JP2003290393A - Golf ball with aerodynamic surface on polyurethane cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf ball having greater lift in low speed and a lower drag in high speed. <P>SOLUTION: A dimple pattern for a golf ball 20 with a polyurethane cover 21 is disclosed. The dimple pattern has multiple sets 34, 36, 38, 40, 42, 44 and 46 of dimples, and each dimple has a different diameter. The sets 34, 36, 38, 40, 42, 44 and 46 of dimples are seven different dimples 34, 36, 38, 40, 42, 44 and 46. The dimples 34, 36, 38, 40, 42, 44 and 46 cover 86% or move of a surface 22 of the golf ball 20. The unique dimple pattern allows the golf ball 20 with the thermoset polyurethane cover 21 to have shallow dimples 34, 36, 38, 40, 42, 44 and 46 with steeper entry angles. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf ball having a thermosetting polyurethane cover, and more particularly to a dimple pattern for a golf ball having a thermosetting polyurethane cover, the dimple patterns having different sizes. And a dimple pattern having

[0002]

Golfers have realized that as early as the 1800's, golf balls with indented surfaces fly better than those with smooth surfaces. Hand-stripped Gutta Percha golf balls can be purchased until at least the 1860s, and Bramble (hump rather than dent) golf balls are 1800.
It became the mainstream from the latter half of the period until 1908. 1908
In the year, British William Taylor saw a dimple that was better and more accurate than a Brumble golf ball.
Patented for a golf ball equipped with. AG Sp
alding & Bros. purchased US rights to the patent and introduced the GLORY ball featuring the TAYLOR dumble. Until the 1970s, GLORY balls, and most other golf balls with dimples, were 336 of the same size using the same pattern, the ATTI pattern.
It had dimples. The ATTI pattern is an octahedral pattern divided into eight concentric straight lines,
It was named after the principal creator of the golf ball mold.

The last 60 years of golf ball surface innovation came only from Albert Penfold, who invented the mesh patterned golf ball for Dunlop. This pattern was invented in 1912, 1
It was accepted until the 930s.

In the 1970s, innovations in dimple patterns emerged from major golf ball manufacturers. 197
In the third year, Titleist introduced an icosahedral pattern that divides a golf ball into 20 triangular regions. An icosahedron pattern is disclosed by John Vernon Pugh in British Patent 377,354, which had dimples located on the equator of the golf ball that corresponded generally to the parting lines of the golf ball mold. . Nevertheless, the icosahedron pattern has become the dominant pattern in today's golf balls.

In the 1970's and 1980's, mathematicians at the major golf ball manufacturers concentrated their intentions on increasing the dimple surface area (area covered by dimples) of a golf ball. The dimple surface of the ATTI pattern golf ball is approximately 50%.
In the 1970s, dimple surface area was increased to be greater than 60% of the surface of a golf ball. Furthermore, the breakthrough invention increased the dimple surface by over 70%. U.S. Patent No. 4,949,97 granted to William Gobush
No. 6 discloses a golf ball with 78% dimple coverage with up to 422 dimples. 1990
In the 1980s, dimple surface area exceeding 80% coverage is found.

The number of different dimples on the surface of a golf ball also increases with surface area coverage. The ATTI pattern disclosed a dimple pattern having only one size of dimple. The number of different dimple types increased, and the three dimple types became the preferred number of different dimple types. U.S. Pat. No. 4,463 to Oka et al. Discloses a dimple pattern with four different dimple types on the surface, where the dimple-free surface cannot contain additional dimples. British Patent Application No. 2157959 by Steven Aoyama discloses dimples with five different diameters. In addition, William Gobush
Invented an Archimedes tetradecahedral pattern having dimples with eleven different diameters. “500 Year o
f Golf Balls, Antique Trade Books ”on page 189. However, dimple patterns for golf balls with multiple dimples make the golf ball commercially viable and usable by the average golfer at play. Only then will it be valuable.

Further, dimple patterns have been based on segmented shapes such as octahedron, dodecahedron and icosahedron patterns. U.S. Pat. No. 5,201,522 discloses a golf ball with a dimple pattern having a pentagonal configuration with an equivalent number of dimples. U.S. Pat.No. 4,88
No. 0,241 discloses a golf ball dimple pattern having a modified icosahedron pattern in which small triangular regions are present along the equator to provide a dimple-free equator.

