US 2011/0253278 A1 · PNEUMATIC TIRE

Abstract

This pneumatic tire has a plurality of recesses 22 provided on the surface of each FIG. 21 of a first indication portion 20. The recesses 22 are provided so as to extend in the tire circumferential direction and are aligned side by side with each other in a direction crossing the extending direction. One end side and the other end side in the width direction of each recess 22 are formed by curved surfaces of which a center of curvature is disposed at the outside in the tire width direction. Therefore, gradation of brightness occurs on the curved surface on the each recess 22. The gradation on the each recess 22 changes depending on the viewing direction or the lighting direction. Therefore, each FIG. 21 in the first indication portion 20 looks three-dimensionally and can become more conspicuous than the other portions of a side wall 10.

Claims29

Dependent claims

A pneumatic tire provided with an indication portion formed by molding a letter or a figure on an outer surface of a side wall of the pneumatic tire, the pneumatic tire comprising

a plurality of recesses provided on the surface of the letter or the figure of said indication portion, the recesses each extending in a predetermined direction and aligned side by side with each other in a direction crossing the said extending direction, wherein
one end side and the other end side of each recess in its width direction are respectively formed by a curved surface of which the center of curvature is disposed at the outside in a tire width direction,
a ridge line is formed at a portion where the curved surfaces of mutually adjacent two recesses are crossing,
each recess has the depth of 0.1 mm or more and the width of 4 mm or more, and the width of each recess is five times larger or more of the depth, and
radiuses of curvature of the curved surfaces of the one end side in the width direction and the other end side in the width direction of said each recess are 13 times larger or more of the depth of the recess in which the curved surfaces are provided.

2 more elements

A pneumatic tire provided with a projection portion formed by a vulcanization mold on an outer surface of a side wall of the pneumatic tire, the pneumatic tire comprising

a plurality of recesses provided on the surface of the projection portion, the recesses each extending in a predetermined direction and aligned side by side with each other in a direction crossing the said extending direction, wherein
one end side and the other end side of each recess in its width direction are respectively formed by a curved surface of which the center of curvature is disposed at the outside in a tire width direction,
a ridge line is formed at a portion where the curved surfaces of mutually adjacent two recesses are crossing,
each recess has the depth of 0.1 mm or more and the width of 4 mm or more, and the width of each recess is five times larger or more of the depth, and
radiuses of curvature of the curved surfaces of the one end side in the width direction and the other end side in the width direction of said each recess are 13 times larger or more of the depth of the recess in which the curved surfaces are provided.

2 more elements

Dependencies are inferred from the claim text.

Pneumatic tire

Life of this patent

Pneumatic tire

Life of this patent

Abstract

Claims29