Patent ID: 7540518
Filing Date: 2009-06-02
Classification: B62J

Abstract:
1. A seat tube for a bicycle, comprising: an upright tube made of fiber reinforced material and having an inserting portion at a top thereof; a head made of fiber reinforced material and having an inside chamber and a sleeve portion at a bottom thereof; wherein the sleeve portion overlaps and is fixed to the inserting portion of the upright tube so that the inside chamber of the head communicates with an inside of the upright tube; wherein an inner tube is fixed over a junction formed by and inside of the overlapping upright tube and the head; wherein an outer wall of the inserting portion of the upright tube is a first taper face converging upward and inward toward an inner wall of the inserting portion; and wherein an inner wall of the sleeve portion of the head is a second taper face converging downward and outward toward an outer wall of the head and corresponding with the first taper face.