Patent ID: 6478322
Filing Date: 2002-11-12
Classification: B62M

Abstract:
A bicycle comprising:a frame constituting a chassis; a steering mechanism attached to the frame; a seat for seating a rider attached to the frame a pair of moving wheels rotably arranged at the frame on a front side and a rear side of the frame, said rear side moving wheel acting as a driving wheel; a sprocket arranged near a bottom bracket point in the frame; driving force transmitting means for transmitting rotating force of the sprocket to the rear side moving wheel; a pair of pedal levers having a phase difference of 180Â° with respect to each other to oscillate alternatively up and down; a crank lever arranged between the sprocket and the pedal lever so as to transmit force of the pedal lever to the sprocket; a sliding part for acting as an oscillating fulcrum point of the pedal lever; and a dust-resistant enclosure provided with the sliding part, wherein a sliding pin arranged at one end of said pedal lever is slid within said sliding part as said pedal lever is oscillated, wherein the force accompanied by the oscillation of said pedal lever is transmitted to said rear wheel through said sprocket, and wherein said frame extends between a bottom bracket point and the rear wheel, and includes a plate and a dust cover for covering said sliding part.