US20080125250A1 - Inside Structure of Dimple for Golf Ball - Google Patents
Inside Structure of Dimple for Golf Ball Download PDFInfo
- Publication number
- US20080125250A1 US20080125250A1 US10/527,544 US52754405A US2008125250A1 US 20080125250 A1 US20080125250 A1 US 20080125250A1 US 52754405 A US52754405 A US 52754405A US 2008125250 A1 US2008125250 A1 US 2008125250A1
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- United States
- Prior art keywords
- golf ball
- dimple
- golf
- protrusion
- present
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/0005—Protrusions
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/0007—Non-circular dimples
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/0012—Dimple profile, i.e. cross-sectional view
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/0019—Specified dimple depth
Definitions
- 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.
- 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.
- 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.
- FIG. 1 is a partially exploded perspective view showing the conventional golf ball having the reinforcing members.
- FIG. 2 is a sectional view of the conventional golf ball having the reinforcing members.
- the conventional golf ball includes an inner core 10 having an elastic body, an outer core 20 and a cover 30 .
- the reinforcing members 40 are radially provided between the inner core 10 and the outer core 20 .
- Each reinforcing member 40 is made of metal and has a bar shape. Furthermore, a plurality of circular dimples is formed on an outer surface of the cover 30 .
- 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.
- 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.
- FIG. 3 a golf ball having a plurality of impact transmission members therein is shown as another example of prior arts unlike the golf ball of FIGS. 1 and 2 .
- FIG. 3 is a sectional view showing the golf ball having the impact transmission members therein.
- this golf ball includes a spherical inner core 10 which is positioned at the center of the golf ball and has a first core 10 a and a second core 10 b , and an outer core 20 which surrounds an outer surface of the inner core 10 .
- the golf ball further includes the impact transmission members 40 a which are placed in the outer core 20 and supported by the inner core 10 to transmit outside impact to the inner core 10 .
- the golf ball further includes a cover 30 which surrounds the outer core 20 and prevents the impact transmission members 40 a from being exposed to the outside.
- the impact transmission members 40 a 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 40 a to the first core 10 a of the inner core 10 which is placed at the center of the golf ball. At this time, the impact transmission members 40 a 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- a 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.
- 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.
- 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.
- the dimple structure for golf balls prevents the elastic inner and outer cores and the cover of the golf ball from damage.
- FIG. 1 is a partially exploded perspective view showing a conventional golf ball having a plurality of reinforcing members therein;
- FIG. 2 is a sectional view of the conventional golf ball having the reinforcing members
- FIG. 3 is a sectional view showing another conventional golf ball having a plurality of impact transmission members therein;
- FIG. 4 is a sectional view of a golf ball provided with a plurality of dimples each having therein a protrusion according to the present invention
- FIG. 5 is a sectional view showing a protrusion provided in a relatively wide dimple of a golf ball, according to the present invention.
- FIGS. 6 and 7 are sectional views showing protrusions provided in relatively small dimples of golf balls, according to the present invention.
- FIGS. 8 through 12 are sectional views showing various shapes of protrusions forming a dimple structure for golf balls, according to the present invention.
- FIG. 13 is a perspective view showing a dimple structure for a golf ball, according to a first embodiment of the present invention.
- FIG. 14 is a sectional view of the golf ball of FIG. 13 ;
- FIG. 15 is a sectional view showing a part of the golf ball to illustrate the height of the protrusion according to the first embodiment of the present invention
- FIG. 16 is a sectional view showing a part of the golf ball to illustrate the size of the protrusion according to the first embodiment of the present invention
- FIG. 17 is a perspective view showing a dimple structure for a golf ball, according to a second embodiment of the present invention.
- FIG. 18 is a sectional view of the golf ball of FIG. 17 ;
- FIG. 19 is a perspective view showing a dimple structure for a golf ball, according to a third embodiment of the present invention.
- FIG. 20 is a sectional view of the golf ball of FIG. 19 ;
- FIG. 21 is a perspective view showing a dimple structure for a golf ball, according to a fourth embodiment of the present invention.
- FIG. 22 is a sectional view of the golf ball of FIG. 21 ;
- FIG. 23 is a perspective view showing a dimple structure for a golf ball, according to a fifth embodiment of the present invention.
- FIG. 24 is a perspective view showing a dimple structure for a golf ball, according to a sixth embodiment of the present invention.
- FIG. 25 is a sectional view showing a golf ball provided with a plurality of dimples each having two protrusions therein, according to the present invention.
- FIG. 13 is a perspective view showing a dimple structure for a golf ball, according to a first embodiment of the present invention.
- FIG. 14 is a sectional view of the golf ball of FIG. 13 .
- FIG. 15 is a sectional view showing a part of the golf ball to illustrate the height of the protrusion according to the first embodiment of the present invention.
- FIG. 16 is a sectional view showing a part of the golf ball to illustrate the size of the protrusion according to the first embodiment of the present invention.
- a plurality of dimples 50 a 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 60 a which has the same circular shape as that of the dimple 50 a and is integrally provided in the dimple 50 a.
- the protrusion 60 a is not limited to the circular shape, but it may be shaped differently from the shape of the dimple 50 a . That is, the protrusion 60 a may be formed in various shapes, such as a rectangular, square, cylindrical or pyramid shape. Alternatively, several protrusions 60 a having different shapes may be simultaneously used.
- a circular protrusion 60 a is provided in each of the dimples 50 a .
- a golf ball in which a circular protrusion 60 a is provided in each dimple 50 a is suitable for golf beginners. That is, because the circular protrusions 60 a 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 60 a exist.
- the circular protrusion 60 a be provided in 15% to 85% of the dimples 50 a of the golf ball 1 .
- the circular protrusions 60 a 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 .
- the number of circular protrusions 60 a is 15% or less of the number of dimples 50 a 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.
- the number of circular protrusions 60 a is 85% or more of the number of dimples 50 a 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.
- the height of each circular protrusion 60 a is the same as or less than the depth (D) of the dimple 50 a (see, FIG. 15 ).
- each circular protrusion 60 a is positioned between an outer circumferential line (a) of the golf ball 1 and an inner circumferential line (b) without protruding outside an outer circumferential line (a) of the golf ball 1 .
