Tubular bicycle frame
Patent 4941674 Issued on July 17, 1990. Estimated Expiration Date: 
January 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 149984 filed on 01/29/1988US Classes:280/281.1, Frames and running gear264/258Joining a plurality of superposed fibrous or textile layersExaminersPrimary: Hill, Mitchell J.Attorney, Agent or FirmForeign Patent References
International ClassesB62K 003/02B62K 019/02 AbstractA bicycle frame of streamlined and aerodynamically shaped tubular members has the form of two open triangles with a common side. The entire frame may be formed as one continuous unit with a plurality of hollow junctions each common to two or more members for supporting a front wheel assembly, a pedal and chain wheels assembly, a seat assembly and a rear wheel assembly. The frame may be covered or visually open from the side. The tubular seat column member has a rear wall which is curved longitudinally with a radius that follows the circumference of the rear tire. The longitudinally curved rear wall also is concave in transverse cross-section to follow the transverse shape of the outer surface of the tire. One or more of the tubular frame members, including a pair of rear seat stays and a pair of rear chain stays may have non-circular aerodynamic shapes in transverse cross-section.Other References
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