US3784209A - Golf ball - Google Patents

Golf ball Download PDF

Info

Publication number
US3784209A
US3784209A US3784209DA US3784209A US 3784209 A US3784209 A US 3784209A US 3784209D A US3784209D A US 3784209DA US 3784209 A US3784209 A US 3784209A
Authority
US
United States
Prior art keywords
golf ball
center
weight
golf
parts
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.)
Expired - Lifetime
Application number
Inventor
A Berman
K Berman
Original Assignee
A Berman
K Berman
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 A Berman, K Berman filed Critical A Berman
Priority to US15072271A priority Critical
Application granted granted Critical
Publication of US3784209A publication Critical patent/US3784209A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls
    • A63B37/0023Covers
    • A63B37/0029Physical properties
    • A63B37/0031Hardness
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls
    • A63B37/0023Covers
    • A63B37/0029Physical properties
    • A63B37/0033Thickness
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls
    • A63B37/0038Intermediate layers, e.g. inner cover, outer core, mantle
    • A63B37/004Physical properties
    • A63B37/0043Hardness
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls
    • A63B37/007Characteristics of the ball as a whole
    • A63B37/0072Characteristics of the ball as a whole with a specified number of layers
    • A63B37/0074Two piece balls, i.e. cover and core

Abstract

One-piece, nonhomogeneous, molded golf ball is obtained by forming a center of an uncured elastomeric material, surrounding the center with a compatible but different uncured elastomeric material, and curing both elastomeric materials, such that when said materials are cured they become integral with each other to form an one-piece molded golf ball which is harder at its center than at its outer surface.

Description

United States Patent Berman, deceased et 31.

Jan. 8, 1974 GOLF BALL Inventors: Aaron Robert Berman, deceased,

late of Hatfield, Pa.; Katharine D. Berman, administratrix, Valley View Apartments 0605, King of Prussia, Pa. 19406 Filed: June 7, 1971 Appl. No.: 150,722

US. Cl 273/218, 273/217, 273/235 R Int. Cl. A63b 37/00, A63b 37/12 Field of Search 273/218, 235, 214,

References Cited UNITED STATES PATENTS 4/1967 Bartsch 273/218 2,806,824 9/1957 Semegen... 273/235 2,805,072 9/1957 Smith 273/235 B 3,239,228 3/1966 Crompton 273/218 Primary Examiner-George J. Marlo Attorney-Thomas M. Ferrill, Jr. et a1.

[57] ABSTRACT 1 Claim, No Drawings 1 GOLF BALL BACKGROUND OF THE INVENTION balls must have a diameter greater than 1.680 inches;

must weigh less than 1.620 ounces; andcannot have an initial velocity of more than 255 feet per second, as measured on a standard USGA golf ball testing machine. In addition to these required characteristics, golf balls must be round and retain their roundness even after use; mustbe well balanced fortravelin the air and on the ground and mustbe able to withstand the rigors of play without adverse physicaleffect.

For many years the wound golf ball was the standard used by all golfers. The wound golf ball, developed by Haskell prior to I900, involves the laborious winding-of elastic thread tightly around a suitable core (either solid or liquid) and then enclosing the winding within a protectivecover, such as a cover of 'a gutta-percha compound. The characteristics of the wound golf ball can be controlled by suitable selection of the core, the winding tension and the cover. Wound golf balls, however, have two major drawbacks. They areexpensive to fabricate, typically involving an eight step process which includes: core-forming, core-filling, threadmaking, thread-winding, coverstock mixing, capmaking, cover-pressing, and vulcanizing. The other major drawback of wound golf balls is theirtendency to be rendered unsatisfactory for further use due to cutting and damage of the outer, cover particularly when hit with the edge of a golf club.

In order to eliminate many of the disadvantages of the wound golf ball, a unitary golf ball composed of a homogeneous solid was developed. The homogeneous molded golf balls simplified the procedure for'making golf balls requiring only mixing, extruding, slug forming and heat molding. Although less expensive to manufacture, homogeneous golf balls have had the serious disadvantage of being substantially inflexible resulting in the golf ball fracturing when contact by a golf club is made with the golf ball. It has been estimated that a golf club head may be moving at a speed approximately I66 feet per second when striking a golf ball and that the club exerts an impact as much as 1000 pounds when the golf ball is struck.

