A skateboard for use on pavement, ice or snow using a single narrow-footprint wheel, ice-blade or ski-runner attached to each foot, thus requiring the rider to dynamically balance the board. The skateboard is capable of self-propulsion at considerable speed on the flat or uphill by using an undulating motion. It can also lean up to 30 degrees and has a steering circle of only two feet. The board's construction comprises a front footboard, a rear footboard, and a strut which connects the two footboards and resists bending and extension. Each footboard includes a footpad, an attachment (i.e. a wheel, blade or ski), and a pivot joint connecting to the strut. The axis of this joint is aligned perpendicular to the footpad which allows the rider to steer each footboard independently by torsionally rotating the lower leg.
Disclosed herein is a caster skate apparatus to be propelled in a direction changeable manner by use of rider's both feet. The apparatus comprises front and rear boards (20, 30) to support both feet thereon, first and second rollers (22, 23) mounted to the underside of the front board at front and rear locations by a predetermined distance, third and fourth rollers (32, 33) mounted to the underside of the rear board at front and rear locations by a predetermined distance, a flexible connector (52) having a predetermined length and connected at opposite ends thereof to the front and rear boards to allow the front and rear boards to independently move within a predetermined range. A rotating center of each of the first and third rollers is spaced apart from an axis, having a predetermined inclination angle with respect to undersides of the respective boards, by a predetermined distance.
A skateboard apparatus wherein a torsion bar containing an inner pipe, outer pipes and flexible, rubber inserts therebetween assist the user in determining the direction and speed of the skateboard. The torsion bar is connected to platforms on which the user places his feet, and the underside of said platforms contain casters which enable the skateboard and its user to move in linear or non-linear directions as desired with just one initial push from the ground.
A skateboard in accordance includes a footplate (1) having a lower surface, a front wheel and a rear wheel (3) arranged in a front end and a rear end of the lower surface respectively, wherein the wheels are universal, and the footplate includes a front plate (17) and a rear plate (18). The front plate and the rear plate are connected via a rotatable torsional mechanism, and a restriction element (4) is defined between each plate and the torsional mechanism for restricting the rotation range of the torsional mechanism.
A telescopic skateboard may include a pair of direction casters mounted for steering rotation on a twistable one piece skateboard. A center section may be made sufficiently narrower than outboard foot support areas so that the board may be twisted by a rider to add energy for rolling motion to wheels in the casters. The center section may also be made sufficiently resistant to bowing and twist so that the skateboard may be ridden as a conventional, non-flexible skateboard. The center section may include telescoping male and female portions and an extension control.
A flexible skateboard may include a pair of direction casters mounted for steering rotation a twistable one piece skateboard. A center section may be made sufficiently narrower than outboard foot support areas which may be twisted by a rider to add energy for rolling motion to wheels in the casters. The center section may also be made sufficiently resistant to twist so that the skateboard may be ridden as a conventional, non-flexible skateboard.