[0008]

There are hundreds of patents issued for golf ball dimple patterns,
There remains room for improvement with respect to current dimple patterns, especially for golf balls with thermoset polyurethane covers. Maxfli REVOLU
TION, Maxfli HT, Titleist PROFESSINAL, Titleist TO
Golf balls with thermoset polyurethane covers like the UR PRESTIGE and Slazenger RAM 420 all compensate for the unique properties of the polyurethane material, including increased spin properties, greater resistance, and manufacturing difficulties. There is a need to. There remains a need for dimple patterns designed to maximize the aerodynamic properties of golf balls with thermoset polyurethane covers.

Accordingly, the present invention provides a golf ball that travels a longer distance by providing a novel dimple pattern that increases the lift at low speed while reducing the drag on the golf ball at high speed. With the goal.

[0010]

The present invention achieves the above objects by providing a plurality of dimple sets arranged in a pattern that covers 86% of the surface of a golf ball.

One aspect of the present invention is a dimple pattern on a golf ball having a thermosetting cover with at least a primer coated surface. The preferred thermosetting material is polyurethane, but those skilled in the art will recognize that other thermosetting materials may be used in the practice of the present invention. Golf balls include a plurality of different dimple sets mounted on a surface. The different dimple set has a different diameter than any other dimple set. The depth of each dimple of different dimple sets is 0.0060 from the chord of each dimple.
Limited to inches. The depth of each of the dimples in the different dimple sets may be between 0.0045 inches and 0.0060 inches from the chord. Each of the dimples of the plurality of different dimple sets may have an entry angle, and each of the entry angles may be between 14 and 16 degrees. Each of the dimples in the plurality of different dimple sets has an edge radius, and each of the edge radii may be between 0.020 inches and 0.050 inches.

Another aspect of the invention is a dimple pattern on a golf ball having a thermoset polyurethane cover that provides greater lift at low speeds and less drag at high speeds. Golf balls include a plurality of different dimple sets mounted on the surface of a coated thermosetting polyurethane cover. Each different dimple set has a different diameter than any other set. The plurality of different dimple sets cover at least 83% of the surface of the golf ball. The golf ball has a coefficient of lift greater than 0.18 at a Reynolds number of 70,000 and a rotation speed of 2,000 rpm, a Reynolds number of 180,000 and a rotation speed of 3,0.
It has a drag coefficient less than 0.232 at 00 rpm.

[0013]

DETAILED DESCRIPTION OF THE INVENTION As shown in FIGS. 1-3, a golf ball is generally designated by the numeral 20. The golf ball may be a one-piece, two-piece, three-piece or similar golf ball. Additionally, three-piece golf balls may have a wound layer, a solid boundary layer. The cover 21 of the golf ball 20 may be constructed of any suitable material. The preferred cover 21 is constructed of a thermosetting polyurethane material. However, one of ordinary skill in the art will recognize that other cover materials may be used without departing from the scope and spirit of the invention. Golf ball 20 may have a basecoat and / or topcoat finish.

Golf ball 20 has a surface 22.
The golf ball 20 further has an equator 24, and the first hemisphere 2
The golf ball 20 is divided into 6 and the second hemisphere 28. The first pole 30 is arranged in the first hemisphere 26 at a position of 90 degrees along the arc of latitude from the equator 24. The second pole 32 is arranged in the second hemisphere 28 at a position of 90 degrees along the arc of latitude from the equator 24.

On the surface 22 in both hemispheres 26 and 28 there are 382 dimples divided into 7 different dimple sets. First dimple set 34
Is the most abundant dimple consisting of 220 dimples in the preferred embodiment. The second dimple set 36 is the next largest number of dimples, and is composed of 100 dimples. Third dimple set 38 and fourth
The dimple set 40 is the next largest in number, and in the preferred embodiment, is composed of 20 dimples each. Fifth dimple set 42 and sixth dimple set 44
Are the next largest in number, each consisting of 10 dimples in the preferred embodiment. The seventh dimple set 46 is
It consists of only two dimples. In the preferred embodiment, 3
The 82 dimples occupy 86% of the surface 22 of the golf ball.

The two dimples of the seventh dimple set 46 are installed on each pole 30 and 32, respectively.
Each of the fifth dimple sets 42 is in the vicinity of one dimple of the seventh dimple set 46. First
Of the fifth dimple set 42 installed in the hemisphere 26
The five dimples are at the same distance from the equator 24 and the first pole 30, respectively. Fifth installed in the second hemisphere 28
The five dimples in the dimple set 42 of are the equator 2
4 and the second pole 32 are at the same distance. The dimples 42 and 46 at these poles are the golf balls 2
It occupies approximately 2% of the zero surface 22.

