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Patent Searching and Data


Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2019/171554
Kind Code:
A1
Abstract:
Provided is a pneumatic tire that can suppress uneven shoulder wear in a tread and improve ride comfort. Maximum ground contact lengths LA1, LB1, and LC1 and maximum ground contact widths WA1, WB1, and WC1, which are respectively obtained when a pneumatic tire filled with 230 kPa of air is grounded under the condition that loads respectively corresponding to 40%, 75%, and 100% of the maximum load carrying capacity are applied to the pneumatic tire, and outside ground contact lengths LA2, LB2, and LC2, which are respectively positioned at 40% of the maximum ground contact widths WA1, WB1, and WC1 from the tire central position outwardly in the tire width direction, satisfy the following relationships: 1.02 ≤ (LB2/LB1)/(LA2/LA1) ≤ 1.25 and 1.00 ≤ (LC2/LC1)/(LB2/LB1) ≤ 1.20. When a tread (1) is divided into a central region Xc having a width corresponding to 53% of the maximum ground contact width WB1 and outside regions Xs that are outside the central region Xc, the groove area Sc of the central region Xc and the groove areas Ss of the outside regions Xs satisfy the following relationship: 1.01 ≤ Sc/Ss ≤ 1.50.

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Inventors:
SHIBAI TAKASHI (JP)
Application Number:
PCT/JP2018/009071
Publication Date:
September 12, 2019
Filing Date:
March 08, 2018
Export Citation:
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Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
B60C11/00; B60C11/03
Foreign References:
JP2007182099A2007-07-19
JP2005053268A2005-03-03
JP2013091444A2013-05-16
JP2010126103A2010-06-10
JP2017001474A2017-01-05
JPH05131805A1993-05-28
JP2010058554A2010-03-18
JPH0971107A1997-03-18
JP2004224270A2004-08-12
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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