Bicycle frame and bicycle

Details Bicycle frame and bicycle Bicycle frame and bicycle

B - Operations, Transporting

62

K

280/39

B62K 19/00 (2006.01) B62D 57/00 (2006.01) B62K 19/12 (2006.01) B62K 19/22 (2006.01)

Patent

CA 1267432

ABSTRACT A bicycle frame includes a saddle stem and a head inter- connected by upper and lower bars and integrally cast in a lightweight metal or alloy, particularly magnesium. At least the lower bar , and preferably also the saddle stem , is cast in an open section which is subsequently closed by means of a second casting secured in the open section by adhesive and preferably also mechanically interlocked therewith. The mechanical interlocking is provided by interengaging elements arranged at an angle oblique to the length of the castings. The upper and lower bars are joined by a structural bridge linking them at a location between the head and the saddle stem . The lower bar joins the saddle stem at an intermediate point.

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