WO2000074794A1 - Balle de golf longue distance du type trois pieces, avec alveoles - Google Patents

Balle de golf longue distance du type trois pieces, avec alveoles Download PDF

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Publication number
WO2000074794A1
WO2000074794A1 PCT/US2000/011944 US0011944W WO0074794A1 WO 2000074794 A1 WO2000074794 A1 WO 2000074794A1 US 0011944 W US0011944 W US 0011944W WO 0074794 A1 WO0074794 A1 WO 0074794A1
Authority
WO
WIPO (PCT)
Prior art keywords
dimples
inches
golf ball
range
dimple
Prior art date
Application number
PCT/US2000/011944
Other languages
English (en)
Inventor
Matthew B. Stanczak
Sanjay M. Kuttappa
George R. Wallace
Lane D. Lemons
Original Assignee
Dunlop Maxfli Sports Corporation
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 Dunlop Maxfli Sports Corporation filed Critical Dunlop Maxfli Sports Corporation
Priority to CA002376171A priority Critical patent/CA2376171A1/fr
Priority to EP00930306A priority patent/EP1189665A4/fr
Priority to JP2001501324A priority patent/JP2003529393A/ja
Priority to AU48152/00A priority patent/AU4815200A/en
Publication of WO2000074794A1 publication Critical patent/WO2000074794A1/fr

Links

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
    • 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
    • A63B37/0011—Grooves or lines

