Pneumatic tire with tread having cap portion, base portion and conductive portion
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United States of America Patent
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-
May 10, 2016
Grant Date -
Jan 31, 2013
app pub date -
Jul 9, 2012
filing date -
Jul 26, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A pneumatic tire has a tread rubber provided in an outer side of a carcass layer in a tread portion. the tread rubber has a cap portion which is formed by a non-conductive rubber and constructs a ground-contacting surface, a base portion which is provided in an inner side in the tire diametrical direction of the cap portion, and a conductive portion which is formed by a conductive rubber and extends in a thickness direction of the tread rubber so as to reach a bottom surface of the tread rubber from the ground-contacting surface. A thickness of the conductive portion is made relatively large in a center portion in the thickness direction of the tread rubber, and the thickness of the conductive portion is made relatively small in both end portions in the thickness direction of the tread rubber.
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