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Title:
RUN-FLAT TIRE
Document Type and Number:
WIPO Patent Application WO/2016/051650
Kind Code:
A1
Abstract:
A run-flat tire (1) is provided with a tread section (2), a sidewall section (3), a bead section (4), side-reinforcing rubber (5) having a crescent-shaped cross section, and a carcass (6). 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 OD of the tire (1) 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. When the maximum length of the side-reinforcing rubber (5) in the radial direction of the tire (1) in a cross-section of said tire (1) in the width direction thereof while in a reference state in which the tire (1) is incorporated into a rim, filled to a predetermined internal pressure, and does not have a load thereon is denoted by H1, the relational expression 10 (mm) ≤ (SW/OD) × H1 ≤ 20 (mm) is satisfied.

Inventors:
KUWAYAMA, Isao (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
HATANAKA, Shintaro (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
Application Number:
JP2015/004207
Publication Date:
April 07, 2016
Filing Date:
August 21, 2015
Export Citation:
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Assignee:
BRIDGESTONE CORPORATION (1-1 Kyobashi 3-chome, Chuo-ku Tokyo, 40, 〒1048340, JP)
International Classes:
B60C17/00; B60C3/04
Foreign References:
JP2013063765A2013-04-11
JP2005247007A2005-09-15
JP2013224054A2013-10-31
Other References:
See also references of EP 3202598A4
Attorney, Agent or Firm:
SUGIMURA, Kenji (36F Kasumigaseki Common Gate West, 3-2-1 Kasumigaseki, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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