TIRE
First Claim
1. A tire comprising:
- a plurality of rib-shaped land portions which extend in a tire circumferential direction; and
a circumferential groove positioned between the land portions and extending in the tire circumferential direction, whereinthe circumferential groove is formed with an intra-groove groove recessed farther inward in a tire radial direction than the circumferential groove with a groove bottom of the circumferential groove being an upper end of the intra-groove groove, the intra-groove groove includes;
a high-angle groove section in which an angle formed between a straight line perpendicular to a tire equator line and the intra-groove groove is equal to or more than a predetermined angle, anda low-angle groove section in which an. angle formed between the straight line and the intra-groove groove is smaller than the predetermined angle, and which is continuous with the high-angle groove section,the high-angle groove section is positioned closer, than the low-angle groove section, to an intra-groove center line passing through a center of a tread width direction of the circumferential groove, anda width perpendicular to an extension direction of thehigh-angle groove section is wider than a width perpendicular to an extension direction of the low-angle groove section.
1 Assignment
0 Petitions
Accused Products
Abstract
An intra-groove groove 310,330 is formed in circumferential groove 31,33 which is formed in a pneumatic tire 1, the intra-groove groove 310,330 is recessed farther inward in a tire radial direction TR than the circumferential groove 31,33. The intra-groove groove 310,330 includes a high-angle groove section 311,331 in which an angle θ1 formed between a straight line L1 and the intra-groove groove 310,330 is equal to or more than a predetermined angle, and a low-angle groove section 312,332 in which an angle θ2 formed between the straight line L1 and the intra-groove groove 310,330 is smaller than the predetermined angle. The high-angle groove section 311,331 is positioned closer to an intra-groove center line DCL than the low-angle groove section 312,332. A width W1 of the high-angle groove section 311, 331 is wider than a width W2 of the low-angle groove section 312, 332.
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Citations
6 Claims
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1. A tire comprising:
- a plurality of rib-shaped land portions which extend in a tire circumferential direction; and
a circumferential groove positioned between the land portions and extending in the tire circumferential direction, wherein the circumferential groove is formed with an intra-groove groove recessed farther inward in a tire radial direction than the circumferential groove with a groove bottom of the circumferential groove being an upper end of the intra-groove groove, the intra-groove groove includes; a high-angle groove section in which an angle formed between a straight line perpendicular to a tire equator line and the intra-groove groove is equal to or more than a predetermined angle, and a low-angle groove section in which an. angle formed between the straight line and the intra-groove groove is smaller than the predetermined angle, and which is continuous with the high-angle groove section, the high-angle groove section is positioned closer, than the low-angle groove section, to an intra-groove center line passing through a center of a tread width direction of the circumferential groove, and a width perpendicular to an extension direction of the high-angle groove section is wider than a width perpendicular to an extension direction of the low-angle groove section. - View Dependent Claims (2, 3, 4, 5, 6)
- a plurality of rib-shaped land portions which extend in a tire circumferential direction; and
Specification