In order to improve the playing characteristics of unitary golf balls and eliminate the shock or jolt transmitted to the player when contact by a golf club is made with a solid golf ball, an attempt was made to provide a molded and cured golf ball center with a separate cover. It was hoped that'this would result in a golf ball having a desirable combination of characteristics which would be acceptable for tournament use. Nevertheless, in spite of constant and continual efforts to produce a completely satisfactory molded golf ball, none have been successfully produced. The separately molded cover tends to fracture or separate from the golf ball center in actual use.

SUMMARY OF THE INVENTION It is an object of this invention to produce a novel one piece, non-homogeneous, molded golf ball possessing improved properties and characteristics which is cheaper to manufacture than a conventional wound golf ball. Another object of this invention is to provide an onepiece, non-homogeneous, molded golf ball having characteristics satisfactory to players while meeting the requirements necessary for tournament use.

Still another object of this invention is to produce a nonhomogeneous, molded solid golf ball having a center which is harder than its cover, as determined by durometer measurements.

In accordance with the invention, I have discovered that an one-piece, nonhomogeneous molded golf ball can be produced by '(a) forming a center of uncured elastomeric material (center material), (b) providing a cover for the center material of a compatible uncured elastomeric material (cover material), (c) enclosingthe two elastomeric materials (center and cover materials) in a mold, and (d) curing both elastomeric materials in a single operation whereby the elastomeric materials become integral with each other to form an onepiece, molded golf ball which has a center which is harder than the cover, as determined by durometer measurements.

While the compositions of each of the two elastomeric materials can be different, normally the compositions are composed of varying amounts of the same elastomer, copolymerizable monomer, polymerization initiator and filler. I-Ieatfwith pressure, is used to cure the elastomeric compositions into the form of a golf ball.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The elastomers which may be used for the center and cover of the golf ball can be the same (provided the other ingredients are different) or different (provided the elastomers are compatible). Suitable elastomers include any elastomer which is capable of being crosslinked and preferably such elastomers constitute a homopolymer, copolymer or terpolymer of butadiene,

The monomers whichcari be tised in connecthin with the aforementioned elastomers are those capable of cross-linking the aforementioned elastomers and undergoing further polymerization. Examples of such monomers include: vinyl, allyl, methallyl, furfuryl, cro- I tyl and cinnamyl esters of the following acids: oxalic, malonic, succinic, glutaric, adipic, pimelic, suberic, azelaic, sebacic, maleic, itaconic, citraconic, mesaconic, furmaric, aconitic, phthalic, isophthalic, terephthalic, naphthalic, dicarboxylic, mellitic, pyromellitic, trimesic, acrylic, methacrylic, cinnamic and crotonic.

Also suitable are polyamine amides and imides of the following acids: maleic, itaconic, acrylic, methacrylic, crotonic, citaconic, aeonitic and cinnamic; polyol esters and anhydrides of acrylic, methacrylic, crotonic and cinnamic acids. Other suitable materials include diand triallyl cyanurate; diand triallylmelamine, divinyl benzene; diallyl benzene; diallyl amine; allyl ether; allyl gycolates; di-, tri and tetravinyl and allyl silanes. Still further suitable materials are low molecular weight reactive monomers of butadiene, isoprene, chloroprene and epoxidized derivatives of these materials. The diacrylates and dimethacrylates, as for example butylene glycol dimethacrylate, are preferable though divinyl compounds, such as divinyl benzene, are also highly suitable.

The amount of the monomer must be at least percent by weight of the elastomer in order to obtain the necessary degree of cross-linking to form the required three dimensional molecular network and to give the ball its characteristics. Amounts of the cross-linking monomer used in the elastomeric composition in the center of the golf ball, as high as 90 percent by weight of the elastomer, may be used, but amounts between about 30 and 60 percent by weight of the elastomer are preferred. The amount of monomer used in the elastomeric composition at the outer surface of the golf ball may be as high as 80 percent by weight of the elastomer, but amounts between about 35 and 70 percent by weight of the elastomer are preferred.

Any known or conventional filler may be used to reinforce the elastomeric compositions. The filler should be in finely divided form, as for example in a form between about +20 and 325 and preferably +60 and 3 mesh U. S. Standard screen size. Most preferably the filler material is in the form of a silica or silicate as fillers. In addition to silica and silicate fillers, such as finely divided porous SiO alkali metal silicates, such as calcium silicate; and the like, and other fillers in addition or in place of the silica, or silicates, such as carbon black, cork, titania, cotton flock, cellulose flock, leather fiber, plastic fiber, plastic flour, leather flour; fibrous fillers, such as asbestos, glass, and synthetic fibers, metal oxides, carbonates, and talc can be used.