Definitions

  • the instant invention is directed to golf balls, and more particularly to a ball having the optimal cover hardness, cover composition, size of thread
  • the core of the golf ball is the source of the ball's major elastic properties.
  • the core is comprised of the center and thread windings layer of the golf ball.
  • the core affects the ball's "feel" and its initial velocity.
  • the initial velocity is the velocity at which the golf ball travels
  • the initial velocity can be grouped with launch angle and spin to describe the ball's initial conditions, or the conditions exhibited
  • the "feel” of a ball is the sound made at impact between the ball and the club.
  • wound core and a cover of compounds based on natural balata and gutta
  • “Fade” is a term used in golf to describe a particular golf ball flight
  • Another desirable feature of balata-based compounds is that they are
  • Surlyn is an ionomeric resin that is an ionic
  • copolymer of an olefin having from about 2 to about 8 carbon atoms such as
  • dicarboxylic acid such as acrylic acid, methacrylic acid, or maleic acid.
  • Metal ions such as sodium, zinc, or
  • thermoplastic elastomer exhibiting enhanced properties such as
  • Thread wound balls with ionomer covers are less costly to manufacture
  • SURLYN ® ionomers have a flexural modulus of from about 3000 to about 7000
  • the low modulus ionomers are terpolymers, typically of ethylene,
  • methacrylic acid and n or iso-butylacrylate neutralized with sodium, zinc,
  • the low modulus ionomers can be blended with other grades of
  • Dimples are the surface indentations or depressions on a golf ball. Specifically, ball manufacturers have looked to dimple configurations in an effort to design a ball with superior distance capabilities. Dimples are the surface indentations or depressions on a golf ball. Specifically, ball manufacturers have looked to dimple configurations in an effort
  • Dimples on golf balls are typically circular in elevation cross section, but a number of other designs are also utilized, including truncated cones, dimples
  • dimples within dimples, elliptical surfaces, hemispherical (or single radius) dimples, and
  • radius dimple provides a more gradual entry of the airflow into the dimple, while a dual radius dimple provides a more abrupt entry of the airflow into the dimple.
  • single radius dimple is one in which the elevation cross sectional shape of the
  • dimple can be described by one radius, and dual radius dimple is one in which the
  • the dual radius dimple is the most optimal shape design for two-piece distance balls for providing the desired golf ball flight trajectory.
  • two-piece performance balls and three-piece distance balls are hybrid balls which behave like performance balls for certain shots and like distance balls
  • hybrid ball is used to refer to a two piece
  • performance ball a three-piece distance ball, or any other ball which behaves like a
  • dimples allows for a lower more boring trajectory for a distance two-piece ball
  • the goal is to provide a ball that (i) provides shghtly longer overall distance than a ball utilizing either all single radius dimples or all dual radius dimples, and (ii) has a significantly lower trajectory, as exhibited
  • the ball including the size and weight of the ball, the initial velocity of the ball when tested under specified conditions, the overall distance the ball travels when
  • velocity of the ball cannot be greater than 250 feet per second when tested under
  • It is still a further object of the instant invention is to provide a three-piece
  • golf ball having superior distance, trajectory and flight stability.
  • Another object of the instant invention is to provide a three-piece golf ball
  • the invention achieves the above-described objectives by providing a three-
  • piece golf ball having a sohd rubber center, a thread windings layer whose threads
  • the ball of the instant invention has a core compression in the range of 60 PGA
  • golf ball of the instant invention is based on the recognition that it is the
  • the golf ball of the present invention has a conventional, sohd rubber
  • the center or rubber sphere In a preferred embodiment of the invention, the center
  • the instant golf ball has a synthetic ionomer
  • This cover has a relatively low specific gravity and as a consequence, a
  • the thread of the golf ball of the invention is cut from a sheet that is about
  • a typical thickness is 0.024
  • windings layer comprised of a large gauge thread wound to an "open" winding
  • the cover material can be constructed from any relatively stiff material, for example, synthetic thermoplastic materials. Most notably these synthetic thermoplastic materials
  • thermoplastic materials are ionomeric resins.
  • Ionomeric resins are polymers
  • ionomeric resins are generally ionic copolymers of an olefin having from about two to about eight carbon atoms, such as ethylene and a metal salt of an unsaturated carboxylic acid, such as acryhc acid, methacrylic acid, or maleic acid.
  • the pendent is generally ionic copolymers of an olefin having from about two to about eight carbon atoms, such as ethylene and a metal salt of an unsaturated carboxylic acid, such as acryhc acid, methacrylic acid, or maleic acid.
  • ionic groups in the ionomeric resins interact to form ion-rich aggregates contained in a non-polar polymer matrix.
  • Metal ions such as sodium, zinc or magnesium
  • thermoplastic elastomer which exhibits enhanced flight characteristics
  • the ionomers used in the cover composition are sold by E.I. Dupont De Nemours & Company under the name SURLYN ® . In an attempt to overcome the
  • SURLYN ® ionomers in the early 1980's. These SURLYN ® ionomers have a
  • ionomers are terpolymers, typically of ethylene, methacrylic acid and n or iso- butylacrylate, neutralized with sodium, zinc, magnesium or lithium cations. E.I.
  • soft blends typically 52 Shore D and lower (balata-hke
  • the dimples are arranged on the surface of the golf ball based on
  • the golf ball of the instant invention has a dimple pattern that incorporates
  • dimples of different shapes to maximize the aerodynamic properties of the ball.
  • the dimple shapes may be selected from any known dimple shapes, including but not limited to truncated cones, squares, triangles, dimples within dimples, elliptical
  • dimple pattern on the surface of the ball includes both single radius and dual
  • hybrid ball is allowed to best utilize the aspects of single radius dimples for shots
  • the ball provides
  • the dimples are arranged by dividing the outer spherical surface of a golf
  • the polygonal configurations of this invention are preferably a combination of
  • plurahty of polygonal configurations is generally referred to herein as a
  • rhombicosadodecahedron The rhombicosadodecahedron is further characterized
  • the preferred embodiment utilizes a pattern of 402 dimples arranged in the
  • configurations each located on opposite sides of the outer surface, include one of
  • the outer surface has
  • the dimples are of
  • first, second and third sizes and are generally located to have a first pattern
  • the dimples are arranged over
  • Figure 1 is a cross sectional view of a three-piece golf ball made in
  • Figure 2 is an elevation view of the outer surface of a golf ball being divided
  • Figure 3 is an elevation view of the golf ball of this invention showing the