- the circular protrusion 60 a has a size of 5% to 60% of a cross-sectional area (A) of the dimple 50 a (see, FIG. 16 ). This is because, if the size of the circular protrusion 60 a occupies 5% of or less than the cross-sectional area (A) of the dimple 50 a , 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 so that the resilient force of the golf ball 1 against the golf club head is not increased.
- the size of the circular protrusion 60 a occupies 60% or more of the cross-sectional area (A) of the dimple 50 a , 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, as in the description of the physical phenomenon according to the height of the protrusion 60 a.
- At least one protrusion 60 a having the same circular shape as that of the dimple 50 a is integrally provided.
- the circular protrusions 60 a 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.
- 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.
- the circular protrusions 60 a 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.
- 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.
- 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).
- FIG. 17 is a perspective view showing a dimple structure for a golf ball, according to a second embodiment of the present invention.
- FIG. 18 is a sectional view of the golf ball of FIG. 17 .
- a plurality of dimples 50 b 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 60 b which has the same elliptical shape as that of the dimple 50 b and is integrally provided in the dimple 50 b.
- the protrusion 60 b is not limited to the elliptical shape, but it may be shaped differently from the shape of the dimple 50 b . That is, the protrusion 60 b may be formed in various shapes, such as a circular, rectangular, square, cylindrical or pyramid shape. Alternatively, several protrusions 60 b having different shapes may be simultaneously used.
- the elliptical protrusion 60 b is provided in each of the dimples 50 b .
- the elliptical protrusion 60 b be provided in 15% to 85% of the dimples 50 b of the golf ball 1 .
- the elliptical protrusions 60 b 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 .
- the number of elliptical protrusions 60 b is 15% or less of the number of dimples 50 b 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 60 b is 85% or more of the number of dimples 50 b 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.
- the height of each elliptical protrusion 60 b is the same as or less than the depth (D) of the dimple 50 b (see, FIG. 15 ).
- each elliptical protrusion 60 b is positioned between an outer circumferential line (a) of the golf ball 1 and an inner circumferential line (b) without protruding outside an outer circumferential line (a) of the golf ball 1 .
- the elliptical protrusion 60 b has a size of 5% to 60% of a cross-sectional area (A) of the dimple 50 b (see, FIG. 16 ). This is because, if the size of the elliptical protrusion 60 b occupies 5% of or less than the cross-sectional area (A) of the dimple 50 b , 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, so that the resilient force of the golf ball 1 against the golf club head is not increased.
- the size of the elliptical protrusion 60 b occupies 60% or more of the cross-sectional area (A) of the dimple 50 b , 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, as in the description of the physical phenomenon according to the height of the protrusion 60 b.
- At least one protrusion 60 b having the same elliptical shape as that of the dimple 50 b is integrally provided.
- FIG. 19 is a perspective view showing a dimple structure for a golf ball, according to a third embodiment of the present invention.
- FIG. 20 is a sectional view of the golf ball of FIG. 19 .
- a plurality of dimples 50 c 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 60 c which has the same equilateral octagonal shape as that of the dimple 50 c and is integrally provided in the dimple 50 c.
- the protrusion 60 c is not limited to the equilateral octagonal shape, but it may be shaped differently from the shape of the dimple 50 c . That is, the protrusion 60 c may be formed in various shapes, such as a circular, elliptical, rectangular, square, cylindrical or pyramid shape. Alternatively, several protrusions 60 c having different shapes may be simultaneously used.
- the equilateral octagonal protrusion 60 c is provided in each of the dimples 50 c.
- the equilateral octagonal protrusion 60 c be provided in 15% to 85% of the dimples 50 c of the golf ball 1 .
- the equilateral octagonal protrusions 60 c 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 .
- the number of equilateral octagonal protrusions 60 c is 15% or less of the number of dimples 50 c 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.
- the number of equilateral octagonal protrusions 60 c is 85% or more of the number of dimples 50 c 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.
- the height of each equilateral octagonal protrusion 60 c is the same as or less than the depth (D) of the dimple 50 c (see, FIG. 15 ).
- each equilateral octagonal protrusion 60 c is positioned between an outer circumferential line (a) of the golf ball 1 and an inner circumferential line (b) without protruding outside an outer circumferential line (a) of the golf ball 1 .
- the equilateral octagonal protrusion 60 c has a size of 5% to 60% of a cross-sectional area (A) of the dimple 50 c (see, FIG. 16 ). This is because, if the size of the equilateral octagonal protrusion 60 c occupies 5% of or less than the cross-sectional area (A) of the dimple 50 c , 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, so that the resilient force of the golf ball 1 against the golf club head is not increased.
- the size of the equilateral octagonal protrusion 60 c occupies 60% or more of the cross-sectional area (A) of the dimple 50 c , 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, as in the description of the physical phenomenon according to the height of the protrusion 60 c.
- At least one protrusion 60 c having the same equilateral octagonal shape as that of the dimple 50 c is integrally provided.
- the equilateral octagonal protrusions 60 c 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.
- FIG. 21 is a perspective view showing a dimple structure for a golf ball, according to a fourth embodiment of the present invention.
- FIG. 22 is a sectional view of the golf ball of FIG. 21 .
- a plurality of dimples 50 d 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 60 d which has the same non-equilateral octagonal shape as that of the dimple 50 d and is integrally provided in the dimple 50 d.
- the protrusion 60 d is not limited to the non-equilateral octagonal shape, but it may be shaped differently from the shape of the dimple 50 d . That is, the protrusion 60 d may be formed in various shapes, such as a circular, elliptical, rectangular, square, cylindrical or pyramid shape. Alternatively, several protrusions 60 d having different shapes may be simultaneously used.
- the non-equilateral octagonal protrusion 60 d is provided in each of the dimples 50 d.
- the non-equilateral octagonal protrusion 60 d be provided in 15% to 85% of the dimples 50 d of the golf ball 1 .
- the non-equilateral octagonal protrusions 60 d 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 .
- the number of non-equilateral octagonal protrusions 60 d is 15% or less of the number of dimples 50 d 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.
- the number of non-equilateral octagonal protrusions 60 d is 85% or more of the number of dimples 50 d 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.
- the height of each non-equilateral octagonal protrusion 60 d is the same as or less than the depth (D) of the dimple 50 d (see, FIG. 15 ).
- each non-equilateral octagonal protrusion 60 d is positioned between an outer circumferential line (a) of the golf ball 1 and an inner circumferential line (b) without protruding outside an outer circumferential line (a) of the golf ball 1 .