The dimple cross section of the fifth dimple set 42 is shown in FIG. The radius R _{5 of the} dimple 42 is about 0.072 inch (1 inch is 25.4 mm), the chord depth C ₅ is about 0.0054 inch, and the entry angle θ ₅ is about 15.7.
The edge radius ER ₅ is about 0.0336 inch. The dimple cross section of the seventh dimple set 46 is shown in FIG. The radius R _{7 of the} dimple 42 is approximately 0.0510 inches,
The chord depth C ₇ is approximately 0.0049 inches and the entry angle θ ₇
Is about 13.4 degrees and the edge radius ER ₇ is about 0.0336 inches.

The ten dimples of the sixth dimple set 44 occupy approximately 3% of the surface 22 of the golf ball 20. The five dimples of the sixth dimple set 44 installed in the first hemisphere 26 have the equator 24 and the first pole 30.
Are at the same distance from each other. The five dimples of the sixth dimple set 44 installed in the second hemisphere 28 are at the same distance from the equator 24 and the second pole 32, respectively. In addition, each of the sixth dimple set 44,
Near three different dimple sets 34, 36 and 40.

The dimple cross section of the sixth dimple set 44 is shown in FIG. The radius R _{6 of the} dimple 44 is approximately 0.0930 inches, the chord depth C ₆ is approximately 0.0051 inches, the entry angle θ ₆ is approximately 15.2 degrees, and the edge radius ER ₆ is approximately 0.
It is 0333 inches. The exceptionally large diameter of the sixth dimple set 44 allows for exceptional surface coverage of the dimple pattern of the present invention. This is contrary to the conventional belief that smaller diameters provide greater surface coverage.

All the dimples of the fourth dimple set 40 are in the vicinity of at least one of the dimples of the sixth dimple set 44. 4th dimple set 4
20 dimples of 0 are the surface 22 of the golf ball 20.
Covers approximately 2.7%. The ten dimples of the fourth dimple set 40 installed in the first hemisphere 26 have the equator 24
And the same distance from the first pole 30. The ten dimples of the fourth dimple set 40 installed in the second hemisphere 28 are at the same distance from the equator 24 and the second pole 32, respectively. In addition, each of the fourth dimple sets 40 has three different dimple sets 36, 38.
And 44.

The dimple cross section of the fourth dimple set 40 is shown in FIG. The radius R _{4 of the} dimple 40 is approximately 0.062 inches, the chord depth C ₄ is approximately 0.0052 inches, the entry angle θ ₄ is approximately 15.2 degrees, and the edge radius ER ₄ is approximately 0.03.
It is 58 inches.

All the dimples of the third dimple set 38 are in the vicinity of at least one of the dimples of the sixth dimple set 44. Third dimple set 3
20 dimples of 8 are the surface 22 of the golf ball 20.
Covers approximately 3.8%. The ten dimples of the third dimple set 38 installed in the first hemisphere 26 have the equator 24
And the same distance from the first pole 30. The ten dimples of the third dimple set 38 installed in the second hemisphere 28 are at the same distance from the equator 24 and the second pole 32, respectively. Further, each of the third dimple sets 38 has three different dimple sets 34, 36.
And in the vicinity of 40.

The dimple cross section of the third dimple set 38 is shown in FIG. The radius R _{3 of the} dimple 38 is approximately 0.074 inches, the chord depth C ₃ is approximately 0.0053 inches, the entry angle θ ₃ is approximately 15.3 degrees, and the edge radius ER ₃ is approximately 0.03.
It is 44 inches.

The 220 dimples of the first dimple set 34 have the greatest effect on the surface 22 of the golf ball 20 among the different dimple sets 34-46 due to their number, size and placement. The 220 dimples of the first dimple set 34 cover approximately 53% of the surface 22 of the golf ball 20. Each of the 110 dimples of the first dimple set 34 installed in the first hemisphere 26 is in the form of a first row 80 and a second row 82 on the equator, or as best shown in FIG. It is installed in the form of a star shape 84 around the first pole 30. Similarly, 11 of the first dimple set 34 installed in the second hemisphere 28
Each of the 0 dimples is installed in the form of a first row 90 and a second row 92 below the equator, or in the form of a star shape 94 around the second pole 32 (not shown).

