WO2002102472A1 - A golf ball with multiple sets of dimples - Google Patents

A golf ball with multiple sets of dimples Download PDF

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Publication number
WO2002102472A1
WO2002102472A1 PCT/US2002/012344 US0212344W WO02102472A1 WO 2002102472 A1 WO2002102472 A1 WO 2002102472A1 US 0212344 W US0212344 W US 0212344W WO 02102472 A1 WO02102472 A1 WO 02102472A1
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WO
WIPO (PCT)
Prior art keywords
dimples
golf ball
diameter
rpm
reynolds number
Prior art date
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.)
Ceased
Application number
PCT/US2002/012344
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English (en)
French (fr)
Inventor
Steven S. Ogg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Topgolf Callaway Brands Corp
Original Assignee
Callaway Golf Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Callaway Golf Co filed Critical Callaway Golf Co
Priority to GB0229801A priority Critical patent/GB2381208A/en
Publication of WO2002102472A1 publication Critical patent/WO2002102472A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • A63B37/0006—Arrangement or layout of dimples
    • A63B37/00065—Arrangement or layout of dimples located around the pole or the equator
    • 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
    • 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
    • A63B37/0018—Specified number of 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
    • A63B37/0019—Specified dimple depth
    • 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
    • A63B37/002—Specified dimple diameter
    • 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
    • A63B37/0021—Occupation ratio, i.e. percentage surface occupied by 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
    • A63B37/0022—Coatings, e.g. paint films; Markings
    • 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
    • A63B37/0023—Covers
    • A63B37/0029—Physical properties
    • A63B37/0033—Thickness
    • 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
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
    • A63B37/0075—Three piece balls, i.e. cover, intermediate layer and core
    • 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
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0077—Physical properties
    • A63B37/0087—Deflection or compression
    • 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
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0077—Physical properties
    • A63B37/0089—Coefficient of drag
    • 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
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0077—Physical properties
    • A63B37/009—Coefficient of lift
    • 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
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0077—Physical properties
    • A63B37/0084—Initial velocity