- the non-equilateral octagonal protrusion 60 d has a size of 5% to 60% of a cross-sectional area (A) of the dimple 50 d (see, FIG. 16 ). This is because, if the size of the non-equilateral octagonal protrusion 60 d occupies 5% of or less than the cross-sectional area (A) of the dimple 50 d , 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, so that the resilient force of the golf ball 1 against the golf club head is not increased.
- the size of the non-equilateral octagonal protrusion 60 d occupies 60% or more of the cross-sectional area (A) of the dimple 50 d , 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, as in the description of the physical phenomenon according to the height of the protrusion 60 d.
- At least one protrusion 60 d having the same non-equilateral octagonal shape as that of the dimple 50 d is integrally provided.
- the non-equilateral octagonal protrusions 60 d 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.
- FIG. 23 is a perspective view showing a dimple structure for a golf ball, according to a fifth embodiment of the present invention.
- a plurality of dimples 50 e each having an equilateral hexagonal concave shape is configured on the golf ball 1 in a predetermined shape.
- the dimple structure for golf balls according to the fifth embodiment of the present invention includes at least one protrusion 60 e which has the same equilateral hexagonal shape as that of the dimple 50 e and is integrally provided in the dimple 50 e .
- the protrusion 60 e may have various shapes without being limited to the equilateral hexagonal shape.
- FIG. 24 is a perspective view showing a dimple structure for a golf ball, according to a sixth embodiment of the present invention.
- a plurality of dimples 50 f each having a non-equilateral hexagonal concave shape is configured on the golf ball 1 in a predetermined shape.
- the dimple structure for golf balls according to the sixth embodiment of the present invention includes at least one protrusion 60 f which has the same non-equilateral hexagonal shape as that of the dimple 50 f and is integrally provided in the dimple 50 f .
- the protrusion 60 f may have various shapes without being limited to the non-equilateral hexagonal shape.
- 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.
- FIG. 25 is a sectional view showing a golf ball 1 provided with a plurality of dimples each having two protrusions therein, according to the present invention.
- the two protrusions are provided in each of the dimples.
- a pair of protrusions be provided in 15% to 85% of the dimples of the golf ball.
- 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.
- the height of each protrusion is the same as or less than the depth (D) of the dimple (see, FIG. 15 ).
- the sum of the areas of the protrusions occupies 5% to 60% of the cross-sectional area (A) of the dimple (see, FIG. 16 ).
- 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.
- 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.
- 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.
- 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.
- 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.
- FIG. 4 is a sectional view of a golf ball provided with a plurality of dimples each having therein a protrusion according to the present invention.
- FIG. 5 is a sectional view showing a protrusion provided in a relatively wide dimple of a golf ball, according to the present invention.
- FIG. 6 is a sectional view showing a protrusion provided in a relatively small dimple of a golf ball, according to the present invention.
- 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.
- an outer circumferential line (a), which defines the shape and outer diameter of a golf ball 1 can be defined along an outer circumference of the golf ball 1 .
- an inner circumferential line (b), which is spaced apart from the outer circumferential line (a) by a predetermined distance (D) and connects bottoms of the dimples, can be defined in the golf ball 1 .
- the predetermined distance (D) between the outer circumferential line (a) and the inner circumferential line (b) defines the depth of each dimple.
- 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).
- an outer diameter (d) of a dimple which is defined along an outer circumferential line (a) of a golf ball is greater than a depth (D) of the dimple.
- a bottom diameter (c) of the dimple which is defined along an inner circumferential line (b) of the golf ball is also greater than the depth (D) of the dimple. Therefore, as the outer diameter (d) of the dimple increases, the bottom diameter (c) of the dimple increases along with the outer diameter (d), but on the other hand, the depth (D) of the dimple decreases. Therefore, if the outer diameter (d) of the dimple is relatively large, it may seem that the bottom of the dimple protrudes slightly from a concave surface of the dimple.
- 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 FIG. 4 .
- an outer diameter (d) of a dimple which is defined along an outer circumferential line (a) of a golf ball is short in contrast with the case of the FIG. 5
- a bottom diameter (c) of the dimple which is defined along an inner circumferential line (b) of the golf ball also becomes short.
- the bottom diameter (c) of the dimple is shorter than the depth (D) of the dimple.
- 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).
- 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.
- a bottom diameter (c) of the dimple which is defined along the inner circumferential line (b) of the golf ball is also reduced.
- a protrusion may not be formed on the center portion of the bottom of the dimple.
- a bottom diameter (e) of the protrusion may be larger than the bottom diameter (c) of the dimple.
- the protrusion of the present invention can be formed in various shapes. This is represented in FIGS. 8 through 12 .
- FIGS. 8 through 12 are sectional views showing various shapes of protrusions forming a dimple structure for golf balls, according to the present invention.
- FIG. 8 shows a cross-section of an elliptical protrusion.
- FIG. 9 shows a cross-section of a pyramidal protrusion.
- FIG. 10 shows a cross-section of protrusion having a square-pillar or cylindrical shape.
- FIG. 11 shows a cross-section of a polygonal protrusion.
- FIG. 12 shows a cross-section of one or more protrusions.
- the protrusion of the present invention may have various other shapes as well as the shapes shown above.
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Abstract
The present invention provides a dimple structure for golf balls. In the present invention, a plurality of dimples (50 a) 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 (60 a) which is integrally provided in the dimple (50 a), 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.
Description
- 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.
