Tyre
AssigneeSumitomo Rubber Industries, Ltd.
InventorMari Mishima
Life of this patent
Estimating the term…
Abstract
A tyre has a tread portion. The tread portion has a land region divided by a first edge and a second edge extending in a tyre circumferential direction. The land region is provided with a plurality of sipes each extending between the first edge and the second edge. The plurality of the sipes includes inclined sipes and bent sipes. Each of the bent sipes includes first inclined elements inclined in the first direction with respect to the tyre axial direction and a second inclined element inclined in a direction opposite to the first inclined elements with respect to the tyre axial direction. Each of the inclined sipes is configured to have a depth larger at a center portion thereof than at both end portions thereof. Each of the bent sipes is configured to have a depth smaller at a center portion thereof than at both end portions thereof.
Claims18
A tyre comprising a tread portion comprising a land region divided by
- a first edge extending in a tyre circumferential direction and
- a second edge extending in the tyre circumferential direction, wherein
- the land region is provided with a plurality of sipes each extending between the first edge and the second edge,
- the plurality of the sipes includes inclined sipes and bent sipes,
- each of the inclined sipes extends from the first edge to the second edge, while inclining in a first direction with respect to a tyre axial direction,
- each of the bent sipes extends from the first edge to the second edge, and consists of a pair of first inclined elements and a second inclined element connecting therebetween,
- the first inclined elements are inclined in the first direction with respect to the tyre axial direction whereas the second inclined element is inclined in a direction opposite to the first inclined elements with respect to the tyre axial direction,
- each of the inclined sipes is configured to have a depth larger at a center portion thereof than at both end portions thereof,
- each of the bent sipes is configured to have a depth smaller at a center portion thereof than at both end portions thereof,
- the land region is provided with first lateral grooves and second lateral grooves,
- each of the first lateral grooves extends from the first edge toward the second edge and terminates within the land region,
- each of the second lateral grooves extends from the second edge toward the first edge and terminates within the land region, and
- the first lateral grooves and the second lateral grooves are arranged alternately in the tyre circumferential direction, wherein
- each of the first lateral grooves extending from the first edge of the land region is arranged on an extended line of one of the first inclined elements extending from the second edge of the land region, and/or each of the second lateral grooves extending from the second edge of the land region is arranged on an extended line of one of the first inclined elements extending from the first edge of the land region,
- in each of the bent sipes, the end portions are formed by the first inclined elements and the center portion is formed by the second inclined element, and
- a length in the tyre axial direction of the second inclined element is in a range of from 110% to 135% of a length in the tyre axial direction of the center portion of each of the inclined sipes.
A tyre comprising a tread portion comprising a crown land region defined between a first edge extending in a tyre circumferential direction and a second edge extending in the tyre circumferential direction and a middle land region positioned between the first edge and a shoulder vertical groove extending in the tyre circumferential direction on a side opposite to the second edge of the first edge, wherein
- the crown land region is provided with a plurality of sipes each extending between the first edge and the second edge,
- the plurality of the sipes includes inclined sipes and bent sipes,
- the inclined sipes are inclined in a first direction with respect to a tyre axial direction,
- each of the bent sipes includes first inclined elements inclined in the first direction with respect to the tyre axial direction and a second inclined element inclined in a direction opposite to the first inclined elements with respect to the tyre axial direction,
- each of the inclined sipes is configured to have a depth larger at a center portion thereof than at both end portions thereof,
- each of the bent sipes is configured to have a depth smaller at a center portion thereof than at both end portions thereof,
- the middle land region is provided with a middle lateral groove including a first middle element, a second middle element, and a third middle element,
- the first middle element extends in the tyre axial direction from the shoulder vertical groove,
- the second middle element is connected with the first middle element and extends therefrom,
- the third middle element extends in the tyre circumferential direction from the second middle element, and
- a length in the tyre axial direction of the center portion of each of the inclined sipes is smaller than a length in the tyre axial direction of the center portion of each of the bent sipes.
A tyre comprising a tread portion comprising a land region divided by a first edge extending in a tyre circumferential direction and a second edge extending in the tyre circumferential direction, wherein
- the land region is provided with a plurality of sipes each extending between the first edge and the second edge,
- the plurality of the sipes includes inclined sipes and bent sipes,
- the inclined sipes are inclined in a first direction with respect to a tyre axial direction,
- each of the bent sipes includes first inclined elements inclined in the first direction with respect to the tyre axial direction and a second inclined element inclined in a direction opposite to the first inclined elements with respect to the tyre axial direction,
- each of the inclined sipes is configured to have a depth larger at a center portion thereof than at both end portions thereof,
- each of the bent sipes is configured to have a depth smaller at a center portion thereof than at both end portions thereof, and
- a length in the tyre axial direction of the center portion of each of the inclined sipes is smaller than a length in the tyre axial direction of the center portion of each of the bent sipes.
Dependencies are inferred from the claim text.