Patent ID: 7581742

Claim:
A pedal scooter comprising: a frame, ground engaging rear and front wheels laying along longitudinal axis of the scooter and pivotally connected to opposite sides of the frame, a foldable handlebar connected to the front wheel for steering the scooter and a pedal connected to the rear wheel for driving the scooter, front portion of the pedal pivotally connected to the frame at a point forward of and above the rear wheel, wherein an elastic body is disposed at middle portion of the pedal between the pedal and the frame for elastically urging the pedal away from the frame, two transmission assemblies disposed on opposite sides of the rear wheel, each of the transmission assemblies comprises a curved gear rack, first, second and third sprocket wheels and a one way transmission bearing, wherein the gear racks are cojointly driven by the pedal; the gear rack being connected to a rear portion of the pedal and directly driving the first sprocket wheel, the third sprocket wheel non rotatably connected to the rear wheel and directly driven by the second sprocket wheel, the first and the second sprocket wheels having same rotational axis, the third sprocket wheel and the rear wheel having same rotational axis, and the radius of the second sprocket wheel is larger than each of the radiuses of the first and the third sprocket wheels, a one way transmission bearing disposed between the first and the second sprocket wheels for non rotatably engaging the first and the second sprocket wheels in response to driving operation of the pedal, the one way transmission bearing comprises plurality of recesses formed in the second sprocket wheel, plurality of rollers disposed in said recesses, and a retaining sheath having plurality of apertures for retaining the rollers.