Bicycle frame

Details Bicycle frame Bicycle frame

B - Operations, Transporting

62

K

B62K 19/00 (2006.01) B62K 3/04 (2006.01) B62K 25/28 (2006.01)

Patent

CA 2083636

A bicycle frame has a triangular frame structure formed by bracket, seat and head lugs linked together by a seat tube, an upper tube and a lower tube. A chain stay is pivotally connected at a front end to the bracket lug and has a rear end fixed to a rear axle support to which a lower end of a rear fork member is pivotally connected. A triangular link is pivotally connected at a first point adjacent a first apex thereof to the seat lug and also pivotally connected at a second point adjacent a second apex to the upper end of the rear fork member. The triangular link is further pivotally connected at a third point ajacent a third apex to a free end of a cylinder rod of a shock absorbing assembly having a cylinder pivotally connected to the upper tube of the triangular frame structure, whereby the shock absorbing cylinder assembly is operative not only to absorb a shock on the rearwheel but also to provide a "progressive effect" to enhance running performance and suspension and assure a frame rigidity.

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