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US 6,578,836 B2Granted
Shock absorber for automobile
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsTomohiko Kogure, Tatsuo Suzuki, Shinji Seimiya
Life of this patent
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Abstract
A shock absorber for an automobile which exhibits a vibration damping effect in a wide range of a frequency, while suppressing generation of frictional noise. The shock absorber for the automobile has a buffer member interposed between parts. The buffer member has a laminated structure including a plurality of vibration damping layers each having a peak of loss tangent tanδ in a range of a frequency which is different from others and surface layers made of thermoplastic resin.
Claims4
A shock absorber for an automobile, comprising:
- a buffer member interposed between parts, wherein said buffer member has a laminated structure including a pair of surface layers made of thermoplastic resin and a plurality of vibration damping layers disposed between the pair of surface layers, each vibration damping layer having a peak of loss tangent tanδ in a frequency range different from remaining ones of the plurality of vibration damping layers, wherein said parts are a coil spring and a spring seat and an integer multiple of a fundamental frequency of natural vibration frequencies of the coil spring lies in the frequency range in which said peak of loss tangent tanδ of each vibration damping layer appears.
Dependencies are inferred from the claim text.