Inside Structure of Dimple for Golf Ball
The present invention provides a dimple structure for golf balls. In the present invention, a plurality of dimples (50a) each having a predetermined shape is disposed on an outer surface of a golf ball in a predetermined arrangement. The dimple structure of the present invention includes at least one protrusion (60a) which is integrally provided in the dimple (50a), thus increasing the contact area between the golf ball and the head of a golf club, and increasing resilient force of the golf ball against the golf club head, thereby increasing the distance that the golf ball is driven. As well, the present invention increases the amount of backspin on the golf ball when an approach shot is executed near the putting green, thus allowing the rolling action of the golf ball on the putting green to be easily controlled.
The present invention relates, in general, to dimple structures for golf balls and, more particularly, to a dimple structure for golf balls in which a protrusion is integrally provided in a dimple of a golf ball, thus increasing the contact area between the golf ball and the head of a golf club when striking the golf ball with the golf club, thereby preventing the golf ball from being deformed due to the impact force applied to the golf ball when striking the golf ball, and increasing the distance that the golf ball is driven by increasing the resilient force of the golf ball to promote rapid initial motion of the golf ball, and in which, because a plurality of protrusions gives the golf ball a more closely circular shape, a rolling action of the golf ball on a putting green becomes stable, thus ensuring more precise and accurate putting.
BACKGROUND ARTGenerally, golf balls are classified according to the structure thereof into various kinds of golf balls, for example, a one piece golf ball having a single structure, a two piece golf ball which is provided with a core and a cover to surround the core, and a three piece golf ball of a solid type which has a double core structure, including an inner core and an outer core surrounding the inner core, and which is provided with a cover to surround the double core.
Typically, such various golf balls have plural dimples which have predetermined concave shapes and are configured on an outer surface of a golf ball in a predetermined arrangement.
Dimples are intended to improve the driving distance of a golf ball when struck by a golf club by reducing air resistance on the driving golf ball.
Every existing golf ball includes such dimples on an outer surface thereof. Because driving characteristics of a golf ball depend on the disposition, sizes, shapes and depths of the dimples, studies have been conducted on the dimples. In particular, it has been a goal to reduce air resistance on the driven golf ball by varying the shape, number or arrangement of dimples of the golf ball.
However, in conventional golf balls which are provided with dimples having concave shapes, when a golf ball is struck by a golf club, the golf ball may be deformed at a contact surface between the golf ball and the head of the golf club. As such, if the golf ball is deformed when struck by the golf club, air resistance on the golf ball increases. As a result of this, the driven golf ball curves in an undesirable direction. Furthermore, the time required to drive the golf ball using the reaction force and resilient force occurring when the golf ball is struck increases, thus decreasing the distance that the golf ball is driven.
As an example of prior arts to solve the above-mentioned problems, a golf ball having a plurality of reinforcing members as shown in
In the above-mentioned conventional golf ball having therein the reinforcing members 40, because the reinforcing members 40 are provided in the golf ball in radial directions from the center of the golf ball to the outside, when the golf ball is struck by a golf club, the impact, transmitted from the golf club head to the outer surface of the cover 30 of the golf ball, is gathered through the reinforcing members 40 at the inner core 10, which is located at the center of the golf ball. At this time, the reinforcing members 40 prevent the golf ball from being undesirably deformed due to the impact transmitted from the golf club, thus increasing the distance that the golf ball is driven.
However, the conventional golf ball having the reinforcing members therein is problematic in that manufacturing costs increase due to the separate reinforcing members. Furthermore, because the reinforcing members are made of metal bars, when impact is transmitted from a golf club to the golf ball, the elastic inner and outer cores and the cover may be damaged by the reinforcing members.
In
In the above-mentioned conventional golf ball having the impact transmission members 40a, because the impact transmission members 40a are provided in the golf ball in radial directions from the center of the golf ball to the outside, when the golf ball is struck by a golf club, the impact, transmitted from the golf club head to the outer surface of the cover 30 of the golf ball, is transmitted through the impact transmission members 40a to the first core 10a of the inner core 10 which is placed at the center of the golf ball. At this time, the impact transmission members 40a prevent the golf ball from being deformed due to the impact transmitted from the golf club, thus increasing the distance that the golf ball is driven.
