Claims
- 1. A pneumatic tire wherein a plurality of pitches different from each other in the length constitute the whole circumference of a tread surface and a period of said pitches begins with the shortest pitch and contains at least one longest pitch between said shortest pitch and the shortest pitch in the next period, and when the length of each period is defined as a distance from the center of the initial group of the shortest pitches of a period to the center of the initial group of the shortest pitches of the next period, the former half period length of each period is defined as a distance from the center of the initial group of the shortest pitches of the period to the center of the initial group of the longest pitches of the period, and the latter half period length is defined as a value obtained by subtracting the former half period length from the period length,
- in every period, the ratio of either of the two half period lengths to the total period length is 15 to 30%.
- 2. A pneumatic tire according to claim 1, wherein the number of kinds of pitch is 3 to 8.
- 3. A pneumatic tire according to claim 1, wherein the number of periods of pitch is 2 to 6.
- 4. A pneumatic tire for a passenger car wherein a plurality of pitches different from each other in the length constitute the whole circumference of a tread surface and a period of said pitches begins with the shortest pitch and contains at least one longest pitch between said shortest pitch and the shortest pitch in the next period, and when the length of each period is defined as a distance form the center of the initial group of the shortest pitches of a period to the center of the initial group of the shortest pitches of the next period, the former half period length of each period is defined as a distance from the center of the initial group of the shortest pitches of the period to the center of the initial group of the shortest pitches of the period to the center of the initial group of the longest pitches to the period, and the latter half period length is defined as a value obtained by subtracting the former half period length from the period length, in every period, the ratio of either of the two half period lengths to the total period length is 15 to 30%.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-112546 |
May 1988 |
JPX |
|
Parent Case Info
This application is a continuation-in-part application of application Ser. No. 348,926, filed on May 8, 1989, now abandoned.
Foreign Referenced Citations (1)
Number |
Date |
Country |
3630590 |
Mar 1988 |
DEX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
348926 |
May 1989 |
|