-powered DC motor.

Abstract: An Ellipticycle features a conventional bicycle front wheel assembly which is joined by two parallel lengths of bicycle tubing to a cast aluminum gear case within which a multiple speed transmission is enclosed. A crank shaft extends out through bearings in the left and right side halves of the gear case at its forward end with a crank arm fixed on each end of the crank shaft. A pedal beam is rotatably mounted near its center on a spindle fixed in the end each crank arm. A cam roller bolted on each side of the gear case at its aft end engages a short length of steel angle riveted on the inside of each pedal beam providing a downward force to counter balance the weight of the rider on the cantilevered forward portion of the pedal beam. A length of aluminum tubing is bolted on each side of the gear case at its aft end and encloses a drive shaft which passes out through bearings in the gear case.

Abstract: The pedal drive mechanism comprises a pedal arm immovably affixed across the secant of a drive gear, with the drive gear and attached pedal arm rotating through a partial revolution during operation. The drive gear meshes with a smaller pinion gear installed concentrically on the drive wheel axle. The pedal arm extends generally upwardly in its initial position prior to actuation of the mechanism, with operation requiring a rearward and downward kick or push. This is a natural motion for the operator of a scooter type vehicle, and the downward force also transfers a greater force to the drive wheel(s) for better traction during starting and operation. A return spring rotates the pedal arm, drive gear, and pinion gear back to their original starting positions when pressure is released on the pedal, with a one-way clutch disengaging the pinion gear from the drive wheel(s) during the pedal return stroke.

Abstract: Enabled is to lighten the load on a rider and to make the rider senses a turning state at the turning time of a transverse two-wheeled vehicle. A transverse acceleration (a) at a turn controlling time is detected to make a next inclination control in accordance with the magnitude of the acceleration. (a) In the case of an acceleration (a)?a predetermined threshold (a0), the vehicle is left uninclined to prevent the vehicle body from being unnecessarily inclined and rocked against a small centrifugal force, thereby to improve the riding comfortableness. (b) In the case of the acceleration (a)>the threshold (a0), a riding portion is inclined such that the inclination angle ?1 may become the larger as the acceleration (a) becomes the higher. This can reduce the load on the rider against the centrifugal force.

Abstract: A stepping scooter includes a scooter body for supporting a rider, a moving system, a driving system and a steering lever. The moving system includes a driving wheel rotatable connected with the scooter body, a driven wheel coaxially aligned with the driving wheel and rotatable connected with the scooter body. The driving system includes a driving arrangement pivotally connected to the scooter body, and a transmission and speeding up arrangement engaged with the driving arrangement to convert a human power applied on the driving arrangement into a rotation power to drive the moving system. When the human power is applied on the driving arrangement, the driving wheel is rotated so as to drive the driven wheel to move forward. On the other hand, the transmission and speeding up arrangement is capable of increasing a transmission velocity twice to save a physical force for the rider at the same time.

Abstract: A vehicle with two or more wheels including at least one or more surfaces on which it is possible to position one's feet and to exert an alternate force by pushing the heel or the point of the foot on said one or more surfaces; and motion transmission means connected to said one or more surfaces and to said one or more wheels of the vehicle itself.

Abstract: A scooter propulsion mechanism includes a pedal secured to the upper surface of the platform and a rigid link pivotally connected from the pedal to the mechanism components mounted on the bottom surface of the platform. Approximately one-half of the propulsion mechanism is located at one side of the rear wheel, and the other one-half is located at the other side of the rear wheel. The mechanism in one embodiment includes a plurality of gear wheels to increase rotational speed, and in another embodiment a plurality of sprocket wheels joined by chain loops, in both cases to drive the rear wheel and propel the scooter. A slot in the platform allows the larger sprocket wheels or gear wheels to project upwardly therethrough, so that there is sufficient ground clearance for safe riding.