Definitions

  • the present invention relates to a golf ball. More specifically, the present invention relates to a dimple pattern for a golf ball in which the dimple pattern has different sizes of dimples .
  • Hand-hammered gutta- percha golf balls could be purchased at least by the 1860's, and golf balls with brambles (bumps rather than dents) were in style from the late 1800's to 1908.
  • brambles bump rather than dents
  • the ATTI pattern was an
  • the mathematicians of the major golf ball manufacturers focused their intention on increasing the dimpled surface area (the area covered by dimples) of a golf ball.
  • the dimpled surface for the ATTI pattern golf balls was approximately 50%.
  • the dimpled surface area was approximately 50%.
  • the number of different dimples on a golf ball surface has also increased with the surface area coverage.
  • the ATTI pattern disclosed a dimple pattern with only one size of dimple.
  • the number of different types of dimples increased, with
  • dimples for a golf ball only has value if such a golf ball is commercialized and available for the typical golfer to play.
  • dimple patterns have been based on the sectional shapes, such
  • U.S. Patent Number 4,880,241 discloses a golf ball dimple pattern having a modified icosahedron pattern wherein small triangular sections lie along the equator to provide a dimple-free equator.
  • the present invention provides a novel dimple pattern that reduces high speed drag on a golf ball while increasing its low speed lift thereby providing a golf ball that travels greater distances.
  • the present invention is able to accomplish this by providing multiples sets of dimples arranged in a pattern that covers as much as eighty-six percent of the surface of the golf ball.
  • One aspect of the present invention is a dimple pattern on a golf ball in
  • the golf ball includes first, second, third, fourth and fifth pluralities of dimples disposed on the surface. Each of the first plurality of dimples has a first diameter. Each of the
  • second plurality of dimples has a second diameter that is greater than the first
  • Each of the third plurality of dimples has a third diameter that is greater
  • Each of the fourth plurality of dimples has a fourth diameter that is greater than the third diameter.
  • Each of the fifth plurality of dimples has a fifth diameter that is greater than the fourth diameter.
  • the first, second, third, fourth and fifth pluralities of dimples cover at least eighty percent of
  • the golf ball may also include a sixth plurality of dimples disposed on the surface with each of the sixth plurality of dimples having a sixth diameter that is greater than the fifth diameter.
  • pluralities of dimples cover at least eighty-three percent of the surface of the golf ball.
  • the golf ball may further include at least one seventh dimple disposed on the surface.
  • the at least one seventh dimple has a seventh diameter that is less than the first diameter.
  • the first, second, third, fourth, fifth and sixth pluralities of dimples and the at least one seventh dimple cover at least eighty-six percent of the
  • the golf ball has an equator that divides the golf ball into a first hemisphere and a second hemisphere, and the first hemisphere may be unsymmetrical with the second hemisphere.
  • Another aspect of the present invention is a dimple pattern on a golf ball that provides greater low speed lift and lower high speed drag.
  • the different sets of dimples having a different diameter than any other set of dimples.
  • the plurality of different sets of dimples cover at least eighty-three percent of the surface of the golf ball.
  • the golf ball has a lift coefficient greater than 0.20 at a Reynolds number of 70,000 and 2000 rpm, and a drag coefficient
  • FIG. 1 is an equatorial view of a preferred embodiment of a golf ball of the
  • FIG. 1A is the view of FIG. 1 illustrating the rows of dimples.
  • FIG. IB is the view of FIG. 1 illustrating the transition region of dimples.
  • FIG. 2 is a polar view of the golf ball of FIG. 1.
  • FIG. 2A is the view of FIG. 2 illustrating the cascading pentagons of dimples.
  • FIG. 2B is the view of FIG. 2 illustrating the single encompassing pentagon of dimples.
  • FIG. 3 is a polar view of the golf ball of FIG. 1 illustrating the star configuration.
  • FIG. 4 is an enlarged cross-sectional view of a dimple of a first set of dimples of the golf ball of the present invention.
  • FIG. 4A is an isolated cross-sectional view to illustrate the definition of the entry radius.
