Bicycle frame of composite material, molds for obtaining such a frame and frame-molding method
AssigneeTime Sport International
InventorJean-Marc Gueugneaud
Life of this patent
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Abstract
A composite bicycle frame comprises a diagonal down tube connected via a bottom bracket to a saddle tube and two rear forks, back stays, and a cross-bar between the top of the saddle tube and the steering tube. The diagonal tube, saddle tube, and rear forks form a first sub-assembly which is molded in one piece, while the cross-bar, saddle joint and upper end of the steering tube form a second sub-assembly, also in one piece, and the two sub-assemblies are joined with adhesive.
Claims10
Bicycle frame of composite material comprising a diagonal down tube (1) connected by a bottom bracket crankset housing (2) to a seat tube (3) and to two chain stays (4) extending backward, diverging from the bottom bracket crankset housing, a seat stay (9) connecting the ends of the chain stays to a top part of the seat tube, and a longitudinal top tube (6) connecting the seat tube (3) to a steering bush (D) which provides the link between this longitudinal tube (6) and the top end of the diagonal down tube (1), characterized in that it comprises a first subassembly (A) molded as a single piece comprising at least the diagonal down tube (1), of the bottom bracket crankset housing (2), of the seat tube (3), of the two chain stays (4) and of the bottom part (5) of the steering bush, and a second subassembly (B) molded as a single piece comprising the longitudinal top tube (6), of a seat joint (7) and of the top part (8) of the steering bush (D), these two subassemblies (A, B) being joined together by bonding.
Dependencies are inferred from the claim text.