  • Figure 4 is an equatorial view of the ball of the preferred embodiment of the
  • present invention and includes polygons projected thereon.
  • Figure 5 is a polar view of the ball shown in Fig. 4 and includes polygons
  • Figure 6 is a cross sectional view of a single radius dimple
  • Figure 7 is a cross sectional view of a dual radius dimple.
  • Figure 8 is a cross sectional view cut through one of the dimples on the outer
  • the golf ball is comprised of a sohd spherical rubber
  • the sohd rubber center 6 together with the thread windings layer 4 comprise the
  • the golf ball center 6 has a
  • the thread windings layer 4 is comprised of thread cut from sheets of
  • unstressed (unwound) thread dimensions are preferably 0.024 inches thickness
  • the thread windings are
  • thread windings are wound under a tension from about 900 grams to 1100
  • the windings layer of the instant invention has a lower density than is
  • threads used in other windings is smaller, 17, or 0.017 inches.
  • the larger gauge used for the threads in the thread windings layer results in a
  • the winding conditions for the thread windings layer also contribute
  • the golf ball is wound at a tension in the
  • windings layer coupled with the heavy center produces a golf ball that is able to
  • the cover has a thickness of about 0.078 ⁇
  • the cover material is comprised of ionomer resins available from E.I. du Pont de Nemours & Co. under the name SURLYN ® .
  • SURLYN ® ionomer resins available from E.I. du Pont de Nemours & Co.
  • the ionomers are 75% by weight of SURLYN ® 8140, and
  • the hardness of the cover 2 is about 66 ⁇ 3
  • SURLYN ® ionomer is classified as a high resilience ionomer.
  • ionomer is defined as a copolymer including approximately 81% of an olefin, most commonly ethylene, and about 19% of an alpha, beta ethylenically unsaturated
  • caboxyhc acid such as acrylic or methacryhc acid.
  • this ionomer uses the Sodium metal ion to neutralize the acid groups, and, as stated, its acid level is
  • this high acid level is associated with a resin characterized by a high
  • the 8140 SURLYN ® grade has no terpolymer.
  • the 8140 SURLYN ® resin has a melt index of about 2.6.
  • the 9320W SURLYN ® resin is classified as a very low modulus ionomer
  • the 9320W SURLYN® ionomer is comprised of 67-70% by weight of ethylene, 20-21% by weight of n-butyl acrylate, and 12% by
  • the 9320W SURLYN ® resin uses the Zinc ion to neutralize the acid groups, and it is a terpolymer. Finally, the 9320W
  • SURLYN ® resin has a melt index of about 0.7.
  • the cover composition contains color
  • the preferred geometry is a rhombicosadodecahedron.
  • the dimple configuration will normally be apphed to the ball during the molding of the
  • the scope of this invention provides a golf ball mold whose molding surface contains a uniform pattern to give the golf ball a dimple
  • the invention is preferably
  • the golf ball 1 of this specification To assist in locating the dimples on the golf ball, the golf ball 1 of this specification, the golf ball 1 of this specification
  • the golf ball's outer surface 7 is illustrated in Fig. 2.
  • a polygonal configuration known as a
  • rhombicosadodecahedron is projected onto the surface of a sphere.
  • a rhombicosadodecahedron is a type of polyhedron which contains thirty (30)
  • each triangle 14 has its vertices common with three pentagon vertices.
  • the outer surface of the ball is further defined by a pair of poles and an
  • a great circle path is defined by
  • the equatorial great circle path in the preferred embodiment corresponds to a mold parting line that separates the golf ball into two hemispheres.
  • parting line is located from the poles in substantially the same manner as the
  • equator of the Earth is located from the North Pole and the South Pole.
  • the poles 70 are located at the center of a pentagon 10 on
  • mold parting line 30 is at the outer edge of the circle in this planar view of the golf ball.
  • Dimples are placed on the outer surface of the golf ball based on segments of the plurahty of polygonal configurations described above. In the preferred
  • dimples are associated with each square 12, and sixteen (16) dimples are
  • the polyhedra means that the polyhedra are used as a guide for
  • the dimple configuration of the preferred embodiment is shown in Figs. 4-5. It is based on the projection of the rhombicosadodecahedron shown in Fig. 2.
  • Dimples 200 are in the first set, dimples 202 are in the second set, and
  • dimples 204 are in the third set. Dimples are selected from all three sets to form a first pattern associated with the pentagon 10. AU sides 206 of each pentagon 10
  • All pentagons 10 have the same general first pattern arrangement of dimples.
  • Dimples 200, 202 and 204 are also used to describe the following reasons:
  • Dimples 202 from the second set of dimples form a third pattern associated
  • the mold parting hne 30 is the only dimple free
  • Radius 1 describes the shape of the bottom of the dimple.
  • the major radius governs the shape of the dimple toward the bottom of
  • Dimple size is measured by a diameter and depth generally according to the
  • Edges are defined as the distance from edge E to edge F of the dimple. Edges
  • the periphery and its continuation are substantially a smooth surface of a sphere.
  • An arc 52 is inset about 0.003
  • Tangents 53 and 53' are tangent to the dimple 6 at points E' and F' respectively
  • dimples 200 from the first set may have a diameter in the range of 0.150
  • dimples 202 from the second set may have a diameter in the
  • dimples 204 from the third set may have a
  • all dimples, 200, 202 and 204 may have a depth in the range of 0.0056 inches to 0.0078 inches; the major radius may be in the range of 0.34 inches to 0.80 inches; and the minor radius (for dimple
  • 202) may be in the range of 0.10 inches to 0.12 inches.
  • test data illustrates the improved performance of the dimple pattern of the present invention.
  • Each of the balls identified below is a hybrid ball.
  • rubber center 6 is manufactured using conventional compression molding
  • the golf ball center 6 is made of a sohd rubber
  • composition comprising a polybutadiene rubber center of a composition typical to the industry.
  • the rubber may be 90-100 PHR polybutadiene, 0-10
  • PHR polyisoprene 15-30 PHR zinc diacrylate, 3-10 PHR zinc oxide, 45-65 PHR
  • the diameter of the sohd rubber center 6 is about
  • the center 6 weighs about 28.0 ⁇ 0.5 grams, and has a compression of about 50 ⁇ 10 PGA.
  • fillers active and inactive
  • high-cis means a cis
  • sohd rubber center 6 is then wound with thread windings
  • the resultant core, 5 is then subjected to a conventional molding process according to standard methods, whereby the SURLYN ® cover 2 is compression molded around the wound core 5 in a manner
  • molding consists of injecting an ionomer mixture constituting the blended Surlyn®
  • the core is placed between two 'half shells' and
  • a golf ball mold comprising a first mold half and a second mold half, whereby each of the mold halves are larger in dimension than the finished
  • the golf balls produced may undergo further processing
  • steps such as pressure blasting, vibratory finishing, stamping of the logo
  • core size cover composition, cover hardness, cover thickness, dimple configuration,

