Pneumatic tire

Patent metadata

Field	Value
Publication number	US-2017129286-A1
Application number	US-201615340388-A
Country	US
Kind code	A1
Filing date	Nov 1, 2016
Priority date	Nov 5, 2015
Publication date	May 11, 2017
Grant date	—

Abstract

In a tire in which thickness from a boundary B between a cap layer 22 and a base layer 21 to a tire reference contour line L is thicker in a center land section 30 than in a shoulder land section 40 , the center land section 30 and the shoulder land section 40 project to an outer side further than the tire reference contour line L, a thickness of the cap layer 22 in a projecting state is thicker in the center land section 30 than in the shoulder land section 40 , and the shoulder land section 40 projects the most in a region A between a central position of the shoulder land section 40 in a tire width direction and a position on a main groove side therefrom by ¼ of a length of the shoulder land section 40 in the tire width direction.

First claim

1 . A pneumatic tire in which a tread section includes: a base layer on an inner side in a tire radial direction; and a cap layer including a ground-contact surface on an outer side thereof in the tire radial direction, in which the tread section is partitioned by a main groove to at least include a center land section and a shoulder land section, and in which a thickness from a boundary between the cap layer and the base layer to a tire reference contour line is thicker in the center land section than in the shoulder land section, wherein
the center land section and the shoulder land section project to an outer side further than the tire reference contour line, a thickness of the cap layer in a projecting state is thicker in the center land section than in the shoulder land section, and a position where the shoulder land section projects the most exists in a region between a central position of the shoulder land section in a tire width direction and a position on the main groove side therefrom by ¼ of a length of the shoulder land section in the tire width direction.

2 . The pneumatic tire according to claim 1 , wherein
the shoulder land section has a larger ground-contact area than the center land section.

3 . The pneumatic tire according to claim 1 , wherein
a hardness of the cap layer is equal to or larger than 62°.

4 . The pneumatic tire according to claim 1 , wherein
the shoulder land section includes a slit that extends in the tire width direction, and a depth of the slit at the position where the shoulder section projects the most is shallower in the shoulder land section on a vehicle outer side than in that on a vehicle inner side.

5 . The pneumatic tire according to claim 1 , further comprising
a mediate land section between the center land section and the shoulder land section.

Assignees

• Toyo Tire & Rubber Co

Inventors

• Kawakami Kazuki

Classifications

• B60C2011/0025

  Modulus or tan delta · CPC title

• B60C11/1376

  Three dimensional block surfaces departing from the enveloping tread contour · CPC title

• B60C11/033

  by the void or net-to-gross ratios of the patterns · CPC title

• B60C11/04 Primary

  in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag (B60C11/12, B60C11/13 take precedence) · CPC title

• B60C2011/039

  provided at the shoulder portion · CPC title