Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2022/183376
Kind Code:
A1
Abstract:
In order to improve the durability of bead portions, a pneumatic tire (1) has: bead cores (21) formed by winding bead wires (28) into an annular shape, the tire meridian cross-section being in a polygonal shape; a carcass (6) spanned between bead portions (20) on two sides in the tire width direction and formed by carcass cords (6c) extending at the bead portions (20) along the inner side in the tire radial direction of the bead cores (21) from the inner side in the tire width direction of the bead cores (21), then turning around to the outer side in the tire width direction, and being covered by a covering rubber (6d); an inner organic fiber reinforcement layer (50) formed by organic fiber cords winding on the bead cores (21) and being covered by a covering rubber (52); and a rubber reinforcement layer (60) arranged between the inner organic fiber reinforcement layer (50) and the carcass (6) and covering at least the innermost vertexes of the bead cores (21) in the tire width direction, the shortest distance between the bead wires (28) and the carcass cords (6c) being 3 mm or more.
Inventors:
HONDA HIROAKI (JP)
WANG MINGQUAN (CN)
GAO FENG (CN)
WAN GUANGLIANG (CN)
LIU YOUJUN (CN)
WANG MINGQUAN (CN)
GAO FENG (CN)
WAN GUANGLIANG (CN)
LIU YOUJUN (CN)
Application Number:
PCT/CN2021/078720
Publication Date:
September 09, 2022
Filing Date:
March 02, 2021
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
SHANDONG XINGDA TYRE CO LTD (CN)
SHANDONG XINGDA TYRE CO LTD (CN)
International Classes:
B60C15/00; B60C9/00
Foreign References:
| CN101479115A | 2009-07-08 | |||
| CN101784402A | 2010-07-21 | |||
| CN103717415A | 2014-04-09 | |||
| JP2019107950A | 2019-07-04 | |||
| JP2018111433A | 2018-07-19 |
Attorney, Agent or Firm:
ZHONGZI LAW OFFICE (CN)
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