- Generally, 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
FIGS. 1 and 2 was proposed. -
FIG. 1 is a partially exploded perspective view showing the conventional golf ball having the reinforcing members.FIG. 2 is a sectional view of the conventional golf ball having the reinforcing members. As shown in the drawings, the conventional golf ball includes aninner core 10 having an elastic body, anouter core 20 and acover 30. The reinforcingmembers 40 are radially provided between theinner core 10 and theouter core 20. Each reinforcingmember 40 is made of metal and has a bar shape. Furthermore, a plurality of circular dimples is formed on an outer surface of thecover 30. - In the above-mentioned conventional golf ball having therein the reinforcing
members 40, because the reinforcingmembers 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 thecover 30 of the golf ball, is gathered through the reinforcingmembers 40 at theinner core 10, which is located at the center of the golf ball. At this time, the reinforcingmembers 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
FIG. 3 , a golf ball having a plurality of impact transmission members therein is shown as another example of prior arts unlike the golf ball ofFIGS. 1 and 2 . -
FIG. 3 is a sectional view showing the golf ball having the impact transmission members therein. As shown inFIG. 3 , this golf ball includes a sphericalinner core 10 which is positioned at the center of the golf ball and has afirst core 10 a and asecond core 10 b, and anouter core 20 which surrounds an outer surface of theinner core 10. The golf ball further includes theimpact transmission members 40 a which are placed in theouter core 20 and supported by theinner core 10 to transmit outside impact to theinner core 10. The golf ball further includes acover 30 which surrounds theouter core 20 and prevents theimpact transmission members 40 a from being exposed to the outside. - In the above-mentioned conventional golf ball having the
impact transmission members 40 a, because theimpact transmission members 40 a 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 thecover 30 of the golf ball, is transmitted through theimpact transmission members 40 a to thefirst core 10 a of theinner core 10 which is placed at the center of the golf ball. At this time, theimpact transmission members 40 a 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.
- Accordingly, 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.
- In 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.
- A 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.
-
FIG. 1 is a partially exploded perspective view showing a conventional golf ball having a plurality of reinforcing members therein; -
FIG. 2 is a sectional view of the conventional golf ball having the reinforcing members; -
FIG. 3 is a sectional view showing another conventional golf ball having a plurality of impact transmission members therein; -
FIG. 4 is a sectional view of a golf ball provided with a plurality of dimples each having therein a protrusion according to the present invention; -
FIG. 5 is a sectional view showing a protrusion provided in a relatively wide dimple of a golf ball, according to the present invention; -
FIGS. 6 and 7 are sectional views showing protrusions provided in relatively small dimples of golf balls, according to the present invention; -
FIGS. 8 through 12 are sectional views showing various shapes of protrusions forming a dimple structure for golf balls, according to the present invention; -
FIG. 13 is a perspective view showing a dimple structure for a golf ball, according to a first embodiment of the present invention; -
FIG. 14 is a sectional view of the golf ball ofFIG. 13 ; -
FIG. 15 is a sectional view showing a part of the golf ball to illustrate the height of the protrusion according to the first embodiment of the present invention; -
FIG. 16 is a sectional view showing a part of the golf ball to illustrate the size of the protrusion according to the first embodiment of the present invention; -
FIG. 17 is a perspective view showing a dimple structure for a golf ball, according to a second embodiment of the present invention; -
FIG. 18 is a sectional view of the golf ball ofFIG. 17 ; -
FIG. 19 is a perspective view showing a dimple structure for a golf ball, according to a third embodiment of the present invention; -
FIG. 20 is a sectional view of the golf ball ofFIG. 19 ; -
FIG. 21 is a perspective view showing a dimple structure for a golf ball, according to a fourth embodiment of the present invention; -
FIG. 22 is a sectional view of the golf ball ofFIG. 21 ; -
FIG. 23 is a perspective view showing a dimple structure for a golf ball, according to a fifth embodiment of the present invention; -
FIG. 24 is a perspective view showing a dimple structure for a golf ball, according to a sixth embodiment of the present invention; and -
FIG. 25 is a sectional view showing a golf ball provided with a plurality of dimples each having two protrusions therein, according to the present invention. - Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.
-
FIG. 13 is a perspective view showing a dimple structure for a golf ball, according to a first embodiment of the present invention.FIG. 14 is a sectional view of the golf ball ofFIG. 13 .FIG. 15 is a sectional view showing a part of the golf ball to illustrate the height of the protrusion according to the first embodiment of the present invention.FIG. 16 is a sectional view showing a part of the golf ball to illustrate the size of the protrusion according to the first embodiment of the present invention. - As shown in the drawings, a plurality of
dimples 50 a each having a circular concave shape is disposed on thegolf ball 1 in a predetermined arrangement. The dimple structure for golf balls according to the first embodiment of the present invention includes at least oneprotrusion 60 a which has the same circular shape as that of thedimple 50 a and is integrally provided in thedimple 50 a. - The
protrusion 60 a is not limited to the circular shape, but it may be shaped differently from the shape of thedimple 50 a. That is, theprotrusion 60 a may be formed in various shapes, such as a rectangular, square, cylindrical or pyramid shape. Alternatively,several protrusions 60 a having different shapes may be simultaneously used. - Preferably, a
circular protrusion 60 a is provided in each of thedimples 50 a. As such, a golf ball in which acircular protrusion 60 a is provided in eachdimple 50 a is suitable for golf beginners. That is, because thecircular protrusions 60 a 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 whichcircular protrusions 60 a 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 60 a be provided in 15% to 85% of thedimples 50 a of thegolf ball 1. Here, thecircular protrusions 60 a are evenly arranged such that the center of gravity of thegolf ball 1 exists at the same point in thegolf ball 1 regardless of the orientation of thegolf ball 1. - If the number of
circular protrusions 60 a is 15% or less of the number ofdimples 50 a of thegolf ball 1, there is little effect of increasing a contact area of an impact surface between thegolf ball 1 and the head of a golf club when striking thegolf ball 1 with the golf club. Then, the resilient force of thegolf ball 1 against the golf club head is not increased. On the other hand, if the number ofcircular protrusions 60 a is 85% or more of the number ofdimples 50 a of thegolf ball 1, because the weight of thegolf ball 1 is increased and, as well, air resistance is increased, the distance that thegolf ball 1 is driven is reduced. - A golf ball, in which the number of
