PNEUMATIC TIRE
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.
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The present invention relates to a pneumatic tire provided with an indication portion showing a trademark, a tire model, a figure and the like and a projection portion such as a side protector and the like disposed on an outer surface of a side wall.
BACKGROUND ARTIn general, as a first example of this type of pneumatic tire, a tire provided with an indication portion such as a mark and the like formed by molding with a vulcanization mold on an outer surface of a side wall is known. On the surface of this indication portion, an edge section 100 is disposed as shown in
Also, as a second example of this type of pneumatic tire, a tire provided with an indication portion such as a mark and the like formed by molding with a vulcanization mold on an outer surface of a side wall is known. On the surface of this indication portion, a plurality of grooves is disposed to be aligned side by side with each other in the width direction.
Moreover, as a third example of this type of pneumatic tire, a tire provided with a plurality of grooves referred to as ridges so as to be aligned side by side with each other in its width direction within a predetermined range in the radial direction of its side wall is known.
Patent Document 1: Japanese Patent Publication No. 10-067208
Patent Document 2: Japanese Patent Publication No. 9-086106
Patent Document 3: Japanese Patent Publication No. 2006-213282
DISCLOSURE OF THE INVENTION Problems to be Solved by the InventionIn the pneumatic tire in the first example, the step is provided between the edge section 100 and the inner section 101 of the indication portion. Thus, a shade of the edge section 100 is formed on the inner section 101 in the vicinity of the edge section 100, and presence of the step on the surface of the indication portion can be visually recognized. However, to provide projection portions or the like continuing in the circumferential direction on the outer surface of the side wall is commonly performed and to provide another step on the outer surface of the side wall is also common. Thus, the step of the indication portion cannot be conspicuous, and it is difficult to improve the visibility of the indication portion by providing the step.
Also, in the pneumatic tire in the second example, a plurality of grooves is disposed in the indication portion. Thus, the portion other than the groove portions appears bright, while the groove portions appear dark, and the presence of the plurality of grooves on the surface of the indication portion can be visually recognized. However, as shown in the third example, to provide ridges on the outer surface of the side wall is commonly performed, and the ridges and the grooves in the indication portion are similar to each other. Thus, if the ridges are disposed on the side wall, the indication portion is not conspicuous, which is not preferable in improvement of visibility of the indication portion.
An object of the present invention is to provide a pneumatic tire that can effectively improve visibility of the indication portion disposed on the side wall.
Means for Solving the ProblemsIn order to achieve the above object, a pneumatic tire of the present invention is provided with an indication portion formed by molding a letter or a figure on an outer surface of a side wall, 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, 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.
Also, the pneumatic tire of the present invention is provided with a projection portion formed by a vulcanization mold on an outer surface of a side wall, 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, 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.
As mentioned above, the plurality of recesses is provided on the surface of the letter or figure of the indication portion or the surface of the projection portion, and the respective recesses are so provided as to extend in the predetermined direction and arranged side by side with each other in the direction crossing the extending direction. Also, one end side and the other end side of each recess in the width direction are respectively formed by a curved surface of which the center of curvature is disposes at the outside in the tire width direction. Thus, gradation of brightness occurs on the curved surface portion of the recess, the gradation occurs on each recess and the gradation changes depending on the viewing direction or the light direction.
Also, since the side wall is a part of a tire formed in a toroidal shape, the respective recesses become arranged so that the facing directions thereof are slightly different from each other. Thus, the change of gradation in each recess appears different from each other.
Also, a ridge line is formed at a portion where the curved surfaces of mutually adjacent two recesses are crossing. Thus, brightness of the surface of the letter or figure constituting the indication portion or the brightness of the surface of the projection portion is changed across the ridge line.
Also, the pneumatic tire of the present invention is provided with the indication portion formed by molding a letter or a figure on an outer surface of a side wall, 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.
Also, the pneumatic tire of the present invention is provided with the projection portion formed by a vulcanization mold on an outer surface of a side wall, 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.
As mentioned above, the plurality of recesses is provided on the surface of the character or figure of the indication portion or the surface of the projection portion, and the respective recesses are so provided as to extend in the predetermined direction and arranged side by side with each other in a direction crossing the extending direction. Also, each recess is formed by a curved surface of which the center of curvature is disposes at the outside in the tire width direction. Thus, gradation of brightness occurs on the curved surface portion of the recess, the gradation occurs on each recess and the gradation of each recess changes depending on the viewing direction or the light direction.
Also, since the side wall is a part of a tire formed in a toroidal shape, the respective recesses become arranged so that the facing directions thereof are slightly different from each other. Thus, the change of gradation in each recess appears different from each other.