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Cette invention se rapporte à une balle de golf du type trois pièces (1), présentant une compression de centre comprise entre environ 40 PGA et 60 PGA, un poids au centre (5) compris entre environ 27,5 grammes et 28,5 grammes, une compression de noyau (6) comprise entre environ 60 PGA et 80 PGA, un poids de noyau compris entre environ 34,5 grammes et 35,5 grammes, une dureté d'enveloppe (2) comprise entre 63 et 69 Shore D, et une composition d'enveloppe en ionomère, le mélange ionomère contenant une combinaison d'environ 75 % en poids d'un ionomère à forte élasticité et environ 25 % en poids d'un ionomère à module très bas. Cette invention se rapporte en outre à une balle de golf (1) comportant plusieurs alvéoles (200, 202, 204), au nombre d'environ 402, disposées sur sa surface extérieure, sélectionnées parmi deux groupes d'alvéoles, le premier groupe ayant une section transversale à un seul rayon et le second groupe ayant une section transversale à double rayon. La configuration des alvéoles de cette balle de golf se base sur la géométrie d'un dodécaèdre rhomboïdal. Une balle possédant ces caractéristiques présente des performances de distance supérieures sans altérer le toucher.
PCT/US2000/011944 1999-06-08 2000-05-01 Balle de golf longue distance du type trois pieces, avec alveoles WO2000074794A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002376171A CA2376171A1 (fr) 1999-06-08 2000-05-01 Balle de golf longue distance du type trois pieces, avec alveoles
EP00930306A EP1189665A4 (fr) 1999-06-08 2000-05-01 Balle de golf longue distance du type trois pieces, avec alveoles
JP2001501324A JP2003529393A (ja) 1999-06-08 2000-05-01 ディンプルを持つ３ピース距離ゴルフボール
AU48152/00A AU4815200A (en) 1999-06-08 2000-05-01 Three piece distance golf ball with dimples