The amount of the filler material is dictated by its type and the type of the other constituents and may vary between about 20 and 90 percent by weight of the elastomer, and preferably and 70 percent of the elastomer. A lesser amount of filler can be used for the elastomeric composition ofthe outer portion of the golf ball.

The polymerization initiator may be any known or conventional initiator capable of causing the monomer to polymerize and cross-link. Generally, these initiators are of the free radical type, such as a peroxide, persulfate, azo compounds hydrozines, amine oxides, and the like. Peroxides, such as dicumyl peroxide and other commercially available peroxides conventionally used as polymerization catalysts may be most conveniently used.

The polymerization initiator need only be present in the catalytic amount required for this function and may be in general used in the amounts that the particular agent is generally used as a polymerization catalyst. In connection with peroxides, the same, for example, may be used in amounts of about 0.2 10 percent by weight of the elastomer.

When using the preferred components, the best results are obtained with compositions having 100 parts by weight of the cis-butadiene rubber and approximately 20 parts by weight of methacrylate ester and 30 60 parts by weight of filler.

Once the ingredients for each of the elastomeric materials have been selected, the ingredients for each elastomeric material are separately and intimately mixed together using conventional means, such as a Banbury mixer, until reasonably uniform compositions are obtained. The temperature of mixing is not critical, provided it is maintained below the curing temperature of the elastomeric materials. Normally, the uncured compatible elastomeric material, which is to provide the outer surface-of the golf ball, is placed around the inner uncured elastomeric material and the elastomeric materials are then placed in the mold.

Molding is effectd in mating precision hemisphere molds or dies whose molding surfaces are covered with multiple regular projections to give the molded golf balls conventional dimpled or waffled surface appearance for desired aerodynamic characteristics. By preportioning the material placed in the mold, the mold is fully filled when the mating halves of the mold are closed. The mold halves are then held together with a pressure above 100 pounds per square inch and preferably in the range of 300 to 1,000 psi. The molding temperature may vary, depending on the various compositions used, but is normally between about 200 and about 400 F. The molding temperature is selected to be sufficient to cure both the uncured elastomeric material in the center of the golf ball and the uncured compatible elastomeric material which surrounds the center. The nature of the elastomeric materials in the mold and the molding temperatures are so selected that both uncured elastomeric materials cure almost simultaneously, thereby forming an one-piece, molded, solid golf ball having a center which is harder than its outside surface as determined using a durometer. Optimum results are obtained in the neighborhood of 320 F., with a molding time of between ten and twenty minutes. While there is no real upper limitation on the length of the curing time, the molding should be effected until both elastomeric compositions are substantially completely cured. In general, curing times may range between about 2 and 60 minutes and preferably between about 4 and 30 minutes. Higher temperatures, i.e., temperatures above about 400 F. may be used, but are generally unnecessary and undesirable.

After the molding operation is complete, the golf ball is removed from the mold. Any mold mark, where the molds mate, may be removed by suitable means such as buffing and the golf ball is then painted and marked. Painting may be effected in the conventional manner using paint such as enamel, polyurethane, epoxy, acrylic or vinyl paints.

The finished golf ball is characterized by a diameter between 1.680 and 1.685 inches in diameter; a weight controlled between L600 and 1.620 ounces; a roundness within at least 0.01 inch; and a density within the range of L1 1 and 1.13. The hardness of the golf ball at its center is between about 65 and about and above about 30 and below about 65 at the surface of the golf ball, as measured by the Shore durometer on the "D" scale which runs from 0 for full extension to I00 for zero extension of the calibrated spring measuring instrument. Suitable-Shore durometers are illustrated in the 1968 Vanderbilt Handbook at pages 307 and 308. The compression, as measured on a standard golf ball compression test machine, is between 40 and 150 points and the golf balls bounce between about 60 and 75 percent of the height from which they are dropped in accordance with the Standard Bounce Test.

The invention will be further'illustrated by the following specific examples, it being understood that there is no intention to be necessarily limited by. any details thereof since variations can be made within the scope of the invention.

EXAMPLE 1 A suitable composition for the uncured elastomeric material used in the center of the golf ball constitutes 100 parts by weight of cisbutadiene, 62.5 parts by weight of butylene glycol dimethacrylate, 62.5 parts by weight of fine silica filler and 3.13 parts by weight of dicumyl peroxide. The ingredients are mixed thoroughly at room temperature'until the resulting material is completely homogeneous. The material (composition I) is then formed into spherical shape of suitable size.

