Patent ID: 6581950
Filing Date: 2003-06-24
Classification: B62K

Abstract:
A bicycle, includinga main frame having a bottom bracket, which is a generally cylindrical structure for holding a pedal crank assembly that rotates about an axis extending through the center of the generally cylindrical structure, the pedal crank assembly attached to at least one chain sprocket, and a rigid rear wheel suspension system attached to the main frame at a single pivot axis, wherein the rear wheel suspension system includes a seat stay and a chain stay, each stay having a forward end and a rearward end, wherein the rearward end of each stay is nonpivotably secured to a joint attached to an axle of a rear wheel; and a single tubular upright member having a first end and a second end, wherein the forward end of the seat stay is nonpivotably attached to the first end of the tubular upright member, and wherein the forward end of the chain stay is nonpivotably attached to the single tubular upright member at an area that is disposed between the first end and the second end of the tubular upright member, and that is disposed above the at least one chain sprocket, and the single tubular upright member is pivotably attached to the main frame of the bicycle.