Bicycle frame

Details Bicycle frame Bicycle frame

1974-11-01

1976-06-29

Wood,, Jr.

Land vehicles

Wheeled

Occupant propelled type

B62K 304

Patent

active

039662306

ABSTRACT:
A bicycle frame of relatively large diameter tubing formed of a light weight, high strength metal tubing, such as titanium, is provided with integral stiffeners at the top of the seat tube, the bottom of the down tube and the top of the fork blades. In larger sizes of frames, stiffeners may also be included at the bottom of the seat tube and at the top of the down tube. The placement of stiffeners at these selected locations results in overall frame stiffness characteristics not previously considered achievable without substantial increase in the weight of the frame. As an additional feature, the enlarged diameter of the down tube is reduced at appropriate locations to enable standard gear shift lever and control cable fittings to be used.

REFERENCES:
patent: 1998994 (1935-04-01), Lewis
patent: 2443008 (1948-06-01), Kraeft, Jr.

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