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.

1 . 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 . The pneumatic tire according to  claim 1 , wherein
 another surface is provided between in each recess the curved surfaces of the one end side in the width direction and the curved surface of the other end side in the width direction, and another surface is formed by a plane or a curved surface of which the center of curvature is disposed at the inside in the tire width direction.   
     
     
         3 . 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   each recess is 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, and   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.   
     
     
         4 . The pneumatic tire according to  claim 1 , wherein
 said indication portion comprises a plurality of figures which are arranged at intervals with each other in a tire circumferential direction on the outer surface of the side wall and each formed in a parallelogram shape, and   the said recesses are provided on the surface of each of figures.   
     
     
         5 . The pneumatic tire according to  claim 3 , wherein
 said indication portion comprises a plurality of figures which are arranged at intervals with each other in a tire circumferential direction on the outer surface of the side wall and each formed in a parallelogram shape, and   the said recesses are provided on the surface of each of figures.   
     
     
         6 . 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.   
     
     
         7 . The pneumatic tire according to  claim 6 , wherein
 another surface is provided between in each recess the curved surfaces of the one end side in the width direction and the curved surface of the other end side in the width direction, and another surface is formed by a plane or a curved surface of which the center of curvature is disposed at the inside in the tire width direction.   
     
     
         8 . 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 said 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   each recess is 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, and   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.   
     
     
         9 . The pneumatic tire according to  claim 3 , wherein
 the width of said each recess is 10 times larger or more of the depth.   
     
     
         10 . The pneumatic tire according to  claim 3 , wherein
 the width of said each recess is 15 times larger or more of the depth.   
     
     
         11 . (canceled) 
     
     
         12 . The pneumatic tire according to  claim 1 , wherein
 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 29 times larger or more of the depth of the recess in which the curved surfaces are provided.   
     
     
         13 . The pneumatic tire according to  claim 1 , wherein
 said indication portion comprises a plurality of letters or a plurality of figures disposed so as to be aligned in a tire circumferential direction, a plurality of recesses is provided on each letter or each figure respectively, and the respective recesses of mutually adjacent two letters or figures are aligned in the tire circumferential direction.   
     
     
         14 . The pneumatic tire according to  claim 3 , wherein
 said indication portion comprises a plurality of letters or a plurality of figures disposed so as to be aligned in a tire circumferential direction, a plurality of said recesses is provided on each letter or each figure, respectively, and the respective recesses of mutually adjacent two letters or figures are aligned in the tire circumferential direction.   
     
     
         15 . The pneumatic tire according to  claim 4 , wherein
 the respective figures of said indication portion are disposed so as to be aligned in the tire circumferential direction, and the recesses provided on mutually adjacent two figures are aligned in the tire circumferential direction.   
     
     
         16 . The pneumatic tire according to  claim 5 , wherein
 the respective figures of said indication portion are disposed so as to be aligned in the tire circumferential direction, and the recesses provided on mutually adjacent two figures are aligned in the tire circumferential direction.   
     
     
         17 . The pneumatic tire according to  claim 6 , wherein
 a plurality of said projection portions is disposed so as to be aligned in a tire circumferential direction, a plurality of said recesses are provided on the respective projection portions, and the respective recesses provided on mutually adjacent two projection portions are aligned in the tire circumferential direction respectively.   
     
     
         18 . The pneumatic tire according to  claim 8 , wherein
 a plurality of said projection portions is disposed so as to be aligned in a tire circumferential direction, a plurality of said recesses are provided on the respective projection portions, and the respective recesses provided on mutually adjacent two projection portions are aligned in the tire circumferential direction respectively.   
     
     
         19 . The pneumatic tire according to  claim 13 , wherein
 said indication portion is composed of two or more letters or figures disposed so as to be aligned side by side in the tire circumferential direction.   
     
     
         20 . The pneumatic tire according to  claim 15 , wherein
 said indication portion is composed of two or more figures disposed so as to be aligned side by side in the tire circumferential direction.   
     
     
         21 . The pneumatic tire according to  claim 17 , wherein
 two or wore said projection portions are disposed so as to be aligned side by side in the tire circumferential direction.   
     
     
         22 . The pneumatic tire according to  claim 6 , wherein
 the width of said each recess is 10 times larger or more of the depth.   
     
     
         23 . The pneumatic tire according to  claim 8 , wherein
 the width of said each recess is 10 times larger or more of the depth.   
     
     
         24 . The pneumatic tire according to  claim 6 , wherein
 the width of said each recess is 15 times larger or more of the depth.   
     
     
         25 . The pneumatic tire according to  claim 8 , wherein
 the width of said each recess is 15 times larger or more of the depth.   
     
     
         26 . The pneumatic tire according to  claim 6 , wherein
 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 29 times larger or more of the depth of the recess in which the curved surfaces are provided.   
     
     
         27 . The pneumatic tire according to  claim 14 , wherein
 said indication portion is composed of two or more letters or figures disposed so as to be aligned side by side in the tire circumferential direction.   
     
     
         28 . The pneumatic tire according to  claim 16 , wherein
 said indication portion is composed of two or more figures disposed so as to be aligned side by side in the tire circumferential direction.   
     
     
         29 . The pneumatic tire according to  claim 18 , wherein
 two or wore said projection portions are disposed so as to be aligned side by side in the tire circumferential direction.