circular protrusions 60 a is 15% to 50% of the number ofdimples 50 a, is suitable for expert golfers. A golf ball, in which the number ofcircular protrusions 60 a is 50% to 85% of the number ofdimples 50 a, is suitable for intermediate golfers. - This is because, in the case of a
golf ball 1 having a small number ofcircular protrusions 60 a, it is difficult for golf beginners or intermediate golfers to precisely strike the portion of the golf ball in which thecircular protrusions 60 a 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 thegolf ball 1 on a putting green, the height of eachcircular protrusion 60 a is the same as or less than the depth (D) of thedimple 50 a (see,FIG. 15 ). - In other words, as shown in
FIGS. 4 through 7 , eachcircular protrusion 60 a is positioned between an outer circumferential line (a) of thegolf ball 1 and an inner circumferential line (b) without protruding outside an outer circumferential line (a) of thegolf ball 1. - This is because, if the
circular protrusion 60 a protrudes outside thedimple 50 a (outside the outer circumferential line (a) of the golf ball 1), there are several problems, specifically, it becomes difficult to correctly strike thegolf ball 1, the distance that thegolf ball 1 is driven is reduced due to the increased air resistance, and thegolf ball 1 cannot smoothly roll on a putting green. - Furthermore, the
circular protrusion 60 a has a size of 5% to 60% of a cross-sectional area (A) of thedimple 50 a (see,FIG. 16 ). This is because, if the size of thecircular protrusion 60 a occupies 5% of or less than the cross-sectional area (A) of thedimple 50 a, there is little effect of increasing a contact area of an impact surface between thegolf ball 1 and the head of a golf club when striking thegolf ball 1 with the golf club so that the resilient force of thegolf ball 1 against the golf club head is not increased. Furthermore, if the size of thecircular protrusion 60 a occupies 60% or more of the cross-sectional area (A) of thedimple 50 a, because the weight of thegolf ball 1 is increased and, as well, air resistance is increased, the distance that thegolf ball 1 is driven is reduced, as in the description of the physical phenomenon according to the height of theprotrusion 60 a. - As such, in the present invention, in the center of the
dimple 50 a having the circular concave shape, at least oneprotrusion 60 a having the same circular shape as that of thedimple 50 a is integrally provided. Thus, as thecircular protrusions 60 a come into contact with the head of a golf club when striking thegolf ball 1 with the golf club, thegolf ball 1 is prevented from being deformed. Furthermore, because the contact surface (the impact surface) between thegolf ball 1 and the golf club head is increased, the resilient force of thegolf ball 1 is increased. - Moreover, the
circular protrusions 60 a 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 thegolf 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 thecircular protrusions 60 a 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). -
FIG. 17 is a perspective view showing a dimple structure for a golf ball, according to a second embodiment of the present invention.FIG. 18 is a sectional view of the golf ball ofFIG. 17 . - As shown in the drawings, a plurality of
dimples 50 b each having an elliptical concave shape is disposed on thegolf ball 1 in a predetermined arrangement. The dimple structure for golf balls according to the second embodiment of the present invention includes at least oneprotrusion 60 b which has the same elliptical shape as that of thedimple 50 b and is integrally provided in thedimple 50 b. - The
protrusion 60 b is not limited to the elliptical shape, but it may be shaped differently from the shape of thedimple 50 b. That is, theprotrusion 60 b may be formed in various shapes, such as a circular, rectangular, square, cylindrical or pyramid shape. Alternatively,several protrusions 60 b having different shapes may be simultaneously used. - Preferably, the
elliptical protrusion 60 b is provided in each of thedimples 50 b. - Further, it is preferred that the
elliptical protrusion 60 b be provided in 15% to 85% of thedimples 50 b of thegolf ball 1. Here, theelliptical protrusions 60 b are evenly arranged such that the center of gravity of thegolf ball 1 exists at the same point in thegolf ball 1 regardless of the orientation of thegolf ball 1. - If the number of
elliptical protrusions 60 b is 15% or less of the number ofdimples 50 b of thegolf ball 1, there is little effect of increasing a contact area of an impact surface between thegolf ball 1 and the head of a golf club when striking thegolf ball 1 with the golf club. Then, the resilient force of thegolf ball 1 against the golf club head is not increased. On the other hand, if the number ofelliptical protrusions 60 b is 85% or more of the number ofdimples 50 b of thegolf ball 1, because the weight of thegolf ball 1 is increased and, as well, air resistance is increased, the distance that thegolf 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 thegolf ball 1 on a putting green, preferably, the height of eachelliptical protrusion 60 b is the same as or less than the depth (D) of thedimple 50 b (see,FIG. 15 ). - In other words, as shown in
FIGS. 4 through 7 , eachelliptical protrusion 60 b is positioned between an outer circumferential line (a) of thegolf ball 1 and an inner circumferential line (b) without protruding outside an outer circumferential line (a) of thegolf ball 1. - This is because, if the
elliptical protrusion 60 b protrudes outside thedimple 50 b (outside of the outer circumferential line (a) of the golf ball 1), there are several problems, specifically, it becomes difficult to correctly strike thegolf ball 1, the distance that thegolf ball 1 is driven is reduced due to the increased air resistance and, thegolf ball 1 cannot smoothly roll on a putting green. - Furthermore, the
elliptical protrusion 60 b has a size of 5% to 60% of a cross-sectional area (A) of thedimple 50 b (see,FIG. 16 ). This is because, if the size of theelliptical protrusion 60 b occupies 5% of or less than the cross-sectional area (A) of thedimple 50 b, there is little effect of increasing a contact area of an impact surface between thegolf ball 1 and the head of a golf club when striking thegolf ball 1 with the golf club, so that the resilient force of thegolf ball 1 against the golf club head is not increased. Furthermore, if the size of theelliptical protrusion 60 b occupies 60% or more of the cross-sectional area (A) of thedimple 50 b, because the weight of thegolf ball 1 is increased and, as well, air resistance is increased, the distance that thegolf ball 1 is driven is reduced, as in the description of the physical phenomenon according to the height of theprotrusion 60 b. - As such, in the present invention, in the center of the