The dimple cross section of the first dimple set 34 is shown in FIG. The radius R _{1 of the} dimple 34 is approximately 0.0834 inches, the chord depth C ₁ is approximately 0.0053 inches, the entry angle θ ₁ is approximately 15.3 degrees, and the edge radius ER ₁ is approximately 0.
It is 0344 inches. Unlike the use of the term “entry angle” or “edge radius” in the prior art, the edge radius defined here is the surface of the dimple (cont
Our) is a numerical value used in relation to the entry angle that separates the concave and convex segments. As shown in FIG. 4 A, 2 two Bezier curves: the first derivative and second derivative of (Bezier curve curve defined by four points),
They are made identical at the point defined by the edge radius and the entry angle. The 100 dimples of the second dimple set 36 have the next greatest effect on the surface 22 of the golf ball 20, of the different dimple sets 34-46 due to their number, size, and placement. The 100 dimples of the second dimple set 36 cover approximately 22% of the surface 22 of the golf ball 20.
Therefore, the first dimple set 34 and the second dimple set 36 are combined to form the surface 2 of the golf ball 20.
It will cover over 75% of 2. Each of the 50 dimples of the second dimple set 36 installed in the first hemisphere 26 is in the form of a third row 86 on the equator or a first pole 30.
The shape of the second pentagon 102 around or the latitude transition region 7
It is installed in the form along 0. Similarly, each of the fifty dimples of the second dimple set 36 located within the second hemisphere 28 may be in the form of a third row 96 below the equator 24 or a first dimple around the first pole 30 not shown. 2 pentagon 102a
Or a configuration along the latitude transition area 70. The dimple cross section of the second dimple set 36 is
As shown in FIG. The radius R _{2 of the} dimple 34 is about 0.079 inch, the chord depth C ₂ is about 0.0053 inch, the entry angle θ ₂ is about 15.1 degrees, and the edge radius ER ₂ is about 0.0315 inch.

As best shown in FIG. 1A, each hemisphere 26 and 28 begins with three rows from the equator 24. First row 80 and second row 82 of the first hemisphere 26, and second
The first row 90 and the second row 92 of the hemisphere 28 are composed of the first dimple set 34. The third row 96 of the first hemisphere 26 and the third row 96 of the second hemisphere 28 are composed of the second dimple set 36. This row of patterns is used to achieve greater dimple surface coverage on the golf ball 20. However, as mentioned above, conventional teaching would require that additional rows of smaller diameter dimples should be used to achieve greater surface area coverage. However, the dimple pattern of the present invention transitions from the same dimple row to the pentagonal region 98. Similar pentagonal area 98
Although not shown, a is installed around the second pole 32. The pentagonal region 98 has five pentagons 100, 102, 104, 106, and 108 extending from the first pole 30.
Have. Similar pentagons 100a, 102a, 104
a, 106 a, and 108 a extend from the second pole 32. The first pentagon 100 has a fifth dimple set 4
It consists of two. The second pentagon 102 is composed of the second dimple set 36. Third pentagon 104
Is composed of the first dimple set 34. Fourth
The pentagon 106 is also composed of the first dimple set 34. The fifth pentagon 108 is composed of the first dimple set 34 and the sixth dimple set 44. However, the larger fifth pentagon 108 'is
Pentagon 108, and third row 86 and fifth pentagon 10
Includes all dimples installed between and. The pentagonal region 98 allows for a larger surface area of the dimple pattern of the present invention.

FIG. 2B shows the five triangles 130-138 that make up the pentagonal region 98. Dashed line 140 indicates the extent of a larger pentagonal region 98 'that overlaps the latitude transition region 70.

As best shown in FIG. 1B, all dimples of third dimple set 38, fourth dimple set 40, and sixth dimple set 44 are located within latitude transition regions 70 and 72. Latitude transition area 7
0 and 72 represent the dimple pattern of the present invention in rows 80,
82,86, and lines 90,92,96 to pentagonal area 9
8 and 98a, respectively. Latitude transition area 7
Each of 0 and 72 covers a circumferential region within its latitude range of 40 to 60 degrees from the equator in its respective hemisphere 26 and 28. The first latitude transition region 70 has a polar boundary 120 from the equator 24 to the approximate latitude 60, and a substantially latitude from the equator 24.
40 has an equatorial boundary 122. Similarly, the second latitude transition region 72 has a polar boundary 120a from the equator 24 to approximately latitude 60, and an equatorial boundary 122a from the equator 24 to approximately latitude 40.

Another possible embodiment other than the dimple pattern of the present invention is shown in FIGS. Figure 1
The dimple pattern on golf ball 20a of No. 1 is 5
It has only two different dimple sets 34, 36, 40, 42 and 44. The dimple pattern on the golf ball 20b of FIG. 12 has only six different dimple sets 34, 36, 38, 40, 42 and 44.
In both the dimple patterns of the golf balls 20a and 20b, the seventh dimple set installed on the poles 30 and 32 is removed, and in the dimple pattern of the golf ball 20a, all the dimples of the third dimple set are the first. 5 dimple set 42.

The force acting on a flying golf ball is calculated by the following flight path equation.