Also, the ridge line is formed at a portion where the curved surfaces of mutually adjacent two recesses are crossing. Thus, brightness of the surface of the letter or figure constituting the indication portion or the brightness of the surface of the projection portion is changed across the ridge line.
Advantages of the InventionAccording to the present invention, since the gradation of brightness of each recess changes depending on the viewing direction or the light direction, the surface of the indication portion or the projection portion looks three-dimensionally, and the indication portion or the projection portion can become more distinct than the other portions of the side wall. That is, it is extremely advantageous in effective improvement of the visibility of the indication portion or the projection portion disposed on the side wall.
Also, the gradation of brightness of each recess changes depending on the viewing direction or the light direction, the change of gradation in each recess appears different from each other, and the brightness of the surface of the character or figure constituting the indication portion or the brightness of the surface of the projection portion is changed across the ridge line. Thus, the surface of the letter or figure constituting the indication portion or the surface of the projection portion gives unique impression to viewers. That is, it is extremely advantageous in improvement of the visibility of the indication portion or the projection portion disposed on the side wall.
The above object as well as the other objects, characteristics and advantages of the present invention will become apparent from the following description and the attached drawings.
10 . . . Side wall, 20 . . . First indication portion, 21 . . . Figure, 22 . . . Recess, 23 . . . Projection portion, 24 . . . Recess, 24a . . . First slanting surface, 24b . . . Second slanting surface, 30 . . . Second indication portion, C1, C2 . . . Center of curvature, CS . . . Curved surface, OS . . . Another surface, W . . . Width, D . . . Depth, RL . . . Ridge line, VL . . . Valley line.
BEST MODE FOR CARRYING OUT THE INVENTIONAs shown in
The first indication portion 20 is formed of a plurality of parallelogrammic
In the pneumatic tire thus formed, the plurality of recesses 22 are provided on the surface of each
Thus, in the present embodiment, the gradation of brightness on the each recess 22 changes depending on the viewing direction or the lighting direction. Therefore, each
Further, the ridge line RL is formed at the portion where the curved surfaces of mutually adjacent two recesses 22 are crossing, and the ridge line RL is visually recognizable. Therefore, by means of a combination of the gradation on the recess 22 and a plurality of the ridge lines RL, the each
Also, the first indication portion 20 is formed by the plurality of
Also, each recess 22 is provided so as to extend in the tire circumferential direction. Therefore, it is advantageous in reducing an air drag of the tire. Forming the vulcanization mold is also facilitated.
Also, grooves are formed on portions of the vulcanization mold corresponding to the ridge lines RL. Therefore, air or generated gas at the time of vulcanization molding can be released through the grooves, and it is advantageous in improving the rubber flow in the portions for the
Also, the appearances of the gradation on the each recess 22 and the each ridge line RL change with a change in the relationship between the width W (width size) and the depth D (depth size) of the recess 22. In this specification, the width direction of the recess 22 is perpendicular to the extending direction of the recess 22, and on the width W (width size) of the recess 22 is the size of the recess 22 in the width direction.
Also, the appearances of the gradation on the each recess 22 and each ridge line RL change with a change in magnitude of the width W of the recess 22.
In the present embodiment, the recesses 22 are formed by curved surfaces of which the single center of curvature C1 is disposed at the outside in the tire width direction. However, it is possible to gradually change the curvature of the curved surfaces of each recess 22. In such case, the center of the curvature at the outside in the tire width direction is made plural or in the form of a line. Also, even in the case of gradually changing the curvature of the curved surface of the recess 22, the same functions and effects as those in the case where the single center of curvature C1 is provided can be achieved.
In the present embodiment, the whole of each recess 22 is formed by the curved surface of which the center of curvature C1 is disposed at the outside in the tire width direction. However, as shown in
Also in this case, the radius of curvature of the curved surface CS changes with changes in the width W and the depth D of the recess 22. That is, the appearances of the gradation on the each recess 22 and each ridge line RL change. The relationship between the proportion of the width W to the depth D and the visibilities of the gradation and each ridge line RL, and the relationship between the magnitude of the depth W of the recess 22 and the visibilities of the gradation and each ridge line RL are the same as the results shown in
Also, as shown in
In the present embodiment, four recesses 22 are provided in each
In the present embodiment, a plurality of recesses 22 are provided on the surface of each
In the second embodiment, a plurality of projection portions 23 are provided in place of the plurality of recesses 22 on each
In this case, the projection portions 23 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 (in a direction perpendicular to the extending direction in the present embodiment). Each projection 23 is formed by a curved surface of which a center of curvature C2 is disposed at the inside of the curved surface in the tire width direction.
