Title:
PNEUMATIC RADIAL TIRE, AND METHOD OF PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2003/061991
Kind Code:
A1
Abstract:
With the pneumatic tire of the invention, the overall strength (KO) of a belt layer (20) peripherally of the tire per unit width at the tire equatorial plane position (PO) is set at a value greater than that of the overall strength of the belt layer (20) peripherally of the tire per unit width at a width position (P2) that is 2/3 of the maximum width of the belt layer with the tire equatorial plane (CL) as the center, thereby making it possible to suppress the amount of peripheral elongation of the tread rubber in the middle region of the tread and to suppress the radial growth of the tire during the filling of standard inner pressure and during high speed rotation while suppressing the amount of use of material for the belt layer (20). Suppression of the amount of peripheral elongation of the tread rubber results in decreasing the degree of stretching of the rubber, thus making it possible to increase the resistance of the tread to the sticking or the like of foreign objects in the tread and to suppress the growth of cracks even in the event that a foreign object sticks in the tread.
Inventors:
Yano, Takeshi c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Mori, Hiroyuki c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Nakamura, Masaaki c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Itai, Seiji c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Mori, Hiroyuki c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Nakamura, Masaaki c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Itai, Seiji c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Application Number:
PCT/JP2003/000661
Publication Date:
July 31, 2003
Filing Date:
January 24, 2003
Export Citation:
Assignee:
BRIDGESTONE CORPORATION (10-1, Kyobashi 1-chome Chuo-ku, Tokyo, 104-0031, JP)
Yano, Takeshi c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Mori, Hiroyuki c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Nakamura, Masaaki c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Itai, Seiji c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Yano, Takeshi c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Mori, Hiroyuki c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Nakamura, Masaaki c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
Itai, Seiji c/o BRIDGESTONE CORPORATION (10-1 Kyobashi 1-chom, Chuo-ku Tokyo, 104-0031, JP)
International Classes:
B29D30/10; B29D30/70; B60C3/00; B60C9/20; B60C9/22; B60C9/26; B60C9/28; B60C19/00; (IPC1-7): B60C9/18; B60C9/08; B60C9/20; B60C11/04; B29D30/16
Attorney, Agent or Firm:
Nakajima, Jun (TAIYO, NAKAJIMA & KATO Seventh Floor, HK-Shinjuku
Bldg., 3-17, Shinjuku 4-chom, Shinjuku-ku Tokyo, 160-0022, JP)