PNEUMATIC TIRE

WIPO Patent Application WO/2020/090362

A1

Provided is a pneumatic tire which makes it possible to improve bead section durability. The pneumatic tire is configured in a manner such that: a bead filler 6 is provided around the outer-periphery of a bead core 5; a wound end section 4e of a carcass layer 4 is positioned to the inside radially from a radially outside end section 6e of the bead filler 6; the wound end section 4e of the carcass layer 4 is separated from the main section of the carcass layer 4; a steel reinforcing layer 11 is positioned in each bead section 3; a sidewall rubber layer 12 is positioned so as to extend from a sidewall section 2 to the bead section 3; a rubber reinforcing support layer 14 is provided between the bead filler 6 and the sidewall rubber layer 12 so as to cover the wound end section 4e of the carcass layer 4 and the end section 11e of the steel reinforcing layer 11; the rubber reinforcing support layer 14 extends radially outward from at least a lateral position of the bead core 5 and contacts the main section of the carcass layer 4 at a position to the outside radially from the radially outside end section 6e of the bead filler 6; the 100% modulus KM100 of the rubber reinforcing support layer 14 is equal to or greater than 1.5 times the 100% modulus BFM100 of the bead filler 6 which is adjacent thereto, and also the 100% modulus SM100 of the sidewall rubber layer 12.

NISHIO KOJI (JP)

PCT/JP2019/039517

May 07, 2020

October 07, 2019

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YOKOHAMA RUBBER CO LTD (JP)

B60C15/06

WO2017110643A1

2017-06-29

JP6594509B1	2019-10-23
JP2016120832A	2016-07-07
JP2013035407A	2013-02-21
JP2013001223A	2013-01-07
JP2017114451A	2017-06-29
JPS59109406A	1984-06-25
JP2005178618A	2005-07-07

SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)

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