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US 11,142,025 B2Granted
Pneumatic tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorYoshifumi Koishikawa
Life of this patent
Estimating the term…
Abstract
A pneumatic tire comprises circumferential main grooves extending in the tire circumferential direction and land portions defined by the circumferential main grooves. The land portions are each provided with a plurality of groove units which are sets including a first groove, a second groove, and a third groove. The first groove, the second groove, the third groove are disposed without meeting one another, and radially extend at intervals from each other ranging from 90 degrees to 150 degrees. Additionally, the first groove is a lug groove with the groove width ranging from 1.5 mm to 4.0 mm and has a semi-closed structure, opening to the circumferential main groove or the tire ground contact edge at a first end portion and terminating within the land portion at a second end portion.
Claims32
A pneumatic tire, comprising:
- a plurality of circumferential main grooves extending in a tire circumferential direction;
- and
- a plurality of land portions defined by the circumferential main grooves;
- a center land portion of the plurality of land portions comprising a plurality of groove units each only composed of a first groove, a second groove, and a third groove;
- the first groove, the second groove, and the third groove being disposed without meeting one another and radially extending at intervals from each other ranging from 90 degrees to 150 degrees;
- the first groove being a lug groove with a groove width ranging from 1.5 mm to 4.0 mm and having a semi-closed structure, opening to one of the circumferential main grooves at a first end portion and terminating within the land portion at a second end portion;
- an inclination angle θ1 of the first groove with respect to the tire circumferential direction being in a range 30 degrees≤θ1≤60 degrees measured either clockwise or counter-clockwise with respect to the tire circumferential direction;
- an inclination angle θ2 of the second groove with respect to the tire circumferential direction is within a range 5 degrees≤θ2≤30 degrees;
- and
- the center land portion has no other groove between the groove units adjacent to each other in the tire circumferential direction.
7 more elements
A pneumatic tire, comprising:
- a plurality of circumferential main grooves extending in a tire circumferential direction;
- and
- a plurality of land portions defined by the circumferential main grooves;
- a center land portion of the plurality of land portions comprising a plurality of groove units each only composed of a first groove, a second groove, and a third groove;
- the first groove, the second groove, and the third groove being disposed without meeting one another and radially extending at intervals from each other ranging from 90 degrees to 150 degrees;
- the first groove being a lug groove with a groove width ranging from 1.5 mm to 4.0 mm and having a semi-closed structure, opening to one of the circumferential main grooves at a first end portion and terminating within the land portion at a second end portion;
- a groove width Wg2 of the second groove and a groove width Wg1 of the first groove and the groove width Wg3 of the third groove having relationships Wg2<Wg3 and Wg2<Wg1;
- and
- the center land portion has no other groove between the groove units adjacent to each other in the tire circumferential direction.
6 more elements
A pneumatic tire, comprising:
- a plurality of circumferential main grooves extending in a tire circumferential direction;
- and
- a plurality of land portions defined by the circumferential main grooves;
- a first land portion located on the tire ground contact edge and a second land portion directly adjacent to the first land portion of the plurality of land portions comprising a plurality of groove units each composed of a first groove, a second groove, and a third groove;
- the first groove, the second groove, and the third groove being disposed without meeting one another and radially extending at intervals from each other ranging from 90 degrees to 150 degrees;
- the first groove being a lug groove with a groove width ranging from 1.5 mm to 4.0 mm and having a semi-closed structure, opening to one of the circumferential main grooves or a tire ground contact edge at a first end portion and terminating within the land portion at a second end portion;
- an inclination angle θ1 of the first groove with respect to the tire circumferential direction being in a range 30 degrees≤θ1≤60 degrees measured either clockwise or counter-clockwise with respect to the tire circumferential direction;
- an inclination direction of the first grooves disposed in one of either the first land portion or the second land portion and an inclination direction of the first grooves disposed in an other land portion are opposite to one another in the tire circumferential direction;
- and
- the first groove of the second land portion opening at an outer edge portion of the second land portion in the tire width direction.
7 more elements
Dependencies are inferred from the claim text.