  • FIG. 5 is an enlarged cross-sectional view of a dimple of a second set of
  • FIG. 6 is an enlarged cross-sectional view of a dimple of a third set of dimples of the golf ball of the present invention.
  • FIG. 7 is an enlarged cross-sectional view of a dimple of a fourth set of
  • FIG. 8 is an enlarged cross-sectional view of a dimple of a fifth set of dimples of the golf ball of the present invention.
  • FIG. 9 is an enlarged cross-sectional view of a dimple of a sixth set of dimples of the golf ball of the present invention.
  • FIG. 10 is an enlarged cross-sectional view of a dimple of a seventh set of
  • FIG. 11 is a polar view of an alternative embodiment of the golf ball of the present invention.
  • FIG. 12 is an equatorial view of yet another alternative embodiment of a
  • FIG. 13 is a graph of the lift coefficient versus Reynolds number.
  • FIG. 14 is a graph of the drag coefficient versus Reynolds number.
  • FIG. 15 is a graph of the average drag coefficient versus the average lift coefficient.
  • a golf ball is generally designated 20.
  • the golf ball may be a one-piece, two-piece, a three piece, or the like golf ball. Further, the three-piece golf ball may have a wound layer, or a solid boundary layer.
  • the cover
  • piece golf ball is a cover composed of a thermoset polyurethane material.
  • a preferred cover for a two-piece golf ball is a blend of ionomers.
  • the thickness of the cover for a two piece is preferably 0.070 inch, while the thickness of the cover for a three-piece golf ball is preferably 0.030 inch.
  • cover materials may be utilized without
  • the golf ball 20 may be any suitable material
  • the PGA compression of the golf ball is preferably between 70 to 110.
  • the golf ball 20 has a surface 22.
  • the golf ball 20 also has an equator 24 dividing the golf ball 20 into a first hemisphere 26 and a second hemisphere 28.
  • first pole 30 is located ninety degrees along a longitudinal arc from the equator 24 in the first hemisphere 26.
  • a second pole 32 is located ninety degrees along a longitudinal arc from the equator 24 in the second hemisphere 28.
  • a first set of dimples 34 are the
  • a second set of dimples 36 are the next most numerous dimples consisting of one-hundred dimples.
  • a third set of dimples 38 and a fourth set of dimples 40 are the next most numerous with each set 38 and 40 consisting of
  • the seventh set of dimples 46 are the next most numerous with each set 42 and 44 consisting of ten dimples in the preferred embodiment.
  • the seventh set of dimples 46 consist of only two dimples. In a preferred embodiment, the 382 dimples account for 86% of the surface 22 of the golf ball.
  • the two dimples of the seventh set of dimples 46 are each disposed on respective poles 30 and 32.
  • Each of the fifth set of dimples 42 is adjacent one of
  • the five dimples of the fifth set of dimples 42 that are disposed within the first hemisphere 26 are each an equal distance from the
  • the five dimples of the fifth set of dimples 42 that are disposed within the second hemisphere 28 are each an equal distance from the
  • FIG. 8 A cross-section of a dimple of the fifth set of dimples 42 is shown in FIG. 8.
  • the radius R 5 of the dimple 42 is approximately 0.0720 inches, the chord depth C 5
  • the entry angle ⁇ 5 is approximately 15.7 degrees
  • radius ER 7 is approximately 0.0336 inches.
  • the ten dimples of the sixth set of dimples 44 account for approximately 3% of the surface 22 of the golf ball 20.
  • the five dimples of the sixth set of dimples 44 that are disposed vvithin the first hemisphere 26 are each an equal distance from
  • the five dimples of the sixth set of dimples 44 that are disposed within the second hemisphere 28 are each an equal distance from
  • each of the sixth set of dimples 44 is adjacent to three different sets of dimples 34, 36 and 40.
  • FIG.9 A cross-section of a dimple of the sixth set of dimples 44 is shown in FIG.9.
  • the radius R ⁇ of the dimple 44 is approximately 0.0930 inches, the chord depth C 6
  • the entry angle ⁇ 6 is approximately 15.2 degrees
  • All of the fourth set of dimples 40 are adjacent to at least one of the sixth set
  • fourth set of dimples 40 that are disposed within the first hemisphere 26 are each
  • the fourth set of dimples 40 is adjacent to three different sets of dimples 36, 38 and
  • FIG. 1 A cross-section of a dimple of the fourth set of dimples 40 is shown in FIG.
  • the radius R 4 of the dimple 40 is approximately 0.062 inches, the chord depth
  • All of the third set of dimples 38 are adjacent to at least one of the sixth set of dimples 44.