The compatible uncured elastomeric material is also formed from a composition containing 100 parts by we ht 'v la ltasiisne qlymen wraith). w h f divinyl benzene, 65 parts by weight of fine silica filler and 3.l3 parts by weight of dicumyl peroxide. These ingredients are mixed at room temperatureuntil completely homogeneous. The resulting material (composition 2) is then placedaround the spherical shaped uncured elastomeric material of composition l as a substantially uniform layer and both compositions are placed into a precision hemisphere mold;

Moldin i cfteste at rcs ure f 9m nd smelt! temperature of 300 F. for a molding time of ten minutes. This curing operation simultaneously cures both uncured elastomeric compositions to obtain an onepiece, nonhomogeneous, molded golf ball having a hardness at the center of about 70 and a hardness on the outer surface of about 45, as determined by Shore Hardness Test on the "D scale.

After the golf ball is removed from the mold and the thin fin or flash from the moldis buffed off, the golf ball is painted and marked.

EXAMPLE ll Composition 3 A suitable composition for the uncured elastomeric material used as the center of the golf ball constitutes 100 parts by weight of cisbutadiene, 625 parts by weight of divinyl benzene, 37.5 parts by weight of fine silica, 6.2 parts by weight of cork, having a particle size below 60 mesh and 3.l3 parts by weight of dicumyl peroxide. These ingredients are mixed until the resulting composition (composition 3) is homogeneous. Composition 4 The compatible uncured elastomeric material comprises 100 parts by weight of cispolybutadiene, 50 parts by weight of diallyl benzene, 43 parts by weight of calcium silicate, and 2.95 parts by weight of dicumyl peroxide. These ingredients are thoroughly mixed until the resulting mixture-(composition 4) is homogeneous.

Composition 4 is coated inside the surface of a mating precision hemisphere mold while composition 3 is placed in the center of the hemisphere mold. The mold is then closed and curing is effected at a pressure of 130 psi at a mold temperature of 300 F. which is maintained for 12 minutes. The resulting golf ball is removed from the mold and after buffing off the thin fin, the golf ball is painted.

As an alternative to painting the golf balls, pigments (e.g., white, yellow, etc.) may be incorporated into. the

compatible uncured elastomeric material (composition 4) prior to molding. Thus, the resulting golf ball can be made perfectly white and thus does not have to be painted. This whiteness is permanent and the appearance is entirely adequate for use on practice ranges and other non-tournament play. Titanium dioxide is the preferred white pigment although other white pigments, such as barium sulphate, zinc sulfide, barium carbonate, etc., may be used. The amount of the white pigment should be different to give the molded ball its desired white appearance and in general amounts varying between 2 and 30 percent by weight of the total golf ball can be used.

Obviously, other ingredients which are compatible with the elastomeric materials employed to make the golf balls can be included to the extent that the overall characteristics of the golf ball are not adversely affected. Such other ingredients can include, for example, limited amounts of a plasticizer.

The thickness of the outersurface, having a hardness which is less than the center of the golf ball, normally will be greater than about one-sixteenth inch and less than about three-eighths inch.

. The elastomeric materials can be placed in the curing mold either separately or together, provided both are cured together.

From the foregoing, it will be seen that this invention is well adapted to obtain all of the ends and objects hereinabove set forth, together with other advantages which are obvious and which are inherent therein. The golf balls produced in accordance with the present invention are manufactured more easily and more cheaply than conventional wound golf balls. Moreover, golf balls manufactured in accordance with the present invention may be marked by simply stamping with a flat die. The golf balls are abrasive resistant and have an almost infinite shelf life. Due to their one-piece construction, they will not waterlog and .they have a superior texture and appearance. If the paint on the golf ball becomes worn or damaged, the golf ball may simply be reclaimed by removing the old paint and repainting the golf ball.

