Tire

Patent metadata

Field	Value
Publication number	US-2016288581-A1
Application number	US-201615066161-A
Country	US
Kind code	A1
Filing date	Mar 10, 2016
Priority date	Apr 3, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A tire includes a tread portion having an installing direction to a vehicle so as to have an outboard tread edge. The tread portion is provided with a plurality of first inclined grooves each having an inclination to a circumferential direction of the tire and extending from at least a tire equator to the outboard tread edge, a plurality of second inclined grooves each having an opposite inclination to the inclination of the first inclined grooves and extending from at least the tire equator toward the outboard tread edge, and a plurality of blocks separated by the first inclined grooves and the second inclined grooves. Each second inclined groove includes an outboard end that terminates at one of the first inclined grooves so that a plurality of substantially trapezoidal shoulder blocks are arranged along the outboard tread edge.

First claim

What is claimed is:

1 . A tire comprising:
a tread portion having an installing direction to a vehicle, the tread portion having an outboard tread edge and an inboard tread edge; the tread portion being provided with a plurality of first inclined grooves each having an inclination with respect to a circumferential direction of the tire and extending from at least a tire equator to the outboard tread edge, a plurality of second inclined grooves each having an opposite inclination to the inclination of the first inclined grooves and extending from at least the tire equator toward the outboard tread edge, and a plurality of blocks separated by the first inclined grooves and the second inclined grooves; and each second inclined groove comprising an outboard end that terminates at one of the first inclined grooves so that a plurality of substantially trapezoidal shoulder blocks are arranged along the outboard tread edge.

2 . The tire according to claim 1 ,
wherein the tread portion has a designated rotational direction, and the second inclined grooves are inclined forward in the rotational direction from the tire equator toward the outboard tread edge.

3 . The tire according to claim 2 ,
wherein each of the second inclined grooves extends in an arc shape that protrudes backwardly in the rotational direction.

4 . The tire according to claim 1 ,
wherein each of the first inclined grooves is inclined at an angle of from 30 to 45 degrees with respect to the circumferential direction of the tire.

5 . The tire according to claim 1 ,
wherein the tread portion, in order toward the inboard tread edge, further comprises a first blocks, a second block and a third block, and the first block, the second block and the third block satisfy the following relation:
S1<S2<S3,
where S 1 , S 2 and S 3 are top surface areas of the first block, the second block and the third block, respectively.

6 . The tire according to claim 1 ,
wherein in a development view of the tread portion, each of the second inclined grooves is curved in an arc shape having a radius of curvature, and the center of the curvature is located on the side of the inboard tread edge with respect to the tire equator.

7 . The tire according to claim 1 ,
wherein each of the second inclined grooves extends continuously and smoothly between the outboard end and an inboard end.

Assignees

• Sumitomo Rubber Ind

Inventors

• Nakano Keita

Classifications

• B60C2011/0358

  Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane · CPC title

• B60C2011/0313

  directional type · CPC title

• B60C2011/0334

  Stiffness · CPC title

• B60C2011/0339

  Grooves · CPC title

• B60C11/0302

  directional pattern, i.e. with main rolling direction · CPC title