Abstract: A pedal driven vehicle is provided wherein up and down movement of a pair of pedals is converted into rotary motion of a drive wheel to provide vehicle locomotion. A chain or belt connected at the ends thereof to the pedals is movable back and forth in opposite directions in response to the up and down movement of the pedals and a power transmission mechanism, driven by the chain or belt, converts the back and forth motion thereof into rotary motion used in providing rotation of the driven wheel.

Abstract: A skateboard has a frame (1) on which a petal (7b) is pivotably mounted. When the pedal (7b) is pressed down its movement is converted via a push rod (16), a crank (26) and a toothed segment (29) into a rotational movement which is transmitted to a gear train (2). The output pinion of the gear train (2) is fixedly connected to the shaft of the two drive rollers (4). The push rod (16), in each case via a ball-and-socket joint (19a, 19b), is connected to both the pedal (7b) and the toothed segment (29) so that the transmission of the drive force is ensured even during tilting of the pedal (7b) caused when riding around curves. This mechanically driveable skateboard has the same height as a conventional skateboard and enables relatively high speeds to be reached while retaining the diverse possibilities such as ease in negotiating curves and maneuverability.

Abstract: On the vehicle are mounted an actuation member, a force transmission unit and a drive element. Preferably, the actuation member is comprised of two levers, each of them being fixed to a metal cable each connected to a chain, the two chains actuating the wheels of a gear-box. The latter acts on the drive element which sets in motion the vehicle. A sliding seat enables to transmit the maximum of muscular power to both levers. One or a plurality of free wheels transform the reciprocating motion of the levers into a unidirectional motion for the drive element. With this vehicle, it is possible to optimally transform the muscular energy into driving power.

Abstract: A running exercise bicycle is ridden by a user who alternately pedals two pedals to drive two rotary wheels into unidirectional rotation via two sets of individual mechanical drive devices to make the exercise bicycle move forward in a zigzag or straight path. A clutch device can inter-connect the wheels for co-rotation so that the bicycle can be driven on a straight path.

Abstract: A wheelchair having a propulsion and speed change mechanism, the mechanism has a clutch with a cam clutch (21) and a cylindrical fly wheel (23) installed on a hub (24) of the shaft (25) of the main wheel of the chair. The clutch includes roller bearings (14), plate springs (22) and forward and backward regulating device (15). A matched union gear (20) is formed at the center of the cam clutch (21) and matched with a union gear (19) formed on a propulsion and speed change bar (12) so that the cam clutch (21) and the propulsion and speed change bar move as one body. The cam clutch (21) and the bar (12) are installed with a bearing (17) on the axle of the frame (13) of the wheelchair. A connecting rod (2) has one end connected to one of a plurality of holes (10) on the propulsion and speed change bar (12) with a fixing pin. The other end of the rod is connected to the hole (7) of the propulsion and speed change bar with a moveable pin (6).

Abstract: A scooter of an ordinary general shape but equipped with an improved mechanical drive for the rear wheel or wheels, which drive is comprised of a ratchet mechanism for driving the rear wheel, a stepping lever for transferring the stepping force of the rider to the ratchet mechanism and a retrieving means for raising the stepping lever to the orignal position as the stepping force is released therefrom; whereby, the scooter can be propelled by the intermittent force of the rider to advance forwardly.

Abstract: A pedal lever type bicycle includes a pedal lever having a front portion and a rear portion, with an intermediate pivot point located substantially above the center of the rear wheel, and to the rear of the front of the rear wheel. The rear portion of the pedal lever has a dog-leg configuration, with the slider, which is attached to the drive chain, being mounted on a straight section of the rear portion of the pedal lever which extends slightly above and to the rear of the rear wheel hub, so that the chain exerts a force to move the slider outwardly on the rear portion of the pedal lever when it is in the lower position, and in the opposite direction with it is raised. Changes of mechanical advantage of 3 or 4 to 1 are available with this configuration of the pedal lever. Further, the rear brake is mounted on the lower rear portion of the frame, to avoid interference with the pedal lever.

Abstract: A bicycle having pedal bars pivoted on the frame near the rear wheel, with a pedal sprocket positioned above the rear wheel. A connection member couples the rear end of each of the pedal bars to the pedal sprocket and further includes conversion mechanism whereby up and down movement of the push bars induces rotative movement of the pedal sprocket. Foot pedals are mounted on the front end of the pedal bars. Downward pressure by a rider on the foot pedals (alternately applied) forces upper movement of the connection members and corresponding rotation of the pedal sprocket for driving the bicycle.

Abstract: For a vehicle such as a bicycle having a frame and at least one drive wheel, a driving sprocket, and an endless chain connecting the sprocket to the drive wheel, an improved propelling mechanism having two longer than usual pedal arms pivotally mounted on either side of the frame for swinging movement over an arc of less than 180.degree., and a slip-clutch between each pedal arm and the driving sprocket. The mechanism is such as to positively raise one pedal arm as the other is depressed. Preferably, first and second arcuate toothed members are secured to the respective pedal arms, and a first gear meshes with the first toothed member. The first gear is fixedly mounted to a transverse rotary shaft on which is also fixedly mounted a second gear. The second gear meshes with a third gear which in turn meshes with the second toothed member.

Abstract: There is provided a vehicle which includes a frame, a steerable wheel mounted on the frame and at least one further wheel mounted for free rotation on the frame. A flywheel is mounted for rotation adjacent one of the wheels. The vehicle includes means for imparting rotation to the flywheel, and a clutch plate rotatably and coaxially mounted adjacent the same wheel to which the flywheel is adjacent. Speed-reduction means allows rotation of the flywheel to rotate the clutch plate at a faster rate than the flywheel, and a frictionless clutch is provided between the clutch plate and the adjacent wheel.

Abstract: A pedal driven vehicle such as a bicycle which employs oscillating levers instead of crank type pedals, and endless chain to which the two pedal levers are respectively connected, one to each run of the chain by pull and push rods to impart an oscillatory movement to said chain and in which the oscillating chain is connected to drive two shafts in opposite directions at any one time and means including one way drives connecting said shafts respectively to the drive wheel for propelling said vehicle. The vehicle also has means for simultaneously moving the connections between said pull and push rods and the oscillating levers respectively along the lengths of said levers in the same direction so as to change the effective leverage of said levers and to thus change the driving ratio imparted to the propelling wheel by the drive mechanism.

Abstract: A mechanism for a rider propelled vehicle having a frame and a ground engaging wheel mounted on it comprising two lever arms on opposite sides of frame, extending backwardly, with foot pedals on their extremities and mounted each on a cylindrical oscillating shaft on opposite sides of a drive wheel gear. When these lever arms are depressed by the rider they are spring biased upwards and set in motion the mechanism that via shafts and gears winds up a spiral spring mounted into a drum incorporated in the rear wheel of the vehicle. The spring unwinds on its outer end causing the drum to rotate forward and the drum to rotate the wheel journaled on it.