dimple 50 b having the elliptical concave shape, at least oneprotrusion 60 b having the same elliptical shape as that of thedimple 50 b is integrally provided. Thus, as theelliptical protrusions 60 b come into contact with the head of a golf club when striking thegolf ball 1 with the golf club, thegolf ball 1 is prevented from being deformed and, as well, an increase in resilient force of thegolf ball 1 to promote a rapid initial motion is ensured. -
FIG. 19 is a perspective view showing a dimple structure for a golf ball, according to a third embodiment of the present invention.FIG. 20 is a sectional view of the golf ball ofFIG. 19 . - As shown in the drawings, a plurality of
dimples 50 c each having an equilateral octagonal concave shape is disposed on thegolf ball 1 in a predetermined arrangement. The dimple structure for golf balls according to the third embodiment of the present invention includes at least oneprotrusion 60 c which has the same equilateral octagonal shape as that of thedimple 50 c and is integrally provided in thedimple 50 c. - The
protrusion 60 c is not limited to the equilateral octagonal shape, but it may be shaped differently from the shape of thedimple 50 c. That is, theprotrusion 60 c may be formed in various shapes, such as a circular, elliptical, rectangular, square, cylindrical or pyramid shape. Alternatively,several protrusions 60 c having different shapes may be simultaneously used. - Preferably, the equilateral
octagonal protrusion 60 c is provided in each of thedimples 50 c. - Further, it is preferred that the equilateral
octagonal protrusion 60 c be provided in 15% to 85% of thedimples 50 c of thegolf ball 1. Here, the equilateraloctagonal protrusions 60 c are evenly arranged such that the center of gravity of thegolf ball 1 exists at the same point in thegolf ball 1 regardless of the orientation of thegolf ball 1. - If the number of equilateral
octagonal protrusions 60 c is 15% or less of the number ofdimples 50 c of thegolf ball 1, there is little effect of increasing a contact area of an impact surface between thegolf ball 1 and the head of a golf club when striking thegolf ball 1 with the golf club. Then, the resilient force of thegolf ball 1 against the golf club head is not increased. On the other hand, if the number of equilateraloctagonal protrusions 60 c is 85% or more of the number ofdimples 50 c of thegolf ball 1, because the weight of thegolf ball 1 is increased and, as well, air resistance is increased, the distance that thegolf 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 thegolf ball 1 on a putting green, preferably, the height of each equilateraloctagonal protrusion 60 c is the same as or less than the depth (D) of thedimple 50 c (see,FIG. 15 ). - In other words, as shown in
FIGS. 4 through 7 , each equilateraloctagonal protrusion 60 c is positioned between an outer circumferential line (a) of thegolf ball 1 and an inner circumferential line (b) without protruding outside an outer circumferential line (a) of thegolf ball 1. - This is because, if the equilateral
octagonal protrusion 60 c protrudes outside thedimple 50 c (outside of the outer circumferential line (a) of the golf ball 1), there are several problems, specifically, it becomes difficult to correctly strike thegolf ball 1, the distance that thegolf ball 1 is driven is reduced due to the increased air resistance and, thegolf ball 1 cannot smoothly roll on a putting green. - Furthermore, the equilateral
octagonal protrusion 60 c has a size of 5% to 60% of a cross-sectional area (A) of thedimple 50 c (see,FIG. 16 ). This is because, if the size of the equilateraloctagonal protrusion 60 c occupies 5% of or less than the cross-sectional area (A) of thedimple 50 c, there is little effect of increasing a contact area of an impact surface between thegolf ball 1 and the head of a golf club when striking thegolf ball 1 with the golf club, so that the resilient force of thegolf ball 1 against the golf club head is not increased. Furthermore, if the size of the equilateraloctagonal protrusion 60 c occupies 60% or more of the cross-sectional area (A) of thedimple 50 c, because the weight of thegolf ball 1 is increased and, as well, air resistance is increased, the distance that thegolf ball 1 is driven is reduced, as in the description of the physical phenomenon according to the height of theprotrusion 60 c. - As such, in the present invention, on the center of the
dimple 50 c having the equilateral octagonal concave shape, at least oneprotrusion 60 c having the same equilateral octagonal shape as that of thedimple 50 c is integrally provided. Thus, as the equilateraloctagonal protrusions 60 c come into contact with the head of a golf club when striking thegolf ball 1 with the golf club, thegolf ball 1 is prevented from being deformed and, as well, an increase in resilient force of thegolf ball 1 to promote a rapid initial motion is ensured. -
FIG. 21 is a perspective view showing a dimple structure for a golf ball, according to a fourth embodiment of the present invention.FIG. 22 is a sectional view of the golf ball ofFIG. 21 . - As shown in the drawings, a plurality of
dimples 50 d each having a non-equilateral octagonal concave shape is disposed on thegolf ball 1 in a predetermined arrangement. The dimple structure for golf balls according to the fourth embodiment of the present invention includes at least oneprotrusion 60 d which has the same non-equilateral octagonal shape as that of thedimple 50 d and is integrally provided in thedimple 50 d. - The
protrusion 60 d is not limited to the non-equilateral octagonal shape, but it may be shaped differently from the shape of thedimple 50 d. That is, theprotrusion 60 d may be formed in various shapes, such as a circular, elliptical, rectangular, square, cylindrical or pyramid shape. Alternatively,several protrusions 60 d having different shapes may be simultaneously used. - Preferably, the non-equilateral
octagonal protrusion 60 d is provided in each of thedimples 50 d. - Further, it is preferred that the non-equilateral
octagonal protrusion 60 d be provided in 15% to 85% of thedimples 50 d of thegolf ball 1. Here, the non-equilateraloctagonal protrusions 60 d are evenly arranged such that the center of gravity of thegolf ball 1 exists at the same point in thegolf ball 1 regardless of the orientation of thegolf ball 1. - If the number of non-equilateral
octagonal protrusions 60 d is 15% or less of the number ofdimples 50 d of thegolf ball 1, there is little effect of increasing a contact area of an impact surface between thegolf ball 1 and the head of a golf club when striking thegolf ball 1 with the golf club. Then, the resilient force of thegolf ball 1 against the golf club head is not increased. On the other hand, if the number of non-equilateraloctagonal protrusions 60 d is 85% or more of the number ofdimples 50 d of thegolf ball 1, because the weight of thegolf ball 1 is increased and, as well, air resistance is increased, the distance that thegolf 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 thegolf ball 1 on a putting green, preferably, the height of each non-equilateraloctagonal protrusion 60 d is the same as or less than the depth (D) of thedimple 50 d (see,FIG. 15 ). - In other words, as shown in
FIGS. 4 through 7 , each non-equilateraloctagonal protrusion 60 d is positioned between an outer circumferential line (a) of thegolf ball 1 and an inner circumferential line (b) without protruding outside an outer circumferential line (a) of thegolf ball 1. - This is because, if the non-equilateral