In other words, when impact energy from the golf club head is applied to the golf ball, the impact energy is transmitted to the first core of the inner core via the cover and the impact transmission members. This impact energy acts as the force to drive the golf ball. At this time, reaction force reacting to the impact energy transmitted to the inner core is generated in the golf ball. This reaction force is transmitted to the cover through the impact transmission members, thus preventing the golf ball from being deformed at the impact portion thereof at which the golf ball comes into contact with the golf club head.
However, this golf ball has a problem of increased manufacturing costs due to the separate impact transmission members, as in the above-mentioned golf ball having therein the reinforcing members. Furthermore, the productivity is reduced. In addition, in a process of striking the golf ball with a golf club, the impact transmission members may damage the elastic inner and outer cores and the cover when the impact is transmitted to impact transmission members.
DISCLOSURE OF INVENTION Technical ProblemAccordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a dimple structure for golf balls in which a protrusion is integrally provided in a dimple of a golf ball having a concave shape, thus increasing the contact area between the golf ball and the head of a golf club when striking the golf ball with the golf club, and increasing the resilient force of the golf ball against the golf club head, thereby increasing the distance that the golf ball is driven.
Another object of the present invention is to provide a dimple structure for golf balls which is able to prevent a golf ball, which comes into contact with the head of a golf club when struck by the golf club, from being undesirably deformed, and increase the resilient force of the golf ball to promote a rapid initial motion of the golf ball.
A further object of the present invention is to provide a dimple structure for golf balls in which, as a plurality of protrusions gives a golf ball a more closely circular shape, a rolling action of the golf ball on a putting green becomes stable, thus ensuring more precise and accurate putting, and which is able to increase the amount of backspin on the golf ball when an approach shot is executed near the putting green, thus allowing the rolling action of the golf ball on the putting green to be easily controlled.
Yet another object of the present invention is to provide a dimple structure for golf balls which prevents the elastic inner and outer cores and a cover of a golf ball from damage.
Still another object of the present invention is to provide a dimple structure for golf balls which is able to enhance productivity and reduce manufacturing costs.
Technical SolutionIn order to accomplish the above objects, the present invention provides a dimple structure for golf balls, wherein a plurality of dimples each having a predetermined shape is disposed on an outer surface of a golf ball in a predetermined arrangement, the dimple structure including: at least one protrusion integrally provided in the dimple, thus increasing the contact area between the golf ball and the head of a golf club when striking the golf ball with the golf club, and increasing the resilient force of the golf ball against the golf club head, thereby increasing the distance that the golf ball is driven.
Furthermore, the protrusion constituting the dimple structure for golf balls may have various shapes or may have the same shape as that of the dimple. The protrusion may be provided between an outer circumferential line and an inner circumferential line between which a depth of the dimple is defined, so that the protrusion does not protrude outside the outer circumferential line, thus reducing the air resistance on the driving golf ball, and ensuring the superior rolling performance of the golf ball.
In addition, the protrusion constituting the dimple structure for golf balls may be provided in each dimple of the golf ball or, alternatively, it may be evenly provided in 15% to 85% of the dimples of the golf ball such that the center of gravity of the golf ball exists at the same point in the golf ball regardless of the orientation of the golf ball.
As well, the protrusion constituting the dimple structure for golf balls may have a size of 5% to 60% of the surface area of the dimple, thus reducing the weight of the golf ball.
Advantageous EffectsA dimple structure for golf balls according to present invention, at least one protrusion is integrally provided in a dimple of a golf ball having a concave shape of an engraving pattern, thus increasing the contact area between the golf ball and the head of a golf club when striking the golf ball with the golf club, and increasing the resilient force of the golf ball against the golf club head, thereby increasing the distance that the golf ball is driven.
Furthermore, the dimple structure for golf balls is able to prevent the golf ball, which comes into contact with the head of a golf club when struck by the golf club, from being undesirably deformed, and increase the resilient force of the golf ball to promote rapid initial motion of the golf ball.
Moreover, in the dimple structure for golf balls according to the present invention, as a plurality of protrusions gives the golf ball a more closely circular shape, a rolling action of the golf ball on a putting green becomes stable, thus ensuring more precise and accurate putting. As well, the present invention is able to increase the amount of backspin on the golf ball when an approach shot is executed near the putting green, thus allowing the rolling action of the golf ball on the putting green to be easily controlled.
In addition, the dimple structure for golf balls prevents the elastic inner and outer cores and the cover of the golf ball from damage.
Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.
