초록 ▼

Disclosed is an improved bicycle frame of composite materials and a method of molding generally hollow components and assemblies for such a bicycle frame. The entire bicycle frame may be one integrally united piece of molded composite materials, such as unidirectional structural fibers impregnated w

Disclosed is an improved bicycle frame of composite materials and a method of molding generally hollow components and assemblies for such a bicycle frame. The entire bicycle frame may be one integrally united piece of molded composite materials, such as unidirectional structural fibers impregnated with a heat curable synthetic resin. Layers of the composite material may be shaped to form an uncured frame shell. This shell is compressed against the surfaces of a mold by an internal pressing member, such as an inflatable bladder routed to the outside through a passageway passing through a modified bottom bracket sleeve or a modified head tube sleeve. The shell is then cured while under compression in the mold.

대표청구항 ▼

A bicycle frame comprising a generally hollow unitary frame component extending longitudinally between and connecting at least two of a steering support means for rotatably supporting a front fork assembly for carrying handle bars and a front wheel assembly, a seat support means for supporting a sea

A bicycle frame comprising a generally hollow unitary frame component extending longitudinally between and connecting at least two of a steering support means for rotatably supporting a front fork assembly for carrying handle bars and a front wheel assembly, a seat support means for supporting a seat assembly, a pedal support means for supporting a pedal assembly, and a rear wheel support means for supporting a rear wheel assembly; said generally hollow unitary frame component comprising at least two adjacent wall sections each of which comprises at least one molded layer of fibrous material impregnated with a synthetic resin, said adjacent wall sections being integrally united by at least one integrally uniting juncture comprising a pair of overlapping edges of said adjacent wall sections, said overlapping edges being integrally united together to provide sufficiently intimate contact between the fibrous material of one of said overlapping edges and the fibrous material of the other of said overlapping edges for stress loadings to be transferred from fiber to fiber across said juncture, and said juncture thereby providing a substantially continuous wall of said resin impregnated fibrous material around an interior cavity of said generally hollow unitary frame component.