Abstract: A non-motorized foot board scooter including a frame, a front wheel and a rear wheel, a steering assembly, and a drive train. The drive train includes a kick arm that rotates the rear wheel when the kick arm is pushed backwards by the rider. The kick arm is centered with the rear wheel and a kick guard is located between the rear wheel and the kick arm. A first sprocket is mounted to the arm. The rear wheel has an associated second sprocket that is connected to the rear wheel via a clutch. A chain is mounted to the frame and extends around the first and second sprockets. The chain is routed such that as the arm is rotated the chain is drawn across the second sprocket thereby rotating the drive wheel.

Abstract: A mechanism for the conversion of a force applied in one direction to a rotational force. The rotational force may provide for movement in a second direction. The system utilizes mechanical parts and the movement of these parts to convert the directional force to a rotational force. The system can help to utilize unused forces to the benefit of a user reducing workload and/or increasing speed.

Abstract: This invention is a user-propelled riding toy. A platform on which a user stands is supported by at least two wheels; and a geartrain mounts to the wheels. The geartrain is adapted to receive a downward force from the pedals, and translate a portion of the downward force into a rotational force on the wheels. The geartrain also provides an upward return force acting on the pedal. The platform is propelled forward direction by the rotational force on the wheels. When one pedal is pressed down, the other pedal will be raised simultaneously.

Abstract: A propulsion device for use with skate equipment includes a frame having an upper end and a lower end, an engine, a single wheel and a hand grip. The engine is mounted substantially above the lower end of the frame. The single wheel is mounted at the lower end of the frame and operatively connected with the engine to be driven thereby. The hand grip is mounted on the frame above the engine and is angled upward away from the frame when the propulsion device is placed in its normal angle of use.

Abstract: An application for a device for human conveyance includes a front wheel and a rear wheel. The rear wheel interfaced to a sprocket through a ratchet drive system which allows forward rotation of the rear wheel in response to forward rotation of the sprocket and allows free backward rotation of the sprocket. A frame interfaces the front wheel to the rear wheel keeping the front wheel at a constant distance from the rear wheel. The front and rear wheels are rotatably interfaced to the frame. A front end of an arc-shaped spring is affixed to the frame in proximity to the front wheel and a rear end of the arc-shaped spring has a sprocket gear interfaced to the sprocket whereas depression of the arc-shaped spring pushes the rear-end of the arc-shaped spring in a rearward direction with respect to the rear wheel and the sprocket gear turns the sprocket in a forward rotational direction.

Abstract: An operator-propelled, four-wheel vehicle uses a treadmill to drive two rear wheels through a bicycle type derailleur and sprocket gear shifter which provides gear changing capability. The front wheels, each of which have disk brakes, are steered by an automotive type steering apparatus. A vertical extension from the steering mechanism at the front of the vehicle mounts a horizontal steering bar to provide steering control. The steering bar also mounts control grips and cables for the front disk brakes and clutch assembly, as well as the gear shifter. An automatic breaking system ensures that an unmanned vehicle will remain in place.

Abstract: A vehicle and in particular a scooter in which there is present a first and a second element separated from each other and movable relative to a base frame, the elements defining respective actuating surfaces disposed substantially in side by side relationship with each other with respect to a longitudinal extension axis of the vehicle; an alternated operation of the first and second movable elements (6, 7) allows a motion-transmitting unit (8) to convert the reciprocating motion into a rotatory motion imparted to one of the scooter wheels thereby causing advancing of the vehicle. The particular positioning and configuration of the movable elements (6, 7) allows a steady and efficient use of the scooter.

Abstract: A bicycle that includes an elliptical pedaling motion is provided. The bicycle includes a frame, having a front wheel and a rear wheel, and a first and a second foot link guide track. A first and a second foot link, each including a foot platform and a guide track coupler that slideably couples each foot link to a respective foot link guide track and a crank assembly that is coupled to the first and second foot links and to a sprocket that is rotatably coupled to the frame. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.