[0031]

[Equation 1] Here, F is acting on the golf ball force, F _L is lift,
F _D is drag and G is gravity. The lift and resistance of Equation A are
It is calculated by the following formula.

[0032]

[Equation 2] Here, C _L is the lift coefficient, C _D is the drag coefficient, A is the maximum cross-sectional area of the golf ball, ρ is the air density, and v is the airspeed of the golf ball.

The drag coefficient C _D and the lift coefficient C _L may be calculated using the following equations:

[0034]

[Equation 3] The Reynolds number R is a dimensionless parameter and quantifies the ratio between the inertial force and the viscous force acting on an object moving in a fluid. Turbulence for a dimpled golf ball occurs when R becomes greater than 40,000. R
If is less than 40,000, the flow is laminar. Turbulence of air around a golf ball with dimples in flight can cause it to travel farther than a smooth golf ball.

The Reynolds number R is calculated from the following equation.

[0036]

[Equation 4] Where v is the average velocity of the golf ball, D is the diameter of the golf ball (usually 1.68 inches), ρ is the density of air (0.00238slugs / ft ³ at standard pressure), and μ is the absolute viscosity of air (at standard pressure). 3.74 × 10 ^-7 lb * sec / ft ² ). USGA approved
Reynolds number R, 180,000 at standard pressure for a golf ball having a diameter of 1.68 inches is 200 ft / s or 136 ft / s hit from the tee at the time when the golf ball is at the highest speed in flight. Corresponding to. The Reynolds number R, 70,000 at standard pressure for a USGA approved golf ball having a diameter of 1.68 inches is
It corresponds to a golf ball that is 78 ft / s or 53 ft / s at the top of the flight when the golf ball in flight has the lowest speed. Gravity increases the speed of the golf ball after it reaches the apex.

FIG. 13 shows Titleist PROFESSINAL and Titlei.
st TOUR PRESTIGE, Maxfli REVOLUTION, and Maxfli HT
The lift coefficient of the golf ball 20 provided with the dimple pattern of the present invention in comparison with URETHANE is shown. Figure 1
4 is Titleist PROFESSINAL, Titleist TOUR PRESTIG
5 shows the drag coefficient of the golf ball 20 provided with the dimple pattern of the present invention in comparison with E, Maxfli REVOLUTION, and Maxfli HT URETHANE.

All golf balls for comparative testing, including the golf ball 20 with the dimple pattern of the present invention, have a thermosetting polyurethane cover. A golf ball 20 with a dimple pattern of the present invention is incorporated herein by reference in its entirety 1999.
U.S. Patent No. 6,117,024 filed July 27, "AGol
f Ball With A Polyurethane Cover ”. The aerodynamic characteristics of the dimple pattern of the present invention provide reduced drag and greater lift, which makes it more attractive than golf balls of similar construction. It is converted into a golf ball 20 that travels a longer distance.

Compared to other golf balls having a polyurethane cover, the golf ball 20 of the present invention is the only golf ball that combines a low drag coefficient at high speed with a higher lift coefficient at low speed. Specifically, as shown in FIGS. 13 and 14, no other golf ball has a Reynolds number of 70,000 and a lift coefficient C _L greater than 0.18 and a Reynolds number of 180,000 and a drag coefficient C _D less than 0.23. For example, Titleist PROFESSINAL is the Reynolds number
While having a lift coefficient C _L greater than 0.18 at 70,000,
The drag coefficient C _D is greater than 0.23 at a Reynolds number of 180,000. Further, Maxfli REVOLUTION has a drag coefficient C _D smaller than 0.23 at a Reynolds number of 180,000, while the lift coefficient C _L is smaller than 0.18 at a Reynolds number of 70,000.

In this regard, United States Golf Ass
ociation (“USGA”) and The Royal and Ancient G
The golf rules, approved by the olf Club of Saint Andrews, set the initial velocity of a golf ball at 250 feet per second (76.
2m) (up to 2% error is allowed and the initial speed is 255 feet per second), and the total distance is 280 yards (256m) plus 6% of the total distance is 296.8 yards (6% The error may be reduced to 4%). A full description of the above golf rules can be found on the USGA web page (www.usga.
org.). Therefore, the golf ball 20
It has a dimple pattern that allows these limits to be met and not exceeded.

[Brief description of drawings]

FIG. 1 is an equatorial view of a preferred embodiment of the golf ball of the present invention.

1A is a diagram showing rows of dimples from the perspective of FIG. 1. FIG.

1B is a diagram showing a dimple transition region from the viewpoint of FIG. 1. FIG.

2 is a perspective view of the golf ball of FIG. 1. FIG.