  • the twenty dimples of the third set of dimples 38 cover
  • the ten dimples of the third set of dimples 38 that are disposed within the first hemisphere 26 are each an
  • the ten dimples of the third set of dimples 38 that are disposed within the second hemisphere 28 are each
  • fourth set of dimples 38 is adjacent to three different sets of dimples 34, 36 and 40.
  • a cross-section of a dimple of the third set of dimples 38 is shown in FIG. 6.
  • the radius R 3 of the dimple 38 is approximately 0.074 inches, the chord depth C 3
  • the entry angle ⁇ 3 is approximately 15.3 degrees
  • edge radius ER 3 is approximately 0.0344 inches.
  • the two-hundred twenty dimples of the first set of dimples 34 are the most influential of the different sets of dimples 34-46 due to their number, size and
  • the two-hundred twenty dimples of the first set of dimples 34 cover approximately 53% of the surface 22 of the golf ball 20.
  • the one-hundred ten dimples of the first set of dimples 34 that are
  • first hemisphere 26 disposed within the first hemisphere 26 are disposed in either a first row 80 and a second row 82 above the equator 24, or a pseudo-star configuration 84 about the first pole 30 that is best illustrated in FIG. 3.
  • dimples of the first set of dimples 34 that are disposed within the second hemisphere 28 are disposed in either a first row 90 and a second row 92 below the equator 24, or a pseudo-star configuration 94, not shown, about the second pole 32, not shown.
  • FIG. 4 A cross-section of a dimple of the first set of dimples 34 is shown in FIG. 4.
  • the radius R t of the dimple 34 is approximately 0.0834 inches, the chord depth C x
  • the entry angle ⁇ is approximately 15.3 degrees
  • edge radius ER is approximately 0.0344 inches.
  • edge radius as defined herein is a value utilized in conjunction with the entry angle to delimit the concave and convex segments of the dimple contour.
  • the one-hundred dimples of the second set of dimples 36 are the next most influential of the different sets of dimples 34-46 due to their number, size and placement on the surface 22 of the golf ball 20.
  • the one-hundred dimples of the second set of dimples 36 cover approximately 22% of the surface 22 of the golf
  • first set of dimples 34 and the second set of dimples 36 cover over approximately 75% of the surface 22 of the golf ball 20.
  • dimples of the second set of dimples 36 that are disposed within the first hemisphere 26 are disposed in either a third row 86 above the equator, a second pentagon 102 about the first pole 30, or along a transition latitudinal region 70.
  • the fifty dimples of the second set of dimples 36 that are disposed within the second hemisphere 28 are disposed in either a third row 96 below the equator
  • a second pentagon 102a not shown, about the second pole 32, or along a transition latitudinal region 72.
  • FIG. 5 A cross-section of a dimple of the second set of dimples 36 is shown in FIG. 5.
  • the radius R 2 of the dimple 36 is approximately 0.079 inches, the chord depth
  • each hemisphere 26 and 28 begins with three rows from the equator 24.
  • the hemisphere 26 and the third row 96 of the second hemisphere 28 are composed of the second set of dimples 36. This pattern of rows is utilized to achieve greater surface area coverage of the dimples on the golf ball 20.
  • This pattern of rows is utilized to achieve greater surface area coverage of the dimples on the golf ball 20.
  • the dimple pattern of the present invention transitions from rows of equal dimples into a pentagonal region 98.
  • the pentagonal region 98 is best seen in FIG. 2A.
  • a similar pentagonal region 98a, not shown, is disposed about the second pole 32.
  • the pentagonal region 98 has five pentagons 100, 102, 104, 106 and 108 expanding from the first pole 30. Similar pentagons 100a, 102a, 104a, 106a and
  • the first pentagon 100 consists of the fifth set of dimples 42.
  • the second pentagon 102 consists of the second set of dimples 36.
  • the third pentagon 104 consists of the first set of dimples 34.
  • the fourth pentagon 106 also consists of the first set of dimples 34.
  • greater fifth pentagon 108' would include the fifth pentagon 108 and all dimples disposed between the third row 86 and the fifth pentagon 108.
  • the pentagonal region 98 allows for the greater surface area of the dimple pattern of the present invention.
  • FIG. 2B illustrates five triangles 130-138 that compose the pentagonal region