Abstract: The present invention relates to the drive assembly coupled with the pedal thereon the frame, and the transmission assemblies rotated by the drive assembly. Thereby to step on the pedal repeatedly rotates the transmission assemblies to make the wheel rotate in single direction. Therefore, the invention can first enhance the operating stability and then get the exercise effect while the user kicks the ground to propel the pedal scooter and steps on the pedal repeatedly.

Abstract: Disclosed is a pedal scooter for kids, adults, and physically challenged people who enjoy riding scooter for fun and exercise. The pedal scooter is light weight, simple in use, durable, and configured to be driven by two riders at the same time. The pedal scooter comprises: a platform; a seating arrangement coupled to the platform; a steering arrangement disposed on the platform, the steering arrangement enabling the pedal scooter to be maneuvered; and a drive mechanism configured to operationally propel the pedal scoter. The pedal scooter enables a first rider to sit on the seating arrangement, and propel the pedal scooter in a forward direction by operating the drive mechanism, and a second rider to stand on the platform and maneuver the pedal scooter in a desired direction using the steering arrangement.

Abstract: A body weight-activated scooter having a rear, vertical chassis section and at least one front steering wheel mounted on a front chassis section and at least one rear drive-wheel, the scooter provided with a pair of systems substantially in alignment with a vertical gravity line for transferring power to at least one rear drive-wheel, each of the pair of systems comprising: a treadle bearing most of the weight of a rider at a heelward end; a weight-vector wheel; a return tension means; and an over-running clutch drive connected to the at least one rear drive-wheel and linked to the weight-vector wheel via a linking means, the over-running clutch drive providing sustained forward thrust when the treadle is depressed by the weight of a rider on the heelward end and the scooter is operated.

Abstract: A training toy and exercise device. A large frame supports a rear wheel and a front wheel. The front wheel is mounted in sized openings in the frame and is controlled by a handle bar. There are no pedals, chains, cranks controlling the operation of the device. A user will sit on the seat and use the user's legs to propel oneself unless the user is coasting. Under those circumstances the user's legs will rest on pegs. The device will find its primary use as a toy for small children who have not yet learned to ride a bicycle. Using this device a child can learn to ride a bicycle and balance himself on a two wheeled vehicle without concern for falling since at anytime the child's legs readily reach the ground given the vehicle's small size and low center of gravity.

Abstract: A scooter device propelled by side to side movement of a user that includes a frame structure through which at least a front wheel is coupled to two direction biased rear wheels. The frame structure may have a foot placement platform that extends laterally between the two rear wheels. The platform may extend over half of the distance between the rear wheels and/or be substantially continuous for that distance. Various platform embodiments and frame structures, including rigid and flexible, are disclosed, among other aspects.

Abstract: A structure of a foot propelled scooter is described. Because foot propelled scooter is put into motion by using foot oscillation, thus creating an effect of exercise and frolic to the rider. The foot propelled scooter has a steering handle which is operatively coupled to a set of front wheels, the steering handle is rotatable in a steering column, a retractable bar is pivotally attached to the steering column, an adjustable rear bar is adjustably and pivotally attached to the retractable bar, a foot frame having a set of wheels disposed underneath is pivotally mounted on each end part of the adjustable rear bar. A foot brake controllable by a foot is mounted on retractable bar. The rider swings both feet alternately in a forward and a backward direction to make a pushing contact to put the scooter into forward motion.

Abstract: A wheel assembly is provided, particularly for use with a vehicle, for example a scooter or a bicycle and the like, for operation in both eccentric and concentric modes. The wheel rim of the assembly rotatably and concentrically supports a wheel hub thereon. An offset axle is supported on the wheel hub radially spaced from the central axis of the wheel for rotation with the wheel hub relative to the wheel rim about the central axis. The offset axle rotatably connects to the frame of the vehicle. A locking mechanism selectively engages the wheel hub for rotation with the wheel rim in the eccentric mode, while the rim rotates freely about the central axis relative to the rim in the concentric mode. In this arrangement, any variety of simple clutch mechanism between the hub and the rim is effective for converting between the eccentric and concentric modes of operation.

