PNEUMATIC TIRE - YOKOHAMA RUBBER CO LTD

Title:

PNEUMATIC TIRE

Document Type and Number:

WIPO Patent Application WO/2018/047764

Kind Code:

A1

Abstract:

Provided is a pneumatic tire in which, by devising a sipe chamfer shape, it is possible to achieve both improvement in steering stability performance on dry road surfaces and improvement in steering stability performance on wet road surfaces. A sipe 11 has, on each of a tread-in side edge 11A and a kick-out side edge 11B, a chamfer section 12 and a non-chamfer region 13 in which other chamfer sections are not present. The maximum depth y (mm) of the chamfer sections 12 is shallower than the maximum depth x (mm) of the sipe 11, and the sipe width W of the sipe 11 is substantially constant. In a cross-sectional view perpendicular to a lengthwise direction of the sipe 11, at least one chamfer section 12 has an outline OL that becomes more convex toward the outside in a tire radial direction than a chamfer reference line RL connecting end sections of the chamfer section 12, and the cross-sectional area a of a chamfer region Ra that is surrounded by the outline OL, the sipe, and a tread surface of a tread section 1 is less than the cross-sectional area b of a reference region Rb that is surrounded by the chamfer reference line RL, the sipe 11, and the tread surface.

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Inventors:

SHINZAWA TATSURO (JP)
SHIRAISHI TAKAYUKI (JP)
KOUDA HIRAKU (JP)
UEMURA TAKANORI (JP)

Application Number:

PCT/JP2017/031779

Publication Date:

March 15, 2018

Filing Date:

September 04, 2017

Export Citation:

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Assignee:

YOKOHAMA RUBBER CO LTD (JP)

International Classes:

B60C11/12; B60C5/00; B60C11/03

Domestic Patent References:

WO2016125814A1	2016-08-11
WO2017141651A1	2017-08-24

Foreign References:

JP2013035345A	2013-02-21
JP2003205710A	2003-07-22
JP2008247336A	2008-10-16