Pneumatic tire and manufacturing method of the same
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United States of America Patent
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Oct 8, 2013
Grant Date -
Jun 21, 2012
app pub date -
Dec 13, 2011
filing date -
Dec 20, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A pneumatic tire has a conductive portion formed by a conductive rubber is provided in the tread rubber formed by a nonconductive rubber. The conductive portion has an outer skin portion and a projection portion. The outer skin portion is formed on a surface of the tread rubber, and extends to an inner side in a tire width direction from a side surface of the tread rubber so as to terminate at a position which goes beyond a contact end. The projection portion spirally extends from a position in an outer side than contact end so as to reach a position in an inner side in the tire width direction than the contact end, and protrudes to an inner side in a tire diametrical direction from the outer skin portion so as to terminate without reaching a bottom surface of the tread rubber.
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