Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2021/111664
Kind Code:
A1
Abstract:
A pneumatic tire according to the present invention has, on a tread surface, a plurality of circumferential-direction main grooves that extend in a tire circumferential direction, and has, in a land part on the width-direction outermost side, a plurality of width-direction grooves that extend from a tread end to a tire-width-direction inner side, and a plurality of width-direction sipes that extend from the tire-width-direction inner side end of the width-direction grooves to the tire-width-direction inner side so as to be connected to the circumferential-direction main grooves. Each of the width-direction sipes has, on the sipe bottom side, a widening part of which the sipe width becomes larger than that on the tread surface side, and a rectangular rate of the wide-direction sipe is not less than 0.8. The width-direction sipe extends to be inclined at a first inclination angle with respect to a tire width direction in a plan view of the tread surface. In a radial-direction region where the widening part is located, the widening part has a portion that extends to be inclined at a second inclination angle less than the first inclination angle with respect to the tire width direction or extends in the tire width direction.
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Inventors:
YUMII KEITA (JP)
Application Number:
PCT/JP2020/024395
Publication Date:
June 10, 2021
Filing Date:
June 22, 2020
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
International Classes:
B60C11/00; B60C11/03; B60C11/12
Foreign References:
| JPH115414A | 1999-01-12 | |||
| JP2006347227A | 2006-12-28 | |||
| JP2001219718A | 2001-08-14 | |||
| JP2002264613A | 2002-09-18 | |||
| JP2011183952A | 2011-09-22 | |||
| JP2014097697A | 2014-05-29 |
Other References:
"YEAR BOOK", JAPAN AUTOMOBILE TYRE MANUFACTURERS ASSOCIATION (JATMA, article "STANDARDS MANUAL of the European Tyre and Rim Technological Organisation (ETRTO) in Europe or the Design Rim"
"STANDARDS MANUAL of the ETRTO"
"STANDARDS MANUAL of the ETRTO"
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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