octagonal protrusion 60 d protrudes outside thedimple 50 d (outside of the outer circumferential line (a) of the golf ball 1), there are several problems, specifically, it becomes difficult to correctly strike thegolf ball 1, the distance that thegolf ball 1 is driven is reduced due to the increased air resistance and, thegolf ball 1 cannot smoothly roll on a putting green. - Furthermore, the non-equilateral
octagonal protrusion 60 d has a size of 5% to 60% of a cross-sectional area (A) of thedimple 50 d (see,FIG. 16 ). This is because, if the size of the non-equilateraloctagonal protrusion 60 d occupies 5% of or less than the cross-sectional area (A) of thedimple 50 d, there is little effect of increasing a contact area of an impact surface between thegolf ball 1 and the head of a golf club when striking thegolf ball 1 with the golf club, so that the resilient force of thegolf ball 1 against the golf club head is not increased. Furthermore, if the size of the non-equilateraloctagonal protrusion 60 d occupies 60% or more of the cross-sectional area (A) of thedimple 50 d, because the weight of thegolf ball 1 is increased and, as well, air resistance is increased, the distance that thegolf ball 1 is driven is reduced, as in the description of the physical phenomenon according to the height of theprotrusion 60 d. - As such, in the present invention, in the center of the
dimple 50 d having the non-equilateral octagonal concave shape, at least oneprotrusion 60 d having the same non-equilateral octagonal shape as that of thedimple 50 d is integrally provided. Thus, as the non-equilateraloctagonal protrusions 60 d come into contact with the head of a golf club when striking thegolf ball 1 with the golf club, thegolf ball 1 is prevented from being deformed and, as well, an increase in resilient force of thegolf ball 1 to promote a rapid initial motion is ensured. -
FIG. 23 is a perspective view showing a dimple structure for a golf ball, according to a fifth embodiment of the present invention. A plurality ofdimples 50 e each having an equilateral hexagonal concave shape is configured on thegolf ball 1 in a predetermined shape. The dimple structure for golf balls according to the fifth embodiment of the present invention includes at least oneprotrusion 60 e which has the same equilateral hexagonal shape as that of thedimple 50 e and is integrally provided in thedimple 50 e. Here, theprotrusion 60 e may have various shapes without being limited to the equilateral hexagonal shape. -
FIG. 24 is a perspective view showing a dimple structure for a golf ball, according to a sixth embodiment of the present invention. A plurality of dimples 50 f each having a non-equilateral hexagonal concave shape is configured on thegolf ball 1 in a predetermined shape. The dimple structure for golf balls according to the sixth embodiment of the present invention includes at least one protrusion 60 f which has the same non-equilateral hexagonal shape as that of the dimple 50 f and is integrally provided in the dimple 50 f. Here, the protrusion 60 f may have various shapes without being limited to the non-equilateral hexagonal shape. - 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.
-
FIG. 25 is a sectional view showing agolf ball 1 provided with a plurality of dimples each having two protrusions therein, according to the present invention. - In
FIG. 25 , two protrusions having the same shape are provided in each dimple, but two protrusions having different shapes may be provided in each dimple. - 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,
FIG. 15 ). - Furthermore, the sum of the areas of the protrusions occupies 5% to 60% of the cross-sectional area (A) of the dimple (see,
FIG. 16 ). - 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.
- The 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.
-
FIG. 4 is a sectional view of a golf ball provided with a plurality of dimples each having therein a protrusion according to the present invention.FIG. 5 is a sectional view showing a protrusion provided in a relatively wide dimple of a golf ball, according to the present invention.FIG. 6 is a sectional view showing a protrusion provided in a relatively small dimple of a golf ball, according to the present invention. - 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
FIG. 4 , an outer circumferential line (a), which defines the shape and outer diameter of agolf ball 1, can be defined along an outer circumference of thegolf ball 1. Furthermore, an inner circumferential line (b), which is spaced apart from the outer circumferential line (a) by a predetermined distance (D) and connects bottoms of the dimples, can be defined in thegolf ball 1. Here, the predetermined distance (D) between the outer circumferential line (a) and the inner circumferential line (b) defines the depth of each dimple. - 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
FIG. 5 , in the case of existing golf balls, an outer diameter (d) of a dimple which is defined along an outer circumferential line (a) of a golf ball is greater than a depth (D) of the dimple. A bottom diameter (c) of the dimple which is defined along an inner circumferential line (b) of the golf ball is also greater than the depth (D) of the dimple. Therefore, as the outer diameter (d) of the dimple increases, the bottom diameter (c) of the dimple increases along with the outer diameter (d), but on the other hand, the depth (D) of the dimple decreases. Therefore, if the outer diameter (d) of the dimple is relatively large, it may seem that the bottom of the dimple protrudes slightly from a concave surface of the dimple. - 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
FIG. 4 . - As shown in
FIG. 6 , if an outer diameter (d) of a dimple which is defined along an outer circumferential line (a) of a golf ball is short in contrast with the case of theFIG. 5 , a bottom diameter (c) of the dimple which is defined along an inner circumferential line (b) of the golf ball also becomes short. Thus, the bottom diameter (c) of the dimple is shorter than the depth (D) of the dimple. - 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
FIG. 7 , as an outer diameter (d) of a dimple which is defined along an outer circumferential line (a) of a golf ball is reduced, a bottom diameter (c) of the dimple which is defined along the inner circumferential line (b) of the golf ball is also reduced. Then, a protrusion may not be formed on the center portion of the bottom of the dimple. In this case, a bottom diameter (e) of the protrusion may be larger than the bottom diameter (c) of the dimple. - The protrusion of the present invention can be formed in various shapes. This is represented in
FIGS. 8 through 12 . -
FIGS. 8 through 12 are sectional views showing various shapes of protrusions forming a dimple structure for golf balls, according to the present invention. In detail,FIG. 8 shows a cross-section of an elliptical protrusion.FIG. 9 shows a cross-section of a pyramidal protrusion.FIG. 10 shows a cross-section of protrusion having a square-pillar or cylindrical shape.FIG. 11 shows a cross-section of a polygonal protrusion.FIG. 12 shows a cross-section of one or more protrusions. - The protrusion of the present invention may have various other shapes as well as the shapes shown above.
