Title:
空気入りタイヤ
Document Type and Number:
Japanese Patent JP5231349
Kind Code:
B2
Abstract:
The present invention provides a pneumatic tire that can exhibit high ice performance throughout a period of use of the tire, and can reduce a rejection rate without complicating production of the tire. The pneumatic tire includes: a plurality of land portions 4 partitioned by grooves 2 and 3 and formed in a tread surface 1a; and a sipe 5 formed in each of the land portions 4, wherein a plurality of first protrusions 7 are formed on only one of sipe inner wall surfaces 6 and 6 opposed to each other in the sipe 5, each of the first protrusions 7 continuing in a tire depth direction from the tread surface 1a to a sipe bottom 8 and protruding toward an opposite sipe inner wall surface, the first protrusion 7 is tapered toward the opposite sipe inner wall surface, a narrow portion 7a is provided between the tread surface 1a and the sipe bottom 8, and a second protrusion 9 protruding toward the opposite sipe inner wall surface is formed between narrow portions 7a of adjacent first protrusions.
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Inventors:
Yoshinori Asayama
Tetsuji Miyazaki
Tetsuji Miyazaki
Application Number:
JP2009162558A
Publication Date:
July 10, 2013
Filing Date:
July 09, 2009
Export Citation:
Assignee:
TOYO TIRE & RUBBER CO.,LTD.
International Classes:
B60C11/12; B60C11/04; B60C11/11
Domestic Patent References:
| JP10086612A | ||||
| JP2007276662A | ||||
| JP2009126293A | ||||
| JP2009073327A | ||||
| JP2002301910A | ||||
| JP2006168501A |
Attorney, Agent or Firm:
Yasushi Oshima
Shuzo Hinode
Seiji Goto
Junko Ohara
Shuzo Hinode
Seiji Goto
Junko Ohara