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Patent Searching and Data


Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2019/107253
Kind Code:
A1
Abstract:
In this pneumatic tire 1, the rubber occupancy rate in a closed region X is in the range of 15[%] or below. A bead core 11 has, in a cross-sectional view in the tire meridian direction, a prescribed wire arrangement structure obtained by arranging wire cross-sections of bead wires. There are defined: a tangent that is tangential, from the rim-fitting-surface side, to wire cross-sections that are on the innermost layer in the tire radius direction and on the innermost side and the outermost side in the tire width direction in the wire arrangement structure; and a tangent point of a tangent on the wire cross-section on the outermost side. The gauge Wh in the tire width direction from the tangent point to the rim fitting surface and the outside diameter φ of the bead wires have the relationship 2.0 ≤ Wh/φ ≤ 15.0. The radial height H2 of a contact part between a turnback part 132 and a main body part 131 of a carcass layer 13 has a relationship 0.80 ≤ H2/H1 ≤ 3.00 with respect to the radial height H1 of the bead core 11.

Inventors:
TANNO ATSUSHI (JP)
KODA HIRAKU (JP)
MATSUDA JUN (JP)
Application Number:
PCT/JP2018/043079
Publication Date:
June 06, 2019
Filing Date:
November 21, 2018
Export Citation:
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Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
B60C15/00; B60C15/04; B60C15/06
Foreign References:
JPH0732824A1995-02-03
JP2015020741A2015-02-02
JP2008149778A2008-07-03
JP2002301915A2002-10-15
JP2015217824A2015-12-07
JPH11321250A1999-11-24
JP2012162204A2012-08-30
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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