Pneumatic tire with specified tread thickness distribution and specified section width in relation to bead diameter
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United States of America Patent
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Feb 5, 2019
Grant Date -
Jun 2, 2016
app pub date -
Aug 4, 2014
filing date -
Aug 6, 2013
priority date (Note) -
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Abstract
A pneumatic tire includes a carcass extending between bead cores of bead portions through a tread portion. A tire section width Wt (unit: mm) in relation to a bead diameter Db (unit: inch) satisfies the following equations, Wt≤−0.7257×(Db)2+42.763×Db−339.67, and Wt≥−0.7257×(Db)2+48.568×Db−552.33. In a tread thickness distribution curve f(y) represented by equation f(y)=1−t(y)/t(0), when y=0.4, the value of f(y) is of from 0.03 to 0.06, and a rate of change of the value of f(y) increases to y=0.4 and decreases thereafter, where t(y) denotes a tread thickness at each tire axial position Py, and y represents a ratio of an axial distance from the tire equatorial plane, to the maximum-width L of the carcass.
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