Tire noise reduction device and pneumatic tire
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United States of America Patent
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Feb 5, 2013
Grant Date -
Jan 21, 2010
app pub date -
Sep 25, 2007
filing date -
Sep 26, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A tire noise reduction device and a pneumatic tire, in which tire vibration can be reduced while durability is maintained and tire noise is reduced. The tire noise reduction device includes two main sound absorbing members for changing the cross-sectional area of a cavity of a tire in the circumferential direction of the tire and two assistant sound absorbing members disposed between the two main sound absorbing members. Each of the sound absorbing members is formed of a porous material. Each main sound absorbing member includes a first sound absorbing part and a second sound absorbing part, where the second sound absorbing part has a density lower than that of the first sound absorbing part. Each assistant sound absorbing member has a density higher than that of the second sound absorbing part and a thickness less than that of the main sound absorbing member.
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