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60/138,078 1999-06-06
US13807899P 1999-06-08 1999-06-08

Publications (1)

Publication Number Publication Date
WO2000074794A1 true WO2000074794A1 (fr) 2000-12-14

Family

ID=22480330

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2000/011944 WO2000074794A1 (fr) 1999-06-08 2000-05-01 Balle de golf longue distance du type trois pieces, avec alveoles
PCT/US2000/040067 WO2000074797A1 (fr) 1999-06-08 2000-06-05 Balle de golf possedant trois types d'alveoles

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US2000/040067 WO2000074797A1 (fr) 1999-06-08 2000-06-05 Balle de golf possedant trois types d'alveoles

Country Status (5)

Country Link
EP (2) EP1189665A4 (fr)
JP (2) JP2003529393A (fr)
AU (2) AU4815200A (fr)
CA (2) CA2307703A1 (fr)
WO (2) WO2000074794A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130274032A1 (en) * 2012-04-12 2013-10-17 Bridgestone Sports Co., Ltd. Golf ball

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979747A (en) 1989-12-27 1990-12-25 Wilson Sporting Goods Co. Golf ball
US5005838A (en) 1989-05-09 1991-04-09 Sumitomo Rubber Industries, Ltd. Golf ball
US5064199A (en) * 1990-01-25 1991-11-12 Taylor Made Golf Company, Inc. Golf ball
US5078402A (en) * 1988-02-27 1992-01-07 Sumitomo Rubber Industries, Ltd. Golf ball
US5092604A (en) * 1988-02-27 1992-03-03 Sumitomo Rubber Industries, Ltd. Golf ball
US5308076A (en) * 1993-01-19 1994-05-03 Sun Donald J C Golf ball with polar region uninterrupted dimples
US5441276A (en) * 1993-02-09 1995-08-15 Dong Sung Chemical Ind. Co., Ltd. Dimple pattern and the placement structure on the spherical surface of the golf ball
US5823888A (en) * 1996-05-10 1998-10-20 Bridgestone Sports Co., Ltd. Wound golf ball

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936587A (en) 1972-03-20 1990-06-26 Acushnet Company Golf ball
US5018741A (en) * 1989-07-24 1991-05-28 Spalding & Evenflo Companies, Inc. Golf ball
JPH1157067A (ja) * 1997-08-11 1999-03-02 Bridgestone Sports Co Ltd マルチピースソリッドゴルフボール

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5078402A (en) * 1988-02-27 1992-01-07 Sumitomo Rubber Industries, Ltd. Golf ball
US5092604A (en) * 1988-02-27 1992-03-03 Sumitomo Rubber Industries, Ltd. Golf ball
US5005838A (en) 1989-05-09 1991-04-09 Sumitomo Rubber Industries, Ltd. Golf ball
US4979747A (en) 1989-12-27 1990-12-25 Wilson Sporting Goods Co. Golf ball
US5064199A (en) * 1990-01-25 1991-11-12 Taylor Made Golf Company, Inc. Golf ball
US5308076A (en) * 1993-01-19 1994-05-03 Sun Donald J C Golf ball with polar region uninterrupted dimples
US5441276A (en) * 1993-02-09 1995-08-15 Dong Sung Chemical Ind. Co., Ltd. Dimple pattern and the placement structure on the spherical surface of the golf ball
US5823888A (en) * 1996-05-10 1998-10-20 Bridgestone Sports Co., Ltd. Wound golf ball

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1189665A4

Also Published As

Publication number Publication date
CA2376171A1 (fr) 2000-12-14
JP2003501173A (ja) 2003-01-14
AU5334300A (en) 2000-12-28
EP1189665A1 (fr) 2002-03-27
EP1191981A1 (fr) 2002-04-03
JP2003529393A (ja) 2003-10-07
WO2000074797A1 (fr) 2000-12-14
AU4815200A (en) 2000-12-28
EP1189665A4 (fr) 2006-02-22
EP1191981A4 (fr) 2006-02-22
CA2307703A1 (fr) 2000-12-06

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