As shown in the drawings, a plurality of dimples 50a each having a circular concave shape is disposed on the golf ball 1 in a predetermined arrangement. The dimple structure for golf balls according to the first embodiment of the present invention includes at least one protrusion 60a which has the same circular shape as that of the dimple 50a and is integrally provided in the dimple 50a.
The protrusion 60a is not limited to the circular shape, but it may be shaped differently from the shape of the dimple 50a. That is, the protrusion 60a may be formed in various shapes, such as a rectangular, square, cylindrical or pyramid shape. Alternatively, several protrusions 60a having different shapes may be simultaneously used.
Preferably, a circular protrusion 60a is provided in each of the dimples 50a. As such, a golf ball in which a circular protrusion 60a is provided in each dimple 50a is suitable for golf beginners. That is, because the circular protrusions 60a are evenly formed throughout the entire surface of the golf ball, although a golf beginner may strike any portion of the golf ball with a golf club, the head of the golf club comes into contact with a portion of the golf ball in which circular protrusions 60a exist.
In this case, there is a problem of increased weight of the golf ball, but this problem can be solved by changing the material or size of an inner core of the golf ball, or the material or size of a cover, or the depth or area of the dimples in a process of manufacturing the golf ball.
It is preferred that the circular protrusion 60a be provided in 15% to 85% of the dimples 50a of the golf ball 1. Here, the circular protrusions 60a are evenly arranged such that the center of gravity of the golf ball 1 exists at the same point in the golf ball 1 regardless of the orientation of the golf ball 1.
If the number of circular protrusions 60a is 15% or less of the number of dimples 50a of the golf ball 1, there is little effect of increasing a contact area of an impact surface between the golf ball 1 and the head of a golf club when striking the golf ball 1 with the golf club. Then, the resilient force of the golf ball 1 against the golf club head is not increased. On the other hand, if the number of circular protrusions 60a is 85% or more of the number of dimples 50a of the golf ball 1, because the weight of the golf ball 1 is increased and, as well, air resistance is increased, the distance that the golf ball 1 is driven is reduced.
A golf ball, in which the number of circular protrusions 60a is 15% to 50% of the number of dimples 50a, is suitable for expert golfers. A golf ball, in which the number of circular protrusions 60a is 50% to 85% of the number of dimples 50a, is suitable for intermediate golfers.
This is because, in the case of a golf ball 1 having a small number of circular protrusions 60a, it is difficult for golf beginners or intermediate golfers to precisely strike the portion of the golf ball in which the circular protrusions 60a are formed to increase the resilient force of the golf ball.
Preferably, in consideration of both air resistance when the golf ball 1 is driven and a rolling movement of the golf ball 1 on a putting green, the height of each circular protrusion 60a is the same as or less than the depth (D) of the dimple 50a (see,
In other words, as shown in
This is because, if the circular protrusion 60a protrudes outside the dimple 50a (outside the outer circumferential line (a) of the golf ball 1), there are several problems, specifically, it becomes difficult to correctly strike the golf ball 1, the distance that the golf ball 1 is driven is reduced due to the increased air resistance, and the golf ball 1 cannot smoothly roll on a putting green.
Furthermore, the circular protrusion 60a has a size of 5% to 60% of a cross-sectional area (A) of the dimple 50a (see,
As such, in the present invention, in the center of the dimple 50a having the circular concave shape, at least one protrusion 60a having the same circular shape as that of the dimple 50a is integrally provided. Thus, as the circular protrusions 60a come into contact with the head of a golf club when striking the golf ball 1 with the golf club, the golf ball 1 is prevented from being deformed. Furthermore, because the contact surface (the impact surface) between the golf ball 1 and the golf club head is increased, the resilient force of the golf ball 1 is increased.
Moreover, the circular protrusions 60a give the golf ball a more closely circular shape. Therefore, the golf ball can more smoothly roll on the putting green, so that, when putting, a golfer can putt more precisely and accurately. In addition, because the amount of backspin on the golf ball 1 can be increased when executing an approach shot near the putting green, the rotation of the golf ball can be easily controlled. In other words, as it is possible to increase the amount of backspin on the golf ball due to the circular protrusions 60a which give the golf ball a more closely circular shape, a stop point of the golf ball can be easily controlled by controlling the rotation of the golf ball (controlling the amount of backspin on the golf ball).
As shown in the drawings, a plurality of dimples 50b each having an elliptical concave shape is disposed on the golf ball 1 in a predetermined arrangement. The dimple structure for golf balls according to the second embodiment of the present invention includes at least one protrusion 60b which has the same elliptical shape as that of the dimple 50b and is integrally provided in the dimple 50b.