In the pneumatic tire thus formed, the plurality of projection portions 23 are provided on the surface of each figure of the first indication portion 20. Also, the projection portions 23 are provided so as to extend in the tire circumferential direction and are aligned side by side with each other in the direction crossing the extending direction. The each projection portion 23 is formed by the curved surface of which the center of curvature C2 is disposed at the inside in the tire width direction. Therefore, gradation of brightness occurs on the curved surface of the each projection portion 23. The gradation on the each projection portion 23 changes depending on the viewing direction or the lighting direction. Further, the side wall 10 is a part of the tire formed in a toroidal shape and the directions in which the projection portions 23 face are slightly different from each other. Accordingly, the changes of gradation in the projection portions 23 also differ from each other. Further, a valley line VL is formed at a portion where the curved surfaces of mutually adjacent two projections 23 are crossing, and the brightness of the surface of the
Thus, in the present embodiment, the gradation on the each projection 23 changes depending on the viewing direction or the lighting direction. Therefore, each
Further, the valley line VL is formed at the portion where the curved surfaces of the projections 23 are crossing, and the valley line VL is visually recognizable. Therefore, by means of a combination of the gradation on the projection 23 and a plurality of the valley lines VL the first indication portion 20 gives a unique impression to viewers.
Also, each projection 23 is provided so as to extend in the tire circumferential direction. Therefore, it is advantageous in reducing the air drag of the tire. Forming the vulcanization mold is also facilitated.
In the third embodiment, a plurality of recesses 24 are provided in place of the plurality of recesses 22 on the each
In this case, the recesses 24 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 (in a direction perpendicular to the extending direction in the present embodiment). The each recess 24 is formed by a first slanting surface 24a slanting from one end of the recess 24 in the width direction toward a center in the width direction inwardly of the tire, and a second slanting surface 24b slanting from the other end of the recess 24 in the width direction toward the center in the width direction inwardly of the tire. The each of the slanting surfaces 24a and 24b is formed into a planar shape. The width W of each recess 24 is approximately five times larger than the depth D.
In the pneumatic tire thus formed, the plurality of recesses 24 are provided on the surface of each
Thus, in the present embodiment, the brightnesses on the first slanting surface 24a and the second slanting surface 24b change depending on the viewing direction or the lighting direction. Therefore, each
Further, the ridge line RL is formed between the mutually adjacent two recesses 24, the valley line VL is formed at the portion where the slanting surfaces 24a and 24b are crossing, and the ridge line RL and the valley line VL are visually recognizable. Therefore, by means of a combination of the changes of the brightnesses on the slanting surfaces 24a and 24b and pluralities of the ridge lines RL and valley lines VL, the first indication portion 20 gives a unique impression to viewers.
Also, the appearances of the gradation on each recess 24, each line RL and each line VL change with a change in the relationship between the width W and the depth D of the recess 24.
In the present embodiment, each of the slanting surfaces 24a and 24b is formed into a planar shape. However, as shown in
In the first to third embodiments, each recess 22, each projection portion 23 and each recess 24 are formed so as to extend in the tire circumferential direction. However, as shown in
Further, in the first and third embodiments, the proportion of the width W to the depth D of each recess 22 and each recess 24 can be made constant along the extending direction or gradually increased or reduced along the extending direction. Further, as shown in
In the first embodiment, as shown in
Further, in the first embodiment, as shown in
In the first embodiment, as shown in
In the first embodiment, the visibilities of each ridge line RL and the gradation were evaluated by setting the width W to be 4 mm and setting the ratio of the width W to the depth D to be a plurality of values (see
The applicant prepared a plurality of kinds of CG (computer graphic) models with a plurality of settings of the width W and the depth D of recesses 22 so as to evaluate the visibilities of ridge lines RL and gradation, as shown in
As to
The results of evaluation of the visibilities of the ridge lines RL and the gradation on
As shown in
Also, as shown in
On the other hand, it is found that, as shown in
Also, as shown in
That is, it is found that the visibilities of the ridge lines RL and the gradation are good when the ratio (W/D) of the width W to the depth D is equal to or higher than 2 and equal to or lower than 60, the visibility of the gradation is improved when the ratio (W/D) of the width W to the depth D is equal to or higher than 5 and equal to or lower than 60, and the visibility of the gradation is further improved when the ratio (W/D) of the width W to the depth D is equal to or higher than 10 and equal to or lower than 60. In the case where the recess is deep (the ratio W/D is low), a part of the surface of the recess is invisible due to the projection in the vicinity of the ridge line (such condition is called as “seen as a difference in level” in this specification) or a part of the surface of the recess is difficult to be seen due to the projection in the vicinity of the ridge line when the model is viewed in the direction approximately at 30° from the one surface in the thickness direction. Therefore, it is thought that among 2 and 10 of the ratio (W/D) of the width W to the depth D, the visibility of the gradation in the recess is improved with increase in W/D.
