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Patent Searching and Data


Title:
RUN-FLAT TIRE
Document Type and Number:
WIPO Patent Application WO/2016/051649
Kind Code:
A1
Abstract:
A run-flat tire (1) is provided with a tread section (2), a pair of sidewall sections (3), a bead section (4), side-reinforcing rubber (5) having a crescent-shaped cross section, and a carcass (6) comprising a ply of radially arranged cords. When the tire (1) is incorporated into a rim and the internal pressure thereof is set to 250 kPa or more, the ratio SW/OD of the cross-sectional width SW and the outer diameter of the tire is 0.26 or less when the cross-sectional width SW of the tire (1) is less than 165 (mm), and the cross-sectional width SW and the outer diameter OD of the tire (1) satisfy the relational expression OD ≥ 2.135 × SW + 282.3 (mm) when the cross-sectional width SW of the tire (1) is 165 (mm) or more. The bead section (4) comprises a bead core (4a) and a bead filler on the outside of the bead core (4a) in the tire radial direction. The maximum length H1 of the side-reinforcing rubber (5) in the tire radial direction and the length H2 of the bead filler satisfy 1.8 ≤ H1/H2 ≤ 3.5.

Inventors:
KUWAYAMA ISAO (JP)
HATANAKA SHINTARO (JP)
Application Number:
PCT/JP2015/004200
Publication Date:
April 07, 2016
Filing Date:
August 21, 2015
Export Citation:
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Assignee:
BRIDGESTONE CORP (JP)
International Classes:
B60C17/00; B60C3/04
Foreign References:
JP2013063765A2013-04-11
JP2005247007A2005-09-15
Other References:
See also references of EP 3202597A4
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
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