Title:
PNEUMATIC TIRE
Document Type and Number:
Japanese Patent JP3198063
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve cross rigidity of a tire, bead durability and comfortableness compatible to each other by forming bead apex in a multi layer structure to which two or more kind of rubber material which have different hardness are laminated in annual ring shape or spiral shape.
SOLUTION: This tire is constituted to have a bead apex 8 of two or more kind of rubber material of different hardness between a body part of a carcass and a return part. In this case, the bead apex 8 is formed as a multi layer structure 16 to which a rubber layer of S is laminated in annual ring shape or spiral shape extending from the center of the bead apex P to the outer peripheral surface of the bead apex in a tire tangential cross section and the number of laminated layer of the rubber layer from the center of the bead apex P to the outer periphery surface of the bead apex is 3 or more.
Inventors:
Kazuya Suzuki
Jumonji Nagayoshi
Jumonji Nagayoshi
Application Number:
JP35094696A
Publication Date:
August 13, 2001
Filing Date:
December 27, 1996
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
B60C15/06; (IPC1-7): B60C15/06
Domestic Patent References:
| JP8175130A | ||||
| JP5124408A | ||||
| JP7149117A | ||||
| JP3248903A |
Attorney, Agent or Firm:
Tadashi Naemura (1 person outside)
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