As to the
Further, as shown in
Also, as shown in
Referring to
First, as an example of the recess 22 in which one end side and the other end side in the width direction are formed by curved surfaces CS while another surface OS is formed of a flat surface or a curved surface of which a center of curvature is disposed at the inside in the tire width direction, as shown in
That is, even when one end side and the other end side of each recess 22 in the width direction are formed by curved surfaces CS while another surface OS is formed of a flat surface or a curved surface of which a center of curvature is disposed at the inside in the tire width direction, if the depth of each recess 22 is 0.1 mm or more, by satisfying the conditions in terms of the width W and the ratio (R/D) of the radius of curvature R to the depth D, the visibilities of the ridge lines RL and the gradation become good.
Also, the visibilities of the ridge lines RL and the gradation are good when the width W of each recess 22 is among 4 mm and a larger value.
Also, the visibilities of the ridge lines RL and the gradation become good when the ratio (W/D) of the width W to the depth D is equal to or higher than 2, and when the ratio (R/D) of the radius of curvature R to the depth D is equal to or higher than 1 and equal to or lower than 451. In this case, the upper limit on the ratio (W/D) of the width W to the depth D as in the case where the recess 22 is formed by a single circular arc is not set up. This is because the visibilities of the ridge lines RL and the gradation depend on the ratio (R/D) of the radius of curvature R to the depth D in the case of the recess 22 in which one end side and the other end side in the width direction are formed by curved surfaces CS while the other surface OS is formed of a flat surface or a curved surface of which a center of curvature is disposed at the inside in the tire width direction, and because W/D can be adjusted depend on the length of the other surface OS.
Similarly, the visibilities of the ridge lines RL and the gradation improves when the ratio (W/D) of the width W to the depth D is equal to or higher than 5, and when the ratio (R/D) of the radius of curvature R to the depth D is equal to or higher than 4 and equal to or lower than 451. Further, the visibilities of the ridge lines RL and the gradation are improved when the ratio (W/D) of the width W to the depth D is equal to or higher than 10, and when the ratio (R/D) of the radius of curvature R to the depth D is equal to or higher than 13 and equal to or lower than 451.
When R/D is 13 or higher, the evaluation of the 30° direction viewing results is “cannot be seen as a difference in level”. When R/D is 29 or higher, the evaluation of the 15° direction viewing results is “cannot be seen as a difference in level”.
The above-described depth D is the maximum depth with respect to an imaginary straight line IL connecting the two ends of the recess 22 in the width direction, as shown in
It is preferable to set the region (area) where the other surface of the recess 22 is provided to be 75% or less, more preferably 50% or less, further preferably 30% or less of the area of the recess 22 in order that the ridge lines RL and the gradation can be conspicuous on the surface of the
Thus, when the recess 22 in which one end side and the other end side in the width direction are formed by curved surfaces CS and the other surface OS is formed of a flat surface or a curved surface of which a center of curvature is disposed at the inside in the tire width direction, it is advantageous in increasing the range of adjustment of the ratio (W/D) of the width W to the depth D comparing to the case where the recess 22 is formed by a single circular arc.
Further, when the recess 22 in which one end side and the other end side in the width direction are formed by curved surfaces CS and the other surface OS is formed of a flat surface, it is advantageous in facilitating forming the vulcanization mold comparing to the case where the recess 22 is formed by the single circular arc.
While the evaluations shown in
As shown in
In the above-described embodiments, an arrangement in which a plurality of
In this specification, the region between an end portion of a tire tread pattern and a bead portion is referred to as side wall 10.
The preferred modes described in this specification are not limitative but illustrative of the invention. The scope of the invention is shown in the appended claims. The present invention encompasses all modifications falling within the meanings of the claims.
Claims
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.
Type: Application
Filed: Jan 20, 2009
Publication Date: Oct 20, 2011
Applicant: THE YOKOHAMA RUBBER CO., LTD. (Minato-ku, Tokyo)
Inventors: Hiroshi Tokizaki (Tokyo), Takumi Morito (Tokyo)
Application Number: 12/999,153
International Classification: B60C 13/00 (20060101);