The protrusion 60b is not limited to the elliptical shape, but it may be shaped differently from the shape of the dimple 50b. That is, the protrusion 60b may be formed in various shapes, such as a circular, rectangular, square, cylindrical or pyramid shape. Alternatively, several protrusions 60b having different shapes may be simultaneously used.
Preferably, the elliptical protrusion 60b is provided in each of the dimples 50b.
Further, it is preferred that the elliptical protrusion 60b be provided in 15% to 85% of the dimples 50b of the golf ball 1. Here, the elliptical protrusions 60b are evenly arranged such that the center of gravity of the golf ball 1 exists at the same point in the golf ball 1 regardless of the orientation of the golf ball 1.
If the number of elliptical protrusions 60b is 15% or less of the number of dimples 50b of the golf ball 1, there is little effect of increasing a contact area of an impact surface between the golf ball 1 and the head of a golf club when striking the golf ball 1 with the golf club. Then, the resilient force of the golf ball 1 against the golf club head is not increased. On the other hand, if the number of elliptical protrusions 60b is 85% or more of the number of dimples 50b of the golf ball 1, because the weight of the golf ball 1 is increased and, as well, air resistance is increased, the distance that the golf ball 1 is driven is reduced.
Furthermore, in consideration of both air resistance when the golf ball 1 is driven and a rolling movement of the golf ball 1 on a putting green, preferably, the height of each elliptical protrusion 60b is the same as or less than the depth (D) of the dimple 50b (see,
In other words, as shown in
This is because, if the elliptical protrusion 60b protrudes outside the dimple 50b (outside of the outer circumferential line (a) of the golf ball 1), there are several problems, specifically, it becomes difficult to correctly strike the golf ball 1, the distance that the golf ball 1 is driven is reduced due to the increased air resistance and, the golf ball 1 cannot smoothly roll on a putting green.
Furthermore, the elliptical protrusion 60b has a size of 5% to 60% of a cross-sectional area (A) of the dimple 50b (see,
As such, in the present invention, in the center of the dimple 50b having the elliptical concave shape, at least one protrusion 60b having the same elliptical shape as that of the dimple 50b is integrally provided. Thus, as the elliptical protrusions 60b come into contact with the head of a golf club when striking the golf ball 1 with the golf club, the golf ball 1 is prevented from being deformed and, as well, an increase in resilient force of the golf ball 1 to promote a rapid initial motion is ensured.
As shown in the drawings, a plurality of dimples 50c each having an equilateral octagonal concave shape is disposed on the golf ball 1 in a predetermined arrangement. The dimple structure for golf balls according to the third embodiment of the present invention includes at least one protrusion 60c which has the same equilateral octagonal shape as that of the dimple 50c and is integrally provided in the dimple 50c.
The protrusion 60c is not limited to the equilateral octagonal shape, but it may be shaped differently from the shape of the dimple 50c. That is, the protrusion 60c may be formed in various shapes, such as a circular, elliptical, rectangular, square, cylindrical or pyramid shape. Alternatively, several protrusions 60c having different shapes may be simultaneously used.
Preferably, the equilateral octagonal protrusion 60c is provided in each of the dimples 50c.
Further, it is preferred that the equilateral octagonal protrusion 60c be provided in 15% to 85% of the dimples 50c of the golf ball 1. Here, the equilateral octagonal protrusions 60c are evenly arranged such that the center of gravity of the golf ball 1 exists at the same point in the golf ball 1 regardless of the orientation of the golf ball 1.
If the number of equilateral octagonal protrusions 60c is 15% or less of the number of dimples 50c of the golf ball 1, there is little effect of increasing a contact area of an impact surface between the golf ball 1 and the head of a golf club when striking the golf ball 1 with the golf club. Then, the resilient force of the golf ball 1 against the golf club head is not increased. On the other hand, if the number of equilateral octagonal protrusions 60c is 85% or more of the number of dimples 50c of the golf ball 1, because the weight of the golf ball 1 is increased and, as well, air resistance is increased, the distance that the golf ball 1 is driven is reduced.