Like the best conventionally wound golf balls, the golf balls made in accordance with the present invention have all of the desirable play characteristics, including a good click" and excellent feel when the golf balls are hit with a golf club. In contrast to the homogeneous, unitary golf ball, the shock obtained when the nonhomogeneous golf ball is struck is virtually eliminated. Unlike covered wound golf balls, the golf balls of the present invention are so highly resistant to cutting that they may, for all practical purposes, be considered cut proof and indestructible in play. Like the homogeneous unitary golf ball, the golf balls in the present invention have a perfect center of gravity, excellent aerodynamic properties and superior roll characteristics. Thus, the golf balls of the present invention combine the advantageous characteristics of both the conventionally wound balls and the homogeneous unitary golf balls without the objectionable drawbacks of either type of golf ball.

als corresponding to those achieved by simultaneously curing said cover and center materials while held under pressure in direct contacting engagement with each other, the hardness of said center being between about 65 and about 95, the hardness of the cover material being above about 30 and below about 65, as measured by the Shore Hardness Test on the 0" scale, and the thickness of said softer elastomeric cover material being between about one-sixteenth and about threeeighths inch.

US3784209D 1971-06-07 1971-06-07 Golf ball Expired - Lifetime US3784209A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15072271A true 1971-06-07 1971-06-07

Publications (1)

Publication Number Publication Date
US3784209A true US3784209A (en) 1974-01-08

Family

ID=22535736

Family Applications (1)

Application Number Title Priority Date Filing Date
US3784209D Expired - Lifetime US3784209A (en) 1971-06-07 1971-06-07 Golf ball

Country Status (1)

Country Link
US (1) US3784209A (en)

