Patent ID: 6109638
Filing Date: 2000-08-29
Classification: B62K

Abstract:
A bicycle frame member comprising:frame walls defining a substantially hollow, unitary frame member, at least a portion of said frame walls being comprised of:an exterior wall section;an interior wall section; and,an intermediate layer of reinforcing material sandwiched between said interior and exterior walls sections;said interior and exterior wall sections each being comprised of a plurality of overlaid layers of composite material, with each individual layer of said composite material being comprised of a multiplicity of unidirectional, small diameter carbon fibers of high modulus and high tensile strength embedded in a resin matrix, said layers being arranged so that the fibers of any one layer cross over the fibers in an adjacent layer; and,the intermediate layer of reinforcing material comprises a synthetic honeycomb material, different froms aid interior and exterior material, composed of wall segments forming a plurality of cell structures, said wall segments being substantially perpendicular to the unidirectional fibers in said interior and exterior wall sections of said frame member.