Vehicle tire having sipes
AssigneeSumitomo Rubber Industries, Ltd.
InventorWako Iwamura
Life of this patent
Estimating the term…
Abstract
A vehicle tire is provided in the tread portion with sipes capable of improving the rigidity of tread rubber, wherein each of the sipes comprises an radially outer part and radially inner parts, the radially outer part extends radially inwards from the tread face to a certain depth H and extends continuously in the longitudinal direction thereof, the radially inner parts extend radially inwards from the radially inner end of the radially outer part, the radially inner parts comprises at least one first inner part inclined towards one side of the radially outer part and at least two second inner parts inclined towards the other side of the radially outer part, and the first and second inner parts alternate with each other in the longitudinal direction of the sipe.
Claims15
A vehicle tire comprising a tread portion with a tread face, and sipes disposed in the tread portion,
- each of the sipes consisting of a radially outer part and radially inner parts,
- the radially outer part defined as extending radially inwards from the tread face to a certain depth H and extending continuously in the longitudinal direction of the sipe,
- said radially inner parts each extending radially inwards from the radially inner end of the radially outer part at said certain depth H,
- said radially inner parts being at least one first inner part and at least two second inner parts,
- said at least one first inner part each defined as inclined towards one side of the radially outer part (a) from the radially outer end thereof at said certain depth H to the radially inner end thereof or (b) from a position radially inwardly at a small distance from the radially outer end thereof to the radially inner end thereof and
- said at least two second inner parts each defined as inclined towards the other side of the radially outer part from the radially outer end thereof at said certain depth H to the radially inner end thereof,
- the first and second inner parts alternating with each other in the longitudinal direction, and gaps between the first and second inner parts in the longitudinal direction being at most 2 mm, wherein said at least one first inner part of one of said sipes overlaps said at least two second inner parts of an adjacent sipe when viewing a cross-section of the tread portion.
A vehicle tire comprising a tread portion with a tread face, and sipes disposed in the tread portion,
- each of the sipes consisting of a radially outer part and radially inner parts,
- the radially outer part defined as extending radially inwards from the tread face to a certain depth H and extending continuously in the longitudinal direction of the sipe,
- said radially inner parts each extending radially inwards from the radially inner end of the radially outer part at said certain depth H,
- said radially inner parts being at least one first inner part and at least two second inner parts,
- said at least one first inner part each defined as inclined at a first inclination angle towards one side of the radially outer part from a position radially inwardly at a small distance from the radially outer end thereof to the radially inner end thereof and
- said at least two second inner parts each defined as inclined at a second inclination angle towards the other side of the radially outer part from the radially outer end thereof at said certain depth H to the radially inner end thereof,
- the first and second inner parts alternating with each other in the longitudinal direction, and gaps between the first and second inner parts in the longitudinal direction being at most 2 mm, wherein
- said first and second inclination angles (alpha) are acute angles with respect to a center line (X) of the sipe and gradually decrease radially inwards to substantially 0 degrees at the bottom.
Dependencies are inferred from the claim text.