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US 5,685,525 AGranted
Carbon fiber reinforced resin coil spring
AssigneesToho Rayon Co., Ltd., Showa Corporation
InventorsTakeshi Oguri, Masanobu Wakita, Masahito Yamauchi, Toshio Hisano, Yoshiyuki Takezawa, Masahiro Arai
Life of this patent
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Abstract
In a carbon fiber reinforced resin coil spring the carbon fibers A,B are oriented at an angle of .+-.30.about..+-.60.degree. relative to the axis of the cord of the spring. Further, the ratio A/B of the amount of the fibers A oriented in the compression direction and the fibers B oriented in the tension direction lies within the range of; 1.1<A/B<4.0
Claims4
A carbon fiber reinforced resin coil spring comprising,
- a spirally wound cord formed of a resin and carbon fibers A and B disposed in the resin, said carbon fibers A and B being oriented at an angle of .+-.30.degree.-.+-.60.degree. relative to an axial direction of the cord, said carbon fibers A being oriented in a direction that compressive force is applied and said carbon fibers B being oriented in a direction that tensile force is applied, the ratio of amounts of carbon fibers A and B being 1.1<A/B<4.0 to thereby provide high shearing strength.
Dependencies are inferred from the claim text.