2A is a diagram showing a continuous pentagon of dimples from the perspective of FIG. 2. FIG.

2B is a diagram showing a single enclosed pentagon of dimples from the perspective of FIG. 2. FIG.

FIG. 3 is a perspective view showing the star shape of the golf ball of FIG.

FIG. 4 is an enlarged cross-sectional view of the dimples of the first dimple set of the golf ball of the present invention.

FIG. 4A is an extracted cross-sectional view showing the definition of an entry angle.

FIG. 5 is an enlarged cross-sectional view of the dimples of the second dimple set of the golf ball of the present invention.

FIG. 6 is an enlarged cross-sectional view of the dimples of the third dimple set of the golf ball of the present invention.

FIG. 7 is an enlarged cross-sectional view of the dimples of the fourth dimple set of the golf ball of the present invention.

FIG. 8 is an enlarged cross-sectional view of the dimples of the fifth dimple set of the golf ball of the present invention.

FIG. 9 is an enlarged cross-sectional view of the dimples of the sixth dimple set of the golf ball of the present invention.

FIG. 10 is an enlarged cross-sectional view of the dimples of the seventh dimple set of the golf ball of the present invention.

FIG. 11 is a equator view of another possible embodiment of the golf ball of the present invention.

FIG. 12 is an equatorial view of another possible embodiment of the golf ball of the present invention.

FIG. 13 is a graph of lift coefficient against Reynolds number.

FIG. 14 is a graph of drag coefficient against Reynolds number.

[Explanation of symbols]

20 golf balls 21 Polyurethane cover 22 surface 34 First Dimple Set 36 Second Dimple Set 38 3rd dimple set 40 Fourth Dimple Set 42 5th dimple set 44 6th dimple set 46 7th Dimple Set

Claims (20)

