Pneumatic tire

Patent metadata

Field	Value
Publication number	US-9796217-B2
Application number	US-201514669883-A
Country	US
Kind code	B2
Filing date	Mar 26, 2015
Priority date	Apr 25, 2014
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

The pneumatic tire has main grooves; land portions which are sectioned by the main grooves; paired notches which face to each other as well as being open to a tread surface; the notches being concave portions which are formed in side surfaces of two land portions which are adjacent across the main grooves; tie bars which protrudes at a predetermined height from groove bottoms of the main grooves and connect between the paired notches; and dimples which are provided in the middle in a width direction of the tie bars. The dimples are arranged at least in a notch internal region which is surrounded by wall surfaces of the notches among the tie bars.

First claim

What is claimed is:

1. A pneumatic tire having main grooves which extend in a tire peripheral direction, and land portions which are sectioned by the main grooves, in a tread portion, the pneumatic tire comprising:
paired notches which face to each other as well as being open to a tread surface, the notches being concave portions which are formed in side surfaces of two land portions which are adjacent across the main grooves;
tie bars which protrudes at a predetermined height from groove bottoms of the main grooves and connect between the paired notches; and
dimples which are provided in the middle in a width direction of the tie bars,
wherein the dimples are arranged at least in a notch internal region which is surrounded by wall surfaces of the notches among the tie bars, and
wherein the dimples are arranged away from the wall surfaces in a concave side of the notches among the wall surfaces constructing the notches.

2. The pneumatic tire according to claim 1 , wherein the notches and the tie bars are provided only at one position per one land portion.

3. The pneumatic tire according to claim 1 , wherein the notches and the tie bars are formed in a middle region and the land portions are equally divided among three in the tire peripheral direction, and
wherein sipes extending in the tire width direction are formed in the tread surfaces of the land portions, and the sipes are arranged in correspondence to the notches so as to equally divide the tread surfaces of the land portions among three.

Assignees

• Toyo Tire & Rubber Co

Inventors

• Kuwano Shingo

Classifications

• B60C11/045

  the groove walls having a three-dimensional shape · CPC title

• B60C11/047

  the groove bottom comprising stone trapping protection elements, e.g. ribs · CPC title

• B60C2011/133

  comprising recesses · CPC title

• B60C11/1307

  with special features of the groove walls · CPC title

• B60C11/1369 Primary

  Tie bars for linking block elements and bridging the groove · CPC title