Abstract: A treadle scooter for providing mobility to a user. The treadle scooter includes a frame assembly comprising a front end and a rear end. A steering assembly is rotatably coupled to the front end of the frame assembly and is designed for being actuated for directing the frame assembly in a desired direction. A front wheel is rotatably coupled to the steering assembly. A rear wheel is rotatably coupled to the rear end of the frame assembly. A drive assembly is coupled to the frame assembly and operationally coupled to the rear wheel for rolling the rear wheel across the support surface when the drive assembly is actuated. A transition assembly is operationally coupled between the drive assembly and the rear wheel. The transition assembly is for rotating the rear wheel when the transition assembly is rotated by the drive assembly.

Abstract: This invention is a user-propelled riding toy. A platform on which a user stands is supported by a steering mechanism that transfers a directional force from the platform; and a geartrain mounts to the wheels. The geartrain is adapted to receive a downward force from the platform, and translate a portion of the downward force into a rotational force on the wheels. The geartrain also provides an upward return force acting on the platform, and translates a directional force into a lateral force acting on the wheels. The platform is propelled forward direction by the rotational force on the wheels. Lateral forces cause two sets of wheels to pivot in opposite directions, and thereby directionally steer the platform.

Abstract: A scooter assembly for providing a scooter that would allow a user to move forward by simply shifting their weight. The scooter assembly includes a frame. A pair of wheels is coupled to the frame for supporting the frame on the pair of wheels. The pair of wheels is a front wheel and a rear wheel. A steering assembly is operationally coupled to the front wheel to permit turning of the front wheel. A drive mechanism is operationally coupled to the rear wheel for rotating the rear wheel to propel the scooter in a forward direction.

Abstract: A pedal scooter comprises a frame carrying a steerable front ground wheel and at least one rear ground wheel. At least one reciprocating pedal is pivotally mounted to the frame about a pedal axis and has a foot engaging surface positioned rearward of the pedal axis. A flywheel is mounted for rotation on the frame. One-way drive connections between the reciprocating pedal and the flywheel and between the flywheel and the rear ground wheel are provided. Downward pivotal movement of the reciprocating pedal by application of the user's foot to the foot engaging surface causes rotation of the flywheel in a drive direction, which in turn causes rotation of the rear ground wheel in the drive direction. Upward pivotal return movement of the reciprocating pedal is possible without preventing continued rotation of the flywheel and the rear ground wheels in the drive direction.

Abstract: A scooter includes a main frame, a tread board, a oneway bearing, and a linkage. Thus, the user can tread the pedal of the tread board successively to move the scooter forward, and the user's two feet need not to leave the main frame of the scooter, thereby facilitating the user operating the scooter.

Abstract: This invention is a user-propelled riding toy. A platform on which a user stands is supported by a steering mechanism that transfers a directional force from the platform; and a geartrain mounts to the wheels. The geartrain is adapted to receive a downward force from the platform, and translate a portion of the downward force into a rotational force on the wheels. The geartrain also provides an upward return force acting on the platform, and translates a directional force into a lateral force acting on the wheels. The platform is propelled forward direction by the rotational force on the wheels. Lateral forces cause two sets of wheels to pivot in opposite directions, and thereby directionally steer the platform.

Abstract: A bicycle for providing stair-stepping exercise motion, recreation, and mode of transport comprising a frame that includes a unique triangular rear portion, a pair of wheels, one for the front, one for the back, a chain driven, teardrop-shaped propulsion system, left and right pedals having multiple positions between a horizontal and angular vertical upon which the operator rides, adjustable handle bars for steering, and a safety housing for covering the propulsion and wheel sprockets, chain, braking mechanism, and bike stand. In an alternate embodiment the pedals on each side may be made of telescopic members to provide reciprocal motion so that the forward end of the pedal does not move reciprocally. Also a terrain engaging frame extension is provided below the middle portion of the frame for engaging terrain objects to prevent the pedals from engaging the terrain during activation.