Furthermore, in consideration of both air resistance when the golf ball 1 is driven and a rolling movement of the golf ball 1 on a putting green, preferably, the height of each equilateral octagonal protrusion 60c is the same as or less than the depth (D) of the dimple 50c (see,
In other words, as shown in
This is because, if the equilateral octagonal protrusion 60c protrudes outside the dimple 50c (outside of the outer circumferential line (a) of the golf ball 1), there are several problems, specifically, it becomes difficult to correctly strike the golf ball 1, the distance that the golf ball 1 is driven is reduced due to the increased air resistance and, the golf ball 1 cannot smoothly roll on a putting green.
Furthermore, the equilateral octagonal protrusion 60c has a size of 5% to 60% of a cross-sectional area (A) of the dimple 50c (see,
As such, in the present invention, on the center of the dimple 50c having the equilateral octagonal concave shape, at least one protrusion 60c having the same equilateral octagonal shape as that of the dimple 50c is integrally provided. Thus, as the equilateral octagonal protrusions 60c come into contact with the head of a golf club when striking the golf ball 1 with the golf club, the golf ball 1 is prevented from being deformed and, as well, an increase in resilient force of the golf ball 1 to promote a rapid initial motion is ensured.
As shown in the drawings, a plurality of dimples 50d each having a non-equilateral octagonal concave shape is disposed on the golf ball 1 in a predetermined arrangement. The dimple structure for golf balls according to the fourth embodiment of the present invention includes at least one protrusion 60d which has the same non-equilateral octagonal shape as that of the dimple 50d and is integrally provided in the dimple 50d.
The protrusion 60d is not limited to the non-equilateral octagonal shape, but it may be shaped differently from the shape of the dimple 50d. That is, the protrusion 60d may be formed in various shapes, such as a circular, elliptical, rectangular, square, cylindrical or pyramid shape. Alternatively, several protrusions 60d having different shapes may be simultaneously used.
Preferably, the non-equilateral octagonal protrusion 60d is provided in each of the dimples 50d.
Further, it is preferred that the non-equilateral octagonal protrusion 60d be provided in 15% to 85% of the dimples 50d of the golf ball 1. Here, the non-equilateral octagonal protrusions 60d are evenly arranged such that the center of gravity of the golf ball 1 exists at the same point in the golf ball 1 regardless of the orientation of the golf ball 1.
If the number of non-equilateral octagonal protrusions 60d is 15% or less of the number of dimples 50d of the golf ball 1, there is little effect of increasing a contact area of an impact surface between the golf ball 1 and the head of a golf club when striking the golf ball 1 with the golf club. Then, the resilient force of the golf ball 1 against the golf club head is not increased. On the other hand, if the number of non-equilateral octagonal protrusions 60d is 85% or more of the number of dimples 50d of the golf ball 1, because the weight of the golf ball 1 is increased and, as well, air resistance is increased, the distance that the golf ball 1 is driven is reduced.
Furthermore, in consideration of both air resistance when the golf ball 1 is driven and a rolling movement of the golf ball 1 on a putting green, preferably, the height of each non-equilateral octagonal protrusion 60d is the same as or less than the depth (D) of the dimple 50d (see,
In other words, as shown in
This is because, if the non-equilateral octagonal protrusion 60d protrudes outside the dimple 50d (outside of the outer circumferential line (a) of the golf ball 1), there are several problems, specifically, it becomes difficult to correctly strike the golf ball 1, the distance that the golf ball 1 is driven is reduced due to the increased air resistance and, the golf ball 1 cannot smoothly roll on a putting green.
Furthermore, the non-equilateral octagonal protrusion 60d has a size of 5% to 60% of a cross-sectional area (A) of the dimple 50d (see,
As such, in the present invention, in the center of the dimple 50d having the non-equilateral octagonal concave shape, at least one protrusion 60d having the same non-equilateral octagonal shape as that of the dimple 50d is integrally provided. Thus, as the non-equilateral octagonal protrusions 60d come into contact with the head of a golf club when striking the golf ball 1 with the golf club, the golf ball 1 is prevented from being deformed and, as well, an increase in resilient force of the golf ball 1 to promote a rapid initial motion is ensured.
The protrusion constituting the dimple structure of each of the fifth and sixth embodiments of the present invention has the same structure as that of the above-mentioned first through fourth embodiments.
In
Preferably, the two protrusions are provided in each of the dimples.
Further, it is preferred that a pair of protrusions be provided in 15% to 85% of the dimples of the golf ball. Here, a plurality pairs of protrusions are evenly arranged such that the center of gravity of the golf ball exists at the same point in the golf ball regardless of the orientation of the golf ball.