[Claims] 1. A golf ball having a surface, the first plurality of dimples each having a first diameter of 0.124 × 25.4 mm, the first dimple being provided on the surface, and the first dimple being provided on the surface. A second plurality of dimples each having a second diameter greater than a radius, and a third plurality of dimples each having a third diameter greater than the second radius, the plurality of dimples being disposed on the surface; A fourth plurality of dimples each having a fourth diameter greater than the third radius, and a fifth plurality of dimples disposed on the surface and each having a fifth diameter greater than the fourth radius; It is installed above and is larger than the 5th radius above and about 0.18
And a sixth plurality of dimples each having a sixth diameter of 6 × 25.4 mm, wherein the first, second, third, fourth, fifth, and sixth dimples are the golf balls. A golf ball having a Reynolds number of 70,000 and a lift coefficient of more than 0.18 at a rotation speed of 2,000 rpm and a drag coefficient of less than 0.232 at a Reynolds number of 180,000 and a rotation speed of 3,000 rpm. 2. A golf ball having 382 dimples and having a surface, wherein the 382 dimples are:
Divided into seven different dimple sets, each of the seven different dimple sets having a different diameter than any other dimple set, wherein the 382 dimples are at least 86% of the surface of the golf ball.
A golf ball having a Reynolds number of 70,000 and a lift coefficient of more than 0.18 at a rotation speed of 2,000 rpm and a drag coefficient of less than 0.232 at a Reynolds number of 180,000 and a rotation speed of 3,000 rpm. 3. A golf ball having a thermosetting cover with a surface, each surface having a dimple disposed on the surface and having a different diameter than any other dimple set. Includes multiple different dimple sets covering at least 80% of the Reynolds number of 70,000 and a lift coefficient of greater than 0.18 at 2,000 rpm and a drag coefficient of less than 0.232 at a Reynolds number of 180,000 and 3,000 rpm. ,Golf ball. 4. A Reynolds number of 180,000 and a rotation number of 3,000
The golf ball of claim 3, having a drag coefficient at rpm of less than 0.228. 5. A Reynolds number of 70,000 and a rotation number of 2,000r
The golf ball of claim 3 having a lift coefficient in pm of greater than 0.24. 6. The thermosetting cover is a thermosetting polyurethane cover, and is 0.030 × 25.4 mm to 0.038 × 25.4 mm.
The golf ball of claim 3, having a thickness within the range of. 7. A golf ball having a surface, the first plurality of dimples each having a first diameter of 0.124 × 25.4 mm and having a first diameter of 0.124 × 25.4 mm. A second plurality of dimples each having a second diameter greater than a radius, and a third plurality of dimples each having a third diameter greater than the second radius, the plurality of dimples being disposed on the surface; A fourth plurality of dimples each having a fourth diameter greater than the third radius, and a fifth plurality of dimples disposed on the surface and each having a fifth diameter greater than the fourth radius; It is installed above and is larger than the 5th radius above and about 0.18
And a sixth plurality of dimples each having a sixth diameter of 6 × 25.4 mm, wherein the first, second, third, fourth, fifth, and sixth dimples are the golf balls. Covering at least 83% of the surface of the golf ball, the dimples of the sixth plurality located in the first hemisphere of the golf ball are equidistant from the first pole and are in the second hemisphere of the golf ball. The 6th plurality of dimples installed are equidistant from the second pole, have a Reynolds number of 70,000 and a lift coefficient of more than 0.18 at a rotation speed of 2,000 rpm, and have a Reynolds number of 180,000 and a rotation speed. A golf ball having a drag coefficient of less than 0.232 at 3,000 rpm. 8. A first plurality of dimples, each of which is disposed on the surface and has a seventh radius smaller than the first radius, the first, second, third, fourth, fifth, and fifth dimples. The golf ball of claim 7, wherein the sixth and seventh plurality of dimples cover at least 86% of the surface of the golf ball. 9. The golf ball of claim 7, wherein the sixth plurality of dimples comprises 10 dimples that cover at least 3% of the surface of the golf ball. 10. A golf ball having a surface, the first plurality of dimples each having a first diameter of 0.124 × 25.4 mm installed on the surface, and the first ball having the first plurality of dimples installed on the surface. A second plurality of dimples each having a second diameter greater than a radius, and a third plurality of dimples each having a third diameter greater than the second radius, the plurality of dimples being disposed on the surface; A fourth plurality of dimples each having a fourth diameter greater than the third radius, and a fifth plurality of dimples disposed on the surface and each having a fifth diameter greater than the fourth radius; It is installed above and is larger than the 5th radius above and about 0.18
And a sixth plurality of dimples each having a sixth diameter of 6 × 25.4 mm, wherein the first, second, third, fourth, fifth, and sixth dimples are the golf balls. Of at least 83% of the surface of the golf ball, the first plurality of dimples being located equidistant from the first pole and the third plurality of dimples being located at the first hemisphere of the golf ball. The first plurality of dimples, which are located equidistant from the first pole and the sixth plurality of dimples are located equidistant from the first pole and are installed on the second hemisphere of the golf ball, The third dimples are equidistant from the second pole, the third dimples are equidistant from the second pole, and the sixth dimples are equidistant from the second pole. Reynolds number 70,000 and a lift coefficient of more than 0.18 at 2,000 rpm, Reynolds number A golf ball having a drag coefficient of less than 0.232 at 180,000 rpm and 3,000 rpm. 11. A golf ball having a surface, the first plurality of dimples each having a first diameter of 0.124 × 25.4 mm installed on the surface, and the first ball having the first plurality of dimples installed on the surface. A second plurality of dimples each having a second diameter greater than a radius, and a third plurality of dimples each having a third diameter greater than the second radius, the plurality of dimples being disposed on the surface; A fourth plurality of dimples each having a fourth diameter greater than the third radius, and a fifth plurality of dimples disposed on the surface and each having a fifth diameter greater than the fourth radius; It is installed above and is larger than the 5th radius above and about 0.18