Cited By (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065537A (en) * 1975-08-07 1977-12-27 Princeton Chemical Research, Inc. Process for producing molded golf balls exhibiting isometric compression
US4264075A (en) * 1975-08-07 1981-04-28 Princeton Chemical Research, Inc. Two piece molded golf ball
GB2144043A (en) * 1983-07-06 1985-02-27 Sumitomo Rubber Ind Golf ball
US4650193A (en) * 1984-12-10 1987-03-17 Spalding & Evenflo Companies, Inc. Golf ball
US4781383A (en) * 1986-02-04 1988-11-01 Kamatari Co., Ltd. Solid three-piece golf ball
US4848770A (en) * 1986-10-20 1989-07-18 Wilson Sporting Goods Co. Three-piece solid golf ball
US4858923A (en) * 1987-02-24 1989-08-22 Acushnet Company Low trajectory long distance golf ball
EP0389213A2 (en) * 1989-03-20 1990-09-26 Acushnet Company Golf balls with low spin rates
US5002281A (en) * 1989-03-01 1991-03-26 Sumitomo Rubber Industries, Ltd. Three-piece solid golf ball
US5072944A (en) * 1989-04-04 1991-12-17 Sumitomo Rubber Industries, Ltd. Three-piece solid golf ball
US5209485A (en) * 1991-09-23 1993-05-11 Lisco, Inc. Restricted flight golf ball
US5255922A (en) * 1991-07-26 1993-10-26 Wilson Sporting Goods Co. Golf ball with improved cover
US5314187A (en) * 1991-07-26 1994-05-24 Wilson Sporting Goods Co. Golf ball with improved cover
US5433447A (en) * 1994-03-25 1995-07-18 Hansberger Precision Golf Incorporated Golf ball
US5733977A (en) * 1995-03-09 1998-03-31 Sumitomo Rubber Industries, Ltd. Solid golf ball
US5833553A (en) * 1993-04-28 1998-11-10 Lisco, Inc. Golf ball
WO2000013874A1 (en) * 1998-09-03 2000-03-16 Acushnet Company Process for manufacturing multi-layered cores
US6120390A (en) * 1999-03-01 2000-09-19 Acushnet Company Golf ball cores with improved durability
US6123629A (en) * 1997-09-02 2000-09-26 Sumitomo Rubber Industries Limited Method of making a golf ball with improved flight distance and shot feeling
US6220972B1 (en) 1993-04-28 2001-04-24 Spalding Sports Worldwide, Inc. Golf ball with multi-layer cover
US6277037B1 (en) 1997-10-03 2001-08-21 Performance Dynamics Llc Golf ball with water immersion indicator
US6290797B1 (en) 1999-04-02 2001-09-18 Acushnet Company Process for making multi-layer core golf balls
US6309313B1 (en) * 1999-09-15 2001-10-30 Uniroyal Chemical Company, Inc. Low cost, resilient, shear resistant polyurethane elastomers for golf ball covers
US20020002085A1 (en) * 1997-09-18 2002-01-03 Sumitomo Rubber Industries, Ltd. Multi-piece solid golf ball and method of making the same
US6358160B1 (en) 1997-10-03 2002-03-19 Performance Dynamics Llc Golf ball with water immersion indicator
US20020169037A1 (en) * 2001-03-23 2002-11-14 Sullivan Michael J. Golf ball having a high moment of inertia and low driver spin rate
US6530849B2 (en) 1999-09-15 2003-03-11 Uniroyal Chemical Company, Inc. Low cost, resilient, shear resistant polyurethane elastomers for golf ball covers
US6596837B2 (en) 2001-03-27 2003-07-22 Acushnet Company Abrasion resistant coated golf equipment
US20030224875A1 (en) * 2002-05-30 2003-12-04 Bridgestone Sports Co., Ltd. Golf ball
US6682440B2 (en) 1993-04-28 2004-01-27 Callaway Golf Company Golf ball with multi-layer cover
US6837805B2 (en) 1993-04-28 2005-01-04 Callaway Golf Company Golf ball with multi-layer cover
US20080153629A1 (en) * 2004-05-07 2008-06-26 Sullivan Michael J Thick Outer Cover Layer Golf Ball
US7410429B1 (en) 2007-07-03 2008-08-12 Acushnet Company Negative hardness gradient inner core for dual core golf ball
US7429221B1 (en) 2007-07-03 2008-09-30 Acushnet Company Negative hardness gradient outer core layer for dual core golf ball
US20090008831A1 (en) * 2007-07-03 2009-01-08 Bulpett David A Negative Hardness Gradient Core Produced from a Low, Time-Based Cure Cycle Index
US20090011862A1 (en) * 2007-07-03 2009-01-08 Bulpett David A Golf Ball with Negative Hardness Gradient Core
US20090011866A1 (en) * 2007-07-03 2009-01-08 Sullivan Michael J Multi-Layer Core Golf Ball Having Opposing Hardness Gradient with Steep Gradient Inner Core Layer
US20090008832A1 (en) * 2007-07-03 2009-01-08 Bulpett David A Negative Hardness Gradient Core Produced from a Low, Temperature-Based Cure Cycle Index
US20090011857A1 (en) * 2007-07-03 2009-01-08 Bulpett David A Golf Ball with Negative Hardness Gradient Core
US20090011867A1 (en) * 2007-07-03 2009-01-08 Sullivan Michael J Multi-Layer Core Golf Ball Having Opposing Hardness Gradient with Steep Gradient Outer Core Layer
US20090020911A1 (en) * 2007-07-03 2009-01-22 Acushnet Company Method of Treating Rubber Composition with Cure Inihibitor to Create Soft Skin in Golf Ball Core
