Title:
PNEUMATIC TIRE FOR HEAVY LOAD
Document Type and Number:
Japanese Patent JP3441575
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a heavy load pneumatic tire having excellent wearing resistance.
SOLUTION: A belt layer 7 composed of a plurality of belt plies arranged in the outer side of a carcass in its the radial direction and the inner part of a tread part is provided with a first belt ply 7A in the innermost side of the tire in its diameter direction and second and third belt plies 7B and 7C superposed in sequence in the outer side of the radial direction. The belt ply 7A is arranged in a manner that a low expansion cord 10 having expansion of 1 to 3% during breaking is inclined by an angle of over 40° to lower than 70° against a tire equator C. Further, the belt plies 7B and 7C are arranged in a manner that high expansion cords 11 each having expansion of 4 to 10% during breaking are inclined by angles of θ2 and θ3 of over 10° to lower than 20° equal to each other against the tire equator C and by superposing the high expansion cords 11 in a direction for intersecting each other for these second and third belt plies 7B and 7C, the low expansion cord 10 and the high expansion cords 11 are caused to intersect one another in a triangular form.
Inventors:
Shoji Kohno
Rie Miyawaki
Rie Miyawaki
Application Number:
JP28187895A
Publication Date:
September 02, 2003
Filing Date:
October 30, 1995
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
B60C9/18; B60C9/00; B60C9/20; B60C9/22; (IPC1-7): B60C9/20; B60C9/00; B60C9/18
Domestic Patent References:
| JP3262704A |
Attorney, Agent or Firm:
Tadashi Naemura (1 person outside)