And a sixth plurality of dimples each having a sixth diameter of 6 × 25.4 mm, wherein the first, second, third, fourth, fifth, and sixth dimples are the golf balls. Of at least 83% of the surface of the golf ball, the first plurality of dimples being located equidistant from the first pole and the second plurality of dimples being located at the first hemisphere. The golf ball, the third plurality of dimples are located equidistant from the first pole, the third plurality of dimples are located equidistant from the first pole, and the sixth plurality of dimples are located equidistant from the first pole. The first plurality of dimples are equidistant from the second pole, the second plurality of dimples are equidistant from the second pole, and the third plurality is installed in the second hemisphere of Dimples are equidistant from the second pole, and each of the sixth plurality of dimples is
A golf ball located equidistant from the pole, having a Reynolds number of 70,000 and a lift coefficient of greater than 0.18 at a rotation speed of 2,000 rpm and having a drag coefficient of less than 0.232 at a Reynolds number of 180,000 and a rotation speed of 3,000 rpm. 12. The first plurality of dimples disposed on the first hemisphere of the golf ball are equidistant from the first pole, and the second plurality of dimples are equidistant from the first pole. The third dimples are equidistant from the first pole, the sixth dimples are equidistant from the first pole, and the seventh dimples are first distance. Of the first plurality of dimples located equidistant from the second pole and located in the second hemisphere of the golf ball are equidistant from the second pole and the second plurality of dimples are Two
Of the third plurality of dimples is equidistant from the second pole, the sixth plurality of dimples is equidistant from the second pole, and the seventh plurality of dimples is equidistant from the second pole. The golf ball of claim 8, wherein the dimples are located equidistant from the second pole. 13. A golf ball having a surface, the first plurality of dimples each having a first diameter of 0.124 × 25.4 mm and having a first diameter of 0.124 × 25.4 mm. A second plurality of dimples each having a second diameter greater than a radius, and a third plurality of dimples each having a third diameter greater than the second radius, the plurality of dimples being disposed on the surface; A fourth plurality of dimples each having a fourth diameter greater than the third radius, and a fifth plurality of dimples disposed on the surface and each having a fifth diameter greater than the fourth radius; It is installed above and is larger than the 5th radius above and about 0.18
And a sixth plurality of dimples each having a sixth diameter of 6 × 25.4 mm, wherein the first, second, third, fourth, fifth, and sixth dimples are the golf balls. A first row of dimples on at least 83% of the surface of the golf ball on either side of the equator of the golf ball, the second row of dimples on either side of the equator of the golf ball comprising a fifth plurality of dimples. Is composed of the fifth plurality of dimples, and the third row of dimples on both sides of the equator of the golf ball is composed of the fourth plurality of dimples, and the first, third, and sixth plurality of All of the dimples are located in the fourth row of dimples on both sides of the equator, have a Reynolds number of 70,000 and a lift coefficient of more than 0.18 at a rotation speed of 2,000 rpm, and have a Reynolds number of 180,000 and a rotation speed of 3,000 rpm. 0.232 yo With a low drag coefficient, golf ball. 14. All of the first, third, and sixth dimples in the first hemisphere of the golf ball are in a latitude region within 40 to 60 degrees on the equator of the golf ball. , The first in the second hemisphere of the golf ball,
The golf ball according to claim 7, wherein all of the third and sixth dimples are present in a latitude region within 40 to 60 degrees below the equator of the golf ball. 15. The golf ball of claim 7, wherein each of the sixth plurality of dimples is adjacent to at least three different plurality of dimples. 16. A golf ball having a surface, the first plurality of dimples having a first diameter of 0.124 × 25.4 mm, the dimples having a first diameter of 0.124 × 25.4 mm, and the first ball having a first diameter of 0.124 × 25.4 mm. A second plurality of dimples each having a second diameter greater than a radius, and a third plurality of dimples each having a third diameter greater than the second radius, the plurality of dimples being disposed on the surface; A fourth plurality of dimples each having a fourth diameter greater than the third radius, and a fifth plurality of dimples disposed on the surface and each having a fifth diameter greater than the fourth radius; It is installed above and is larger than the 5th radius above and about 0.18
And a sixth plurality of dimples each having a sixth diameter of 6 × 25.4 mm, wherein the first, second, third, fourth, fifth, and sixth dimples are the golf balls. Covering at least 83% of the above surface, at least one dimple is in the vicinity of four different dimples, has a Reynolds number of 70,000 and a lift coefficient of more than 0.18 at a rotation speed of 2,000 rpm, and a Reynolds number of 180,000, A golf ball having a drag coefficient smaller than 0.232 at a rotation speed of 3,000 rpm. 17. A golf ball comprising seven different sets of dimples each having a surface, the dimples having a different diameter than the other sets and disposed on the surface, the golf ball being one of the seven different sets. The dimple of the set is 0.
It has a diameter larger than 18 × 25.4 mm, covers approximately 3% of the above surface of the golf ball, is installed on the first hemisphere of the golf ball, and is 0.18 × 25.4 mm.
Each set of dimples having a larger diameter is located at the same distance from the first pole and is installed in the second hemisphere of the golf ball, which is 0.18 x 25.4 mm.
Each set of dimples having a larger diameter is located at the same distance from the second pole, has a Reynolds number of 70,000 and a lift coefficient of more than 0.18 at a rotation speed of 2,000 rpm, and a Reynolds number of 180,000, and A golf ball having a drag coefficient of less than 0.232 at a rotation speed of 3,000 rpm. 18. The golf ball of claim 17, wherein each dimple in the set with a diameter greater than 0.18 × 25.4 mm is proximate to at least three different sets of dimples. 19. The golf ball of claim 17, wherein seven different sets of dimples cover approximately 86% of the surface of the golf ball. 20. A plurality of dimple sets are included, which has a Reynolds number of 70,000, a lift coefficient of more than 0.18 at a rotation speed of 2,000 rpm, a Reynolds number of 180,000 and a rotation speed of 3,0.
A golf ball having a surface having a drag coefficient of less than 0.232 at 00 rpm.