Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2010/116710
Kind Code:
A1
Abstract:
Provided is a pneumatic tire having a tread pattern appropriately formed to dramatically improve on-ice performance and ensure performance balance with other performances.
Specifically provided is a pneumatic tire, wherein two or more block groups (GB) each comprising a plurality of blocks (3) which are independent of each other and defined by grooves are provided in a tread section (1), when the reference pitch length of a block (4) present in the block group (GBn) is PL (mm), the width of the block group is W (mm), the number of blocks present in a reference zone of the block group is a (pieces), the reference zone being defined by the reference pitch length (P) and the width (W), and the negative ratio in the reference zone is N (%), the densities (D) (pieces/mm2) of the number of blocks in the respective block groups given under the condition of a/{PL×W×(1-N/100)} are two or more different densities of the number of blocks, and the density of the number of blocks in at least one block group falls within the range of 0.004-0.03.
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Inventors:
OCHI NAOYA (JP)
Application Number:
PCT/JP2010/002491
Publication Date:
October 14, 2010
Filing Date:
April 05, 2010
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
OCHI NAOYA (JP)
OCHI NAOYA (JP)
International Classes:
B60C11/11; B60C5/00; B60C11/03
Domestic Patent References:
| WO2010032606A1 | 2010-03-25 |
Foreign References:
| JPH08318710A | 1996-12-03 | |||
| JPH082215A | 1996-01-09 | |||
| JPH07290908A | 1995-11-07 | |||
| JP2002178713A | 2002-06-26 | |||
| JP2002192914A | 2002-07-10 |
Other References:
See also references of EP 2418102A4
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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