Furthermore, in consideration of both air resistance when the golf ball is driven and a rolling movement of the golf ball on a putting green, preferably, the height of each protrusion is the same as or less than the depth (D) of the dimple (see,
Furthermore, the sum of the areas of the protrusions occupies 5% to 60% of the cross-sectional area (A) of the dimple (see,
The reason, why the total size of protrusions is limited within a predetermined percentage range is the same as the reason for the percentage limitation of the number of protrusions in each embodiment which was described above.
The features of the dimple structure for golf balls according to each embodiment of the present invention will be explained below in brief.
First, the dimple structure for golf balls according to the present invention is characterized by the protrusion capable of being applied to any golf ball having dimples regardless of the kind of golf ball, such as one-piece, two-piece or three-piece golf ball.
Second, the dimple structure for golf balls according to the present invention is characterized in that the protrusion can be variously shaped in the dimple of the golf ball.
Third, the dimple structure for golf balls according to the present invention is characterized in that the height of the protrusion having various shapes is the same as or less than the depth of the dimple so that the protrusion does not protrude outside the dimple.
Fourth, the dimple structure for golf balls according to the present invention is characterized in that the protrusion may be provided in each dimple of the golf ball or, alternatively, may be evenly provided in 15% to 85% of the dimples such that the center of gravity of the golf ball exists at the same point in the golf ball regardless of the orientation of the golf ball.
Fifth, the dimple structure for golf balls according to the present invention is characterized in that the protrusion has a size of 5% to 60% of the cross-sectional area of the dimple.
The present invention, which has been disclosed, is not limited to the above-mentioned embodiments or accompanied drawings, and those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
MODE FOR THE INVENTIONThe above-mentioned objects, features and advantages of the present invention will be further clarified by the following detailed description with reference to the attached drawings. Reference should now be made to the drawings, in which the same reference numerals are used throughout the different drawings to designate the same or similar components.
First, fundamental features of the present invention applied to the embodiments will be explained herein below.
A plurality of dimples, which can be variously shaped (this was explained in detail in the above-mentioned embodiments), is evenly disposed on a golf ball. Each dimple can be also provided in various sizes and depths.
The purpose of the dimple structure for golf balls according to the present invention is achieved by integrally providing the protrusions in the dimples having various shapes, sizes, and depths.
The detailed explanation of this is as follows.
As shown in
The special feature of the present invention is that at least one protrusion (in the drawing, one protrusion is shown) is integrally provided in the dimple between the outer circumferential line (a) and the inner circumferential line (b).
As shown in
In the present invention, even though a dimple has such structure, at least one protrusion can be integrally provided on the bottom of the dimple such that the protrusion is provided between the outer circumferential line (a) of the golf ball and the inner circumferential line (b) in the same manner as that described for the golf ball of
As shown in
Even in such a structure of the dimple for the golf ball, the present invention is characterized in that at least one protrusion is integrally provided in the dimple between the outer circumferential line (a) of the golf ball and the inner circumferential line (b).
In other words, the dimple structure for golf balls according to the present invention is characterized by at least one protrusion which is integrally provided in the dimple between the outer circumferential line (a) and the inner circumferential line (b) regardless of the shape, size or depth of the dimple.
In the meantime, as shown in
The protrusion of the present invention can be formed in various shapes. This is represented in
The protrusion of the present invention may have various other shapes as well as the shapes shown above.
Claims
1. A dimple structure for golf balls, comprising:
- at least one protrusion integrally provided in a dimple of a golf ball.
2. The dimple structure for golf balls according to claim 1, wherein the protrusion is provided between an outer circumferential line and an inner circumferential line between which a depth of the dimple is defined, so that the protrusion does not protrude outside the outer circumferential line.
3. The dimple structure for golf balls according to claim 1, wherein the protrusion is provided in each of a plurality of dimples of the golf ball.
4. The dimple structure for golf balls according to claim 1, wherein the protrusion is evenly provided in 15% to 85% of a plurality of dimples of the golf ball such that a center of gravity of the golf ball exists at a same point in the golf ball regardless of an orientation of the golf ball.
5. The dimple structure for golf balls according to claim 1, wherein the protrusion has a size of 5% to 60% of a surface area of the dimple.
Type: Application
Filed: Jan 5, 2005
Publication Date: May 29, 2008
Inventor: Yong-Hae Lee (Gangwon-do)
Application Number: 10/527,544
International Classification: A63B 37/00 (20060101);