Tire and tire mold
AssigneeBridgestone Corporation
InventorsYoshio KAJI, Ryunosuke MATSUYAMA, Shinsaku KATAYAMA
Life of this patent
Estimating the term…
Abstract
The projection portion 150 includes a straight portion 152 extended linearly in a predetermined direction, a first inclined portion 151 inclined to spread toward an outer side in the predetermined direction from one end of the straight portion 152, and a second inclined portion 153 inclined to spread toward an outer side in the predetermined direction from another end of the straight portion 152. A period defined by a length of the projection portion 150 in the predetermined direction is 0.8 times to 2.0 times as large as a sipe depth defined by a length of the sipe 100A between the wheel tread of a block 20A and a bottom of the sipe 100A.
Claims19
A tire comprising a sipe extended in a predetermined direction and formed on a wheel tread of a tread portion,
- wherein:
- in a tread surface view,
- the sipe includes a first straight sipe extended linearly in the predetermined direction, a second straight sipe extended linearly in the predetermined direction, and a projection portion formed between the first straight sipe and the second straight sipe to be projected in a crossing direction crossing the predetermined direction;
- the projection portion includes a straight portion extended linearly, a first inclined portion continued to one end of the straight portion and one end of the first straight sipe and inclined to spread toward an outer side in the predetermined direction from the one end of the straight portion, and a second inclined portion continued to another end of the straight portion and one end of the second straight sipe and inclined to spread toward an outer side in the predetermined direction from the another end of the straight portion;
- and
- a period defined by a length of the projection portion in the predetermined direction is 0.8 times to 2.0 times as large as a sipe depth defined by a length of the sipe between the wheel tread of the tread portion and a bottom of the sipe.
A tire comprising a sipe opened to a wheel tread of a tread portion,
- wherein:
- the sipe includes a first sipe formed at a side of the wheel tread, a second sipe located at an inner side in a tire radial direction with respect to the first sipe, and a bent portion communicated with an inner end in the tire radial direction of the first sipe and an outer end in the tire radial direction of the second sipe, the bent portion being bent in a predetermined direction;
- and
- in a sipe extending direction view,
- a first sipe center line defined by a straight line passing the inner end in the tire radial direction of the first sipe and an outer end in the tire radial direction of the first sipe is inclined against the tire radial direction, and a second sipe center line defined by a straight line passing an inner end in the tire radial direction of the second sipe and the outer end in the tire radial direction of the second sipe is extended along the tire radial direction.
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A tire mold comprising a molding mold including a blade for molding a sipe extended in a predetermined direction on a wheel tread of a tread portion,
- wherein:
- the blade includes a first straight portion extended linearly in the predetermined direction, a second straight portion extended linearly in the predetermined direction, and a projection portion formed between the first straight portion and the second straight portion to be projected in a crossing direction crossing the predetermined direction;
- the projection portion includes a straight portion extended linearly in the predetermined direction, a first inclined portion continued to one end of the straight portion and one end of the first straight portion and inclined to spread toward an outer side in the predetermined direction from the one end of the straight portion, and a second inclined portion continued to another end of the straight portion and one end of the second straight portion and inclined to spread toward an outer side in the predetermined direction from the another end of the straight portion;
- and
- at least one of the first inclined portion and the second inclined portion includes a through hole penetrating the blade in a thickness direction of the blade.
Dependencies are inferred from the claim text.