Abstract: A propelling scooter includes a chassis, a front wheel steerably attached to a front end of the chassis, a rear wheel rotatably attached to a rear end of the chassis and an elongated pedal disposed longitudinally above the chassis. The pedal has a backward end and a forward end. The pedal is pivotally connected to the chassis between the ends thereof and is adapted to sway relative to the chassis. A first shaft laterally extends through and is rotatably supported on the chassis. The scooter further includes a driving pulley securely mounted around the first shaft, a driven pulley securely attached to a center of the rear wheel, and a primary flexible drive piece reeved around the driving pulley and the driven pulley to transmit rotation from the first shaft to the rear wheel such that the scooter may move forward when the first shaft is rotated relative to the chassis in a correct direction.

Abstract: A propelling scooter includes a chassis, an upright head tube with a handle, a front wheel, and a rear wheel. An elongated pedal is disposed swingably on the chassis. A horizontal transverse first shaft is journalled on the chassis, and is connected fixedly to the pedal, thereby permitting rotation of the pedal about the first shaft. When the pedal is swung, a transmission gearing unit transfers rotation of the first shaft to a driving wheel, which in turn rotates the rear wheel via a flexible endless drive piece. As such, reciprocal rotation of the first shaft is converted into continuous unidirectional rotation of the rear wheel.

Abstract: A propelling scooter includes a chassis, an upright head tube with a handle, a front wheel, and a rear wheel. An elongated pedal is disposed swingably on the chassis. A horizontal transverse first shaft is journalled on the chassis, and is connected fixedly to the pedal, thereby permitting rotation of the pedal about the first shaft. When the pedal is swung, a transmission gearing unit transfers rotation of the first shaft to a driving wheel, which in turn rotates the rear wheel via a flexible endless drive piece. As such, reciprocal rotation of the first shaft is converted into continuous unidirectional rotation of the rear wheel.

Abstract: A steering bearing assembly includes a lower race disposed to an end of a head tube through which a steerer tube extends, a handlebar stem mounted to the steerer tube, and an upper race disposed to the lower race with a ball bearing set rotatably received therebetween. The upper race has a neck portion extending upwardly therefrom which has at least two gaps defined longitudinally therein, a fastener securely mounted to the neck portion so as to position the steerer tube extending through the neck portion and the fastener is pushed downwardly by the handlebar stem.