US20090170991A1 (en) * 2005-04-07 2009-07-02 The Goodyear Tire & Rubber Company Pneumatic tire having a rubber component containing exfoliated graphite
US20090170635A1 (en) * 2007-07-03 2009-07-02 Sullivan Michael J Golf ball layer having reduced surface hardness and method of making same
US20090253535A1 (en) * 2007-07-03 2009-10-08 Sullivan Michael J Golf ball with negative hardness gradient core
US20100087276A1 (en) * 2007-07-03 2010-04-08 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US20100160084A1 (en) * 2004-06-23 2010-06-24 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US20100160085A1 (en) * 2007-07-03 2010-06-24 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US20100160083A1 (en) * 2007-07-03 2010-06-24 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US7744490B2 (en) 2007-07-03 2010-06-29 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US20100173726A1 (en) * 2007-07-03 2010-07-08 Sullivan Michael J Golf ball having reduced surface hardness
US20100222156A1 (en) * 2007-07-03 2010-09-02 Sullivan Michael J Golf ball having reduced surface hardness
US20100227707A1 (en) * 2007-07-03 2010-09-09 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US20110077104A1 (en) * 2007-07-03 2011-03-31 Brian Comeau Multi-piece golf ball comprising low hardness gradient core
US20110092313A1 (en) * 2007-07-03 2011-04-21 Sullivan Michael J Dual-core comprising zero gradient center and positive gradient outer core layer
US7963863B2 (en) 2007-07-03 2011-06-21 Acushnet Company Golf ball with negative hardness gradient core
US8025594B2 (en) 2009-06-26 2011-09-27 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US8152653B2 (en) 2004-05-07 2012-04-10 Acushnet Company Thick inner cover multi-layer golf ball
US8197359B2 (en) 2009-06-26 2012-06-12 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US8298098B2 (en) 2007-07-03 2012-10-30 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8500575B2 (en) 2007-07-03 2013-08-06 Acushnet Company Golf ball comprising a core layer having a hardness gradient and trans gradient
US8821316B2 (en) 2007-07-03 2014-09-02 Acushnet Company Negative hardness gradient cores made of polyalkenamer rubber for golf balls
US8968117B2 (en) 2007-07-03 2015-03-03 Acushnet Company Dual-core comprising zero gradient center and positive gradient outer core layer
US9056227B2 (en) 2007-07-03 2015-06-16 Acushnet Company Golf ball comprising a core having a shallow hardness gradient
US9186556B2 (en) 2007-07-03 2015-11-17 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US9199134B2 (en) 2007-07-03 2015-12-01 Acushnet Company Method of making color golf ball and resulting color golf ball
US9238160B2 (en) 2007-07-03 2016-01-19 Acushnet Company Method of making color golf ball and resulting color golf ball
US9259619B2 (en) 2007-07-03 2016-02-16 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US9289653B2 (en) 2007-07-03 2016-03-22 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US9320944B2 (en) 2007-07-03 2016-04-26 Acushnet Company Multi-layer cover dual core golf ball having a high acid casing and low gradient center
US9480881B2 (en) 2007-07-03 2016-11-01 Acushnet Company Golf ball single layer core having a gradient quotient
US9480882B2 (en) 2007-07-03 2016-11-01 Acushnet Company Golf ball multilayer core having a gradient quotient
US9511264B2 (en) 2007-07-03 2016-12-06 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US9669263B2 (en) 2007-07-03 2017-06-06 Acushnet Company Multi-layer cover golf ball having a high acid casing layer
US9795836B2 (en) 2007-07-03 2017-10-24 Acushnet Company Golf balls comprising medium hardness gradient core
US10029151B2 (en) 2007-07-03 2018-07-24 Acushnet Company Multi-layer cover golf ball having a high acid casing layer
US10029150B2 (en) 2007-07-03 2018-07-24 Acushnet Company Golf ball having medium positive gradient quotient and low trans content
US10112081B2 (en) 2007-07-03 2018-10-30 Acushnet Company Golf ball incorporating positive hardness gradient thermoset polyurethane outer cover layer
US10130848B2 (en) 2007-07-03 2018-11-20 Acushnet Company Golf ball multilayer core having a gradient quotient
US10252115B2 (en) 2007-07-03 2019-04-09 Acushnet Company Golf ball incorporating positive hardness gradient thermoset polyurethane outer cover layer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2805072A (en) * 1955-11-10 1957-09-03 Us Rubber Co Method of toughening golf ball covers
US2806824A (en) * 1954-02-03 1957-09-17 Goodrich Co B F Composition of matter for making golf ball covers
US3239228A (en) * 1962-06-21 1966-03-08 Lord Corp Golf ball
US3313545A (en) * 1963-09-12 1967-04-11 Pcr Patent Dev Corp Unitary molded golf ball