Claims (5)
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.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2004-0112698 | 2004-12-27 | ||
KR1020040112698A KR100655869B1 (en) | 2004-12-27 | 2004-12-27 | The Inside Structure of Dimple for Golf Ball |
PCT/KR2005/000025 WO2006070963A1 (en) | 2004-12-27 | 2005-01-05 | The inside structure of dimple for golf ball |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080125250A1 true US20080125250A1 (en) | 2008-05-29 |
Family
ID=36615058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/527,544 Abandoned US20080125250A1 (en) | 2004-12-27 | 2005-01-05 | Inside Structure of Dimple for Golf Ball |
Country Status (4)
Country | Link |
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US (1) | US20080125250A1 (en) |
JP (1) | JP2007535971A (en) |
KR (1) | KR100655869B1 (en) |
WO (1) | WO2006070963A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100304897A1 (en) * | 2009-06-01 | 2010-12-02 | Acushnet Company | Golf ball with rotational protrusions within a dimple |
US20130123048A1 (en) * | 2009-09-09 | 2013-05-16 | Acushnet Company | Golf ball dimples having circumscribed prismatoids |
US20160375311A1 (en) * | 2015-06-25 | 2016-12-29 | Bridgestone Sports Co., Ltd. | Golf ball |
US20180056136A1 (en) * | 2016-08-29 | 2018-03-01 | Dunlop Sports Co. Ltd. | Golf ball |
US10010760B1 (en) * | 2016-07-01 | 2018-07-03 | Callaway Golf Company | Dot geometry for a golf ball surface |
US10463917B2 (en) * | 2009-03-20 | 2019-11-05 | Acushnet Company | Golf ball dimple profile |
US20190344124A1 (en) * | 2016-08-04 | 2019-11-14 | Acushnet Company | Golf ball dimple plan shape |
US10709936B2 (en) | 2010-09-30 | 2020-07-14 | Acushnet Company | Golf ball |
US10894189B2 (en) | 2010-09-30 | 2021-01-19 | Acushnet Company | Golf ball |
US11376474B2 (en) | 2010-09-30 | 2022-07-05 | Acushnet Company | Golf ball |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100753030B1 (en) * | 2006-12-06 | 2007-08-30 | 용 해 이 | Inside structure of dimple for golf ball |
WO2008069372A1 (en) * | 2006-12-06 | 2008-06-12 | Yong-Hae Lee | Inside structure of dimple for golf ball |
KR101309851B1 (en) * | 2011-10-27 | 2013-09-23 | 안명운 | golf ball |
KR101648519B1 (en) | 2015-10-12 | 2016-08-17 | (주)성형정공 | GOLF BALL with 320 piece type wing |
JP7363506B2 (en) | 2019-02-22 | 2023-10-18 | 住友ゴム工業株式会社 | Golf ball |
JP7275634B2 (en) * | 2019-02-22 | 2023-05-18 | 住友ゴム工業株式会社 | Golf ball |
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US5005838A (en) * | 1989-05-09 | 1991-04-09 | Sumitomo Rubber Industries, Ltd. | Golf ball |
US5536013A (en) * | 1993-06-23 | 1996-07-16 | Hansberger Precision Golf Incorporated | Golf ball |
US6626772B1 (en) * | 2000-06-20 | 2003-09-30 | The Top-Flite Golf Company | Golf ball with elevated dimple portions |
US7281997B2 (en) * | 2001-12-04 | 2007-10-16 | Callaway Golf Company | Golf ball with deep depressions |
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JPH08238336A (en) * | 1995-02-08 | 1996-09-17 | Hansberger Precision Golf Inc | Golf ball |
-
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- 2004-12-27 KR KR1020040112698A patent/KR100655869B1/en not_active IP Right Cessation
-
2005
- 2005-01-05 WO PCT/KR2005/000025 patent/WO2006070963A1/en active Application Filing
- 2005-01-05 US US10/527,544 patent/US20080125250A1/en not_active Abandoned
- 2005-01-05 JP JP2006550930A patent/JP2007535971A/en active Pending
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US5005838A (en) * | 1989-05-09 | 1991-04-09 | Sumitomo Rubber Industries, Ltd. | Golf ball |
US5536013A (en) * | 1993-06-23 | 1996-07-16 | Hansberger Precision Golf Incorporated | Golf ball |
US6626772B1 (en) * | 2000-06-20 | 2003-09-30 | The Top-Flite Golf Company | Golf ball with elevated dimple portions |
US7281997B2 (en) * | 2001-12-04 | 2007-10-16 | Callaway Golf Company | Golf ball with deep depressions |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10463917B2 (en) * | 2009-03-20 | 2019-11-05 | Acushnet Company | Golf ball dimple profile |
US8353789B2 (en) * | 2009-06-01 | 2013-01-15 | Acushnet Company | Golf ball with rotational protrusions within a dimple |
US20100304897A1 (en) * | 2009-06-01 | 2010-12-02 | Acushnet Company | Golf ball with rotational protrusions within a dimple |
US20130123048A1 (en) * | 2009-09-09 | 2013-05-16 | Acushnet Company | Golf ball dimples having circumscribed prismatoids |
US11707647B2 (en) | 2010-09-30 | 2023-07-25 | Acushnet Company | Golf ball |
US11376474B2 (en) | 2010-09-30 | 2022-07-05 | Acushnet Company | Golf ball |
US10894189B2 (en) | 2010-09-30 | 2021-01-19 | Acushnet Company | Golf ball |
US10709936B2 (en) | 2010-09-30 | 2020-07-14 | Acushnet Company | Golf ball |
US20160375311A1 (en) * | 2015-06-25 | 2016-12-29 | Bridgestone Sports Co., Ltd. | Golf ball |
US10183196B2 (en) * | 2015-06-25 | 2019-01-22 | Bridgestone Sports Co., Ltd. | Golf ball |
JP2017006555A (en) * | 2015-06-25 | 2017-01-12 | ブリヂストンスポーツ株式会社 | Golf ball |
US10213653B1 (en) * | 2016-07-01 | 2019-02-26 | Callaway Golf Company | Dot geometry for a golf ball surface |
US10010760B1 (en) * | 2016-07-01 | 2018-07-03 | Callaway Golf Company | Dot geometry for a golf ball surface |
US20190344124A1 (en) * | 2016-08-04 | 2019-11-14 | Acushnet Company | Golf ball dimple plan shape |
US20180056136A1 (en) * | 2016-08-29 | 2018-03-01 | Dunlop Sports Co. Ltd. | Golf ball |
Also Published As
Publication number | Publication date |
---|---|
KR20060074074A (en) | 2006-07-03 |
JP2007535971A (en) | 2007-12-13 |
KR100655869B1 (en) | 2006-12-08 |
WO2006070963A1 (en) | 2006-07-06 |
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