Pneumatic tire

Patent metadata

Field	Value
Publication number	US-10315466-B2
Application number	US-201514887545-A
Country	US
Kind code	B2
Filing date	Oct 20, 2015
Priority date	Oct 20, 2014
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A pneumatic tire includes a side wall having a side surface and a roughened region formed on the side surface such that the roughened region is extending in circumferential direction. The roughened region includes lands and dimples formed between adjacent lands, the lands include first lands and second lands formed such that the first and second lands are alternately arrayed in the circumferential direction and the first and second lands are inclined relative to radial direction in opposite inclination directions, and the roughened region is formed such that when the tire is mounted on a normal rim and filled with air at normal inflation pressure, the roughened region has an outer periphery formed on radially inner side of position 30 mm away in radially inward direction from tire maximum-width position, and the roughened region has an inner periphery formed on radially outer side of radially outer edge of the rim.

First claim

What is claimed is:

1. A pneumatic tire, comprising:
a side wall having a side surface and a roughened region formed on the side surface such that the roughened region is extending in a circumferential direction of the pneumatic tire,
wherein the roughened region comprises a plurality of lands and a plurality of dimples formed between adjacent lands, the plurality of lands comprises a plurality of first lands and a plurality of second lands formed such that the first lands and the second lands are alternately arrayed in the circumferential direction, that the first lands and the second lands are inclined relative to a radial direction of the pneumatic tire in opposite inclination directions, that each of the first lands has an absolute value of an inclination angle which is set in a range of 10 degrees to 25 degrees, and that each of the second lands has an absolute value of an inclination angle which is set in a range of 10 degrees to 25 degrees, and the roughened region is formed such that when the pneumatic tire is mounted on a normal rim and is filled with air at a normal inflation pressure, the roughened region has an outer periphery formed on a radially inner side of a position 30 mm away in a radially inward direction from a tire maximum-width position, and the roughened region has an inner periphery formed on a radially outer side of a radially outer edge of the normal rim.

2. The pneumatic tire according to claim 1 , wherein each of the first lands has the absolute value of the inclination angle which is set in a range of 15 degrees to 25 degrees, and each of the second lands has the absolute value of the inclination angle which is set in a range of 15 degrees to 25 degrees.

3. The pneumatic tire according to claim 2 , wherein each of the first lands has the absolute value of the inclination angle which is set to be equal to the absolute value of the inclination angle of each of the second lands.

4. The pneumatic tire according to claim 3 , wherein the inner periphery of the roughened region is formed on the radially inner side of a position 20 mm away in a radially outward direction from the radially outer edge of the normal rim.

5. The pneumatic tire according to claim 2 , wherein the inner periphery of the roughened region is formed on the radially inner side of a position 20 mm away in a radially outward direction from the radially outer edge of the normal rim.

6. The pneumatic tire according to claim 1 , wherein each of the first lands has the absolute value of the inclination angle which is set to be equal to the absolute value of the inclination angle of each of the second lands.

7. The pneumatic tire according to claim 6 , wherein the inner periphery of the roughened region is formed on the radially inner side of a position 20 mm away in a radially outward direction from the radially outer edge of the normal rim.

8. The pneumatic tire according to claim 1 , wherein the inner periphery of the roughened region is formed on the radially inner side of a position 20 mm away in a radially outward direction from the radially outer edge of the normal rim.

9. The pneumatic tire according to claim 1 , wherein the plurality of lands and the plurality of dimples are formed such that the plurality of dimples is arrayed in a plurality of rows between the outer periphery and inner periphery of the roughened region.

10. The pneumatic tire according to claim 1 , wherein the plurality of lands and the plurality of dimples are formed such that the plurality of dimples is arrayed in a plurality of rows partitioned by a land extending in the circumferential direction between the outer periphery and inner periphery of the roughened region and comprises a plurality of large dimples and a plurality of small dimples alternately arrayed to form each of the rows.

11. The pneumatic tire according to claim 1 , wherein the plurality of lands and the plurality of dimples are formed such that the plurality of dimples is arrayed in a plurality of rows partitioned by a land extending in the circumferential direction between the outer periphery and inner periphery of the roughened region and comprises a plurality of large dimples and a plurality of small dimples alternately arrayed to form each of the rows such that each of the large dimples has an isosceles trapezoidal shape and that each of the small dimples has an isosceles trapezoidal shape.

12. A pneumatic tire, comprising:
a side wall having a side surface and a roughened region formed on the side surface such that the roughened region is extending in a circumferential direction of the pneumatic tire,
wherein the roughened region comprises a plurality of lands and a plurality of dimples formed between adjacent lands, the plurality of lands comprises a plurality of first lands and a plurality of second lands formed such that the first lands and the second lands are alternately arrayed in the circumferential direction and that the first lands and the second lands are inclined relative to a radial direction of the pneumatic tire in opposite inclination directions, and the plurality of lands and the plurality of dimples are formed such that the plurality of dimples is arrayed in a plurality of rows partitioned by a land extending in the circumferential direction between an outer periphery and an inner periphery of the roughened region and comprises a plurality of large dimples and a plurality of small dimples alternately arrayed to form each of the rows.

13. The pneumatic tire according to claim 12 , wherein each of the first lands has an absolute value of an inclination angle which is set in a range of 10 degrees to 30 degrees, and each of the second lands has an absolute value of an inclination angle which is set in a range of 10 degrees to 30 degrees.

14. The pneumatic tire according to claim 13 , wherein each of the first lands has the absolute value of the inclination angle which is set to be equal to the absolute value of the inclination angle of each of the second lands.

15. The pneumatic tire according to claim 14 , wherein the inner periphery of the roughened region is formed on the radially inner side of a position 20 mm away in a radially outward direction from the radially outer edge of the normal rim.

16. The pneumatic tire according to claim 13 , wherein the inner periphery of the roughened region is formed on the radially inner side of a position 20 mm away in a radially outward direction from the radially outer edge of the normal rim.

17. The pneumatic tire according to claim 12 , wherein each of the first lands has an absolute value of an inclination angle which is set to be equal to an absolute value of an inclination angle of each of the second lands.

18. The pneumatic tire according to claim 17 , wherein the inner periphery of the roughened region is formed on the radially inner side of a position 20 mm away in a radially outward direction from the radially outer edge of the normal rim.

19. The pneumatic tire according to claim 12 , wherein the inner periphery of the roughened region is formed on the radially inner side of a position 20 mm away in a radially outward direction from the radially outer edge of the normal rim.

20. The pneumatic tire according to claim 12 , wherein the plurality of lands and the plurality of dimples are formed such that each of the large dimples has an isosceles trapezoidal shape and each of the small dimples has an isosceles trapezoidal shape.

Assignees

• Sumitomo Rubber Ind

Inventors

• Yagyu Kentaro
• Yukawa Naoki
• Mitarai Yasuo
• Kuniyasu Yasuaki

Classifications

• B60C13/02 Primary

  Arrangement of grooves or ribs · CPC title