  • Dashed line 140 illustrates the extent of the greater pentagonal region 98' which overlaps with the transition latitudinal region 70.
  • transition latitudinal regions 70 and 72 transition the dimple pattern of the present invention from the rows 80, 82, 86, 90, 92 and96 to the pentagonal regions 98 and 98a.
  • Each of the transition latitudinal regions 70 and 72 cover a circumferencial area between 40 to 60 longitudinal degrees from the equator 24 in their respective hemispheres 26 and 28.
  • the first transition latitudinal region 70 has a polar boundary 120 at approximately 60 longitudinal degrees from the equator 24, and an equatorial boundary 122 at approximately 40 longitudinal degrees from the equator 24.
  • the second transition latitudinal region 72 has a polar boundary 120a at approximately 60 longitudinal degrees from the equator 24, and an equatorial boundary 122a at approximately 40 longitudinal degrees from the equator 24.
  • FIGS. 11 and 12 Alternative embodiments of the dimple pattern of the present invention are illustrated in FIGS. 11 and 12.
  • the dimple pattern on the golf ball 20a of FIG. 11 only has five different sets of dimples 34, 36, 40, 42 and 44.
  • the dimple pattern on the golf ball 20b of FIG. 12 only has six different sets of dimples 34, 36, 38, 40, 42
  • the force acting on a golf ball in flight is calculated by the following trajectory equation:
  • Cf is the lift coefficient
  • Cj is the drag coefficient
  • A is the maximum
  • the drag coefficient, C ⁇ ) > and the lift coefficient, C£ t may be calculated
  • the Reynolds number R is a dimensionless parameter that quantifies the ratio
  • Turbulent flow for a dimpled golf ball occurs when R is greater than 40000. If R is less than 40000, the flow may be laminar. The turbulent flow of air about a dimpled golf ball in flight allows it to travel farther than a smooth golf ball.
  • the Reynolds number R is calculated from the following equation:
  • a Reynolds number, R of 70,000 for a golf ball having a USGA approved diameter of 1.68 inches, at standard atmospheric
  • FIG. 13 illustrates the lift coefficient of a golf ball 20 with the dimple pattern of the present invention thereon as compared to the Titlelist PROFESSIONAL, the
  • FIG. 14 illustrates the drag coefficient of a golf ball 20 with the dimple pattern of the present invention thereon as compared to the Titlelist
  • PROFESSIONAL the Titlelist TOUR PRESTIGE, the Maxfli REVOLUTION and
  • FIG. 15 illustrates the average drag coefficient versus the average lift coefficient of a golf ball 20 with the dimple pattern of the present invention thereon as compared to Titlelist PROFESSIONAL, the Titlelist TOUR PRESTIGE, the Maxfli REVOLUTION the Titlelist HP DISTANCE 202, the Titlelist HP ECLIPSE 204, the SRI Maxfli HI-BRD (from Japan) 206, the
  • Wilson CYBERCORE PRO DISTANCE 208 the Titleist PRO VI 210, the
  • the average lift coefficient is the average of
  • the dimple pattern of the present invention have a thermoset polyurethane cover.
  • the golf balls 20 with the dimple pattern of the present invention were constructed
  • the golf ball 20 As compared to other golf balls having polyurethane covers, the golf ball 20
  • FIGS. 13 and 14 none of the other golf balls have a lift coefficient, Ci t greater
  • PROFESSIONAL has a Q; greater than 0.18 at a Reynolds number of 70,000, its Cry is greater than 0.23 at a Reynolds number of 180,000. Also, while the Maxfli REVOLUTION has a drag coefficient C£t greater than 0.23 at a Reynolds number of 180,000, its CL is less than 0.18 at a Reynolds number of 70,000.
  • golf ball 20 has a dimple pattern that enables the golf ball 20 to meet, yet not

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PCT/US2002/012344 2001-04-30 2002-04-17 A golf ball with multiple sets of dimples Ceased WO2002102472A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0229801A GB2381208A (en) 2001-04-30 2002-04-17 A golf ball with multiple sets of dimples

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/846,737 US6551203B2 (en) 1999-09-16 2001-04-30 Golf ball with multiple sets of dimples
US09/846,737 2001-04-30

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US (1) US6551203B2 (enExample)
JP (1) JP2002360739A (enExample)
CN (1) CN1462199A (enExample)
GB (1) GB2381208A (enExample)
WO (1) WO2002102472A1 (enExample)

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US7179178B2 (en) * 2005-05-23 2007-02-20 Callaway Golf Company Golf ball dimple pattern
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GB2381208A (en) 2003-04-30
CN1462199A (zh) 2003-12-17

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