Abstract: This invention relates to a drive mechanism for a scooter or similar vehicle. A pair of opposed rotatable crank arms are mounted to a drive gear on the frame. Each crank arm is attached to a footboard that is itself rotatably mounted to the frame. The footboard is mounted further from the axis of the crank arms than the distance from the axis of the crank arms to the point at which they contact the footboards. Reciprocating downward pressure on each footboard drives rotation of the crank arms which in turn drive a wheel of the vehicle.

Abstract: Devices and Equipment for Biking upright can be applied practically to any operator-powered vehicle (bicycle, tricycle, tandem, scooter, etc.) with the aim of increasing its operating parameters.

Abstract: A compact scooter supported by a pair of wheels is propelled by the cyclic operation of a pair of stabilized pedals by a standing user with hands on a handlebar. The elongate pedals having curved ends are connected to a crank and rocker link for predetermined pedal angles configured to maintain heel contact during the cyclic operation. The feet are positioned on pedal extensions with the heels of the feet rearward of the crank pivots to develop superior crank torque imposed upon the wheels for faster speed and better startup acceleration. Stunt features are provided to perform wheelies, rail grinding and step maneuvers.

Abstract: A mechanized scooter includes a frame, having a front wheel and at least one rear wheel rotatably attached thereto. A pair of steps are rotatably mounted in the frame and linked to a drive train to drive the at least one rear wheel. The drive train may include a number of gears and a drive element connected to a rack, or drive chains and sprockets secured to the at least one rear wheel.

Abstract: A kinetic energy generating mechanism includes a driven mechanism having a transmission member wound around two driving members that are rotatably connected to two pivotal shafts fixedly connected to a vehicle at predetermined positions, a transmission mechanism having front and rear rotating shafts mounting on the vehicle, and two transmission members separately wound around two pairs of front and rear driving members that are engaged with two unidirectional-rotation control members provided on at least the rear rotating shaft, and two actuating mechanisms fixedly connected to the transmission members of the driven and the transmission mechanisms. By applying a rearward force to slide either of the two actuating mechanisms, two rear wheels of the vehicle connected to two ends of the rear rotating shaft could be rotated forward with largely reduced effort.

Abstract: A self-propelled vehicle which can be driven by waist-twisting of human body is disclosed. The vehicle (shown in FIG. 1 and FIG. 11) is like a scooter, but it has a round footboard. Player stands on this round footboard with his two hands gripping the handlebar, and then twists his waist with his heels and toes tilting to force each point of circumference of the footboard to ground on the resisting board in turn. The player's strength of waist-twisting causes circular motion. The circular motion is transmitted to the two driven wheels by the bevel gears to the horizontal axle then drives the driven wheels. In this way, the player's waist-twisting causes the vehicle runs.

Abstract: A kinetic energy generating mechanism includes a driving part, a transmission part, and a driven part. The driving part includes front and rear rollers separately mounted on a vehicle, and an actuating belt wound around the front and rear rollers. The transmission part is a transmission gear mounted to an end of the rear roller to rotate along with the same. The driven part is a driven gear mounted on a rear axle of the vehicle and meshing with the transmission gear, or may include front and rear driven gears wound around by a chain to mesh with the transmission part and mount on the rear axle of the vehicle, respectively. When a user walks or runs on the actuating belt, the latter rotates the front and the rear roller counterclockwise, and the driven part meshed with the transmission part is rotated clockwise to move the vehicle forward.

Abstract: A three-wheeled device (10) for pedal-powered riding, wherein the device (10) provides a substantial but not excessive riding challenge. The preferred device (10) broadly comprises three wheels (12); two shafts (14); and two pedals (16). The wheels (12) are oriented parallel to one another so as to rotate about a common axis. Each shaft extends between and couples (14) two of the wheels (12) in an offset manner. Bearings (26) may be provided to facilitate movement of the shafts relative to the wheels (12) by reducing friction therebetween. Each pedal (16) is coupled with a different one of the shafts (14). For added safety, the pedals (16) may include non-slip contact surfaces (30) and light reflectors (32). In use, a rider stands on the pedals (16) and applies force thereto, with the force being transferred via the shafts (14) to the wheels (12) which are thereby caused to roll.

Abstract: There is provided a shoe with a roller device suitable for use in walking as an ordinary shoe and for use in skating as an in-line roller skate, and comprising a body including a body part to receive the foot of a user and an sole integrally formed with the bottom of the body part and having a receiving groove in the vertical direction, a roller device including a housing placed inside the sole, a stopper provided in the housing to movably reciprocate back and forth, a first wheel assembly movably fixed to the front of the housing and fixed to maintain the state for use in the ordinary shoe or for use in the in-line skate by the stopper, and a second wheel assembly provided on the back of the housing, movably fixed in the direction confronting with the moving direction of the first wheel assembly, and fixed to maintain the state for use in the ordinary shoe or for use in the in-line skate by the stopper, and a switch provided on the side of the sole of the body with engaged with the stopper to control the mov

Abstract: A compact exercise scooter supported by a pair of wheels is propelled by the cyclic operation of a pair of stabilized pedals by a standing user with hands on a handlebar. The elongate pedals are connected to a crank and guide for predetermined pedal angles configured to maintain heel contact during the cyclic operation. The feet are positioned on pedal extensions with the heels of the feet rearward of the crank pivots to develop superior crank torque imposed upon the wheels for faster speed and better startup acceleration. A means of adjustment is provided to change the predetermined pedal angles.

Abstract: An upright step cycle comprises a two wheeled bicycle, with two non-aligned foot support members (10) attached eccentrically to each crank arm (12) at one end, and at the other end, free to slide up and down along a straight guide track (16), producing an elliptical pedalling profile. A means by which to vary the guide track inclination angle, in order to produce a wide range of pedalling motion profiles. At lower inclination angles of the guide track, the stepping motion may resemble cross country skiing. At higher angles, the stepping motion may simulate walking, jogging, running or climbing. The guide track angle may be varied manually by the rider as the bicycle is in motion, therefore dismounting from the vehicle is not required. A system of gears (28 and 29) similar to those found on a standard bicycle, provide speed to power drive ratio adjustability to the driving wheel (21). A removable seat or leaning pad may also be included in the design.

Abstract: This invention relates to a drive mechanism for a scooter or similar vehicle. A pair of opposed rotatable crank arms are mounted to a drive gear on the frame. Each crank arm is attached to a footboard that is itself rotatably mounted to the frame. The footboard is mounted further from the axis of the crank arms than the distance from the axis of the crank arms to the point at which they contact the footboards. Reciprocating downward pressure on each footboard drives rotation of the crank arms which in turn drive a wheel of the vehicle.

Abstract: A rolling foot-powered apparatus mounted for movement on rotatable rollers and including at least one upper movable assembly, a lower stationary assembly, and at least one motion-conversion mechanism or an alternatively retractable motion-conversion mechanism. The movable assembly, which is provided with mounted means for movement therewith, and the lower stationary assembly, are cooperatively associated one with another and with the assistance of the motion conversion mechanism or alternatively retractable motion-conversion mechanism are operative such that an oscillating motion of the movable assembly or alternatively a linear motion of the movable assembly is converted either to a continuous circular motion of the rotatable shaft or alternatively to the rotatable rollers for the purpose of imparting a continuous linear motion of the rolling foot-powered apparatus.

Abstract: A pant garment is formed of two front panels connected to each other to form a fly and crotch and connected to a bakc panel to form side seams and an inseam with an improvement in the stitching therein of a reenforcing fabric across said crotch and into an end portion of an inner fly.