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806824A (en) * 1954-02-03 1957-09-17 Goodrich Co B F Composition of matter for making golf ball covers
US2805072A (en) * 1955-11-10 1957-09-03 Us Rubber Co Method of toughening golf ball covers
US3239228A (en) * 1962-06-21 1966-03-08 Lord Corp Golf ball
US3313545A (en) * 1963-09-12 1967-04-11 Pcr Patent Dev Corp Unitary molded golf ball

Cited By (174)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065537A (en) * 1975-08-07 1977-12-27 Princeton Chemical Research, Inc. Process for producing molded golf balls exhibiting isometric compression
US4264075A (en) * 1975-08-07 1981-04-28 Princeton Chemical Research, Inc. Two piece molded golf ball
GB2144043A (en) * 1983-07-06 1985-02-27 Sumitomo Rubber Ind Golf ball
US4625964A (en) * 1983-07-06 1986-12-02 Sumitomo Rubber Industries, Ltd. Golf ball
US4650193A (en) * 1984-12-10 1987-03-17 Spalding & Evenflo Companies, Inc. Golf ball
US4781383A (en) * 1986-02-04 1988-11-01 Kamatari Co., Ltd. Solid three-piece golf ball
US4848770A (en) * 1986-10-20 1989-07-18 Wilson Sporting Goods Co. Three-piece solid golf ball
US4858923A (en) * 1987-02-24 1989-08-22 Acushnet Company Low trajectory long distance golf ball
US5002281A (en) * 1989-03-01 1991-03-26 Sumitomo Rubber Industries, Ltd. Three-piece solid golf ball
EP0389213A2 (en) * 1989-03-20 1990-09-26 Acushnet Company Golf balls with low spin rates
EP0389213A3 (en) * 1989-03-20 1991-09-11 Acushnet Company Golf balls with low spin rates
US5072944A (en) * 1989-04-04 1991-12-17 Sumitomo Rubber Industries, Ltd. Three-piece solid golf ball
US5255922A (en) * 1991-07-26 1993-10-26 Wilson Sporting Goods Co. Golf ball with improved cover
US5314187A (en) * 1991-07-26 1994-05-24 Wilson Sporting Goods Co. Golf ball with improved cover
US5209485A (en) * 1991-09-23 1993-05-11 Lisco, Inc. Restricted flight golf ball
US6126559A (en) * 1993-04-28 2000-10-03 Spalding Sports Worldwide, Inc. Golf ball with very thick cover
US6837805B2 (en) 1993-04-28 2005-01-04 Callaway Golf Company Golf ball with multi-layer cover
US5833553A (en) * 1993-04-28 1998-11-10 Lisco, Inc. Golf ball
US6309314B1 (en) 1993-04-28 2001-10-30 Spalding Sports Worldwide, Inc. Golf ball with very thick cover
US6682440B2 (en) 1993-04-28 2004-01-27 Callaway Golf Company Golf ball with multi-layer cover
US6220972B1 (en) 1993-04-28 2001-04-24 Spalding Sports Worldwide, Inc. Golf ball with multi-layer cover
US6561928B2 (en) 1993-04-28 2003-05-13 Spalding Sports Worldwide, Inc. Golf ball with multi-layer cover
US5433447A (en) * 1994-03-25 1995-07-18 Hansberger Precision Golf Incorporated Golf ball
US5733977A (en) * 1995-03-09 1998-03-31 Sumitomo Rubber Industries, Ltd. Solid golf ball
US6123629A (en) * 1997-09-02 2000-09-26 Sumitomo Rubber Industries Limited Method of making a golf ball with improved flight distance and shot feeling
US7029614B2 (en) * 1997-09-18 2006-04-18 Sumitomo Rubber Industries, Ltd. Method of making a multi-piece solid golf ball
US20020002085A1 (en) * 1997-09-18 2002-01-03 Sumitomo Rubber Industries, Ltd. Multi-piece solid golf ball and method of making the same
US20060194647A1 (en) * 1997-10-03 2006-08-31 Performance Indicator, Llc Golf ball with moisture exposure indicator
US6277037B1 (en) 1997-10-03 2001-08-21 Performance Dynamics Llc Golf ball with water immersion indicator
US6623382B2 (en) * 1997-10-03 2003-09-23 Performance Indicator, Llc Golf ball with moisture exposure indicator
US6358160B1 (en) 1997-10-03 2002-03-19 Performance Dynamics Llc Golf ball with water immersion indicator
US20040058753A1 (en) * 1997-10-03 2004-03-25 Performance Indicator, Llc Golf ball with moisture exposure indicator
US6878076B2 (en) 1997-10-03 2005-04-12 Performance Indicator, Llc Golf ball with moisture exposure indicator
US6207095B1 (en) 1998-09-03 2001-03-27 Acushnet Company Process for manufacturing multi-layered cores
WO2000013874A1 (en) * 1998-09-03 2000-03-16 Acushnet Company Process for manufacturing multi-layered cores
US6890992B2 (en) 1999-03-01 2005-05-10 Acushnet Company Golf ball cores with improved durability
US6508724B2 (en) 1999-03-01 2003-01-21 Jeffrey L. Dalton Golf ball cores with improved durability
US6332850B1 (en) 1999-03-01 2001-12-25 Acushnet Company Golf ball cores with improved durability
US6120390A (en) * 1999-03-01 2000-09-19 Acushnet Company Golf ball cores with improved durability
US20030045376A1 (en) * 1999-03-01 2003-03-06 Dalton Jeffrey L. Golf ball cores with improved durability
US6290797B1 (en) 1999-04-02 2001-09-18 Acushnet Company Process for making multi-layer core golf balls
US6530849B2 (en) 1999-09-15 2003-03-11 Uniroyal Chemical Company, Inc. Low cost, resilient, shear resistant polyurethane elastomers for golf ball covers
US6309313B1 (en) * 1999-09-15 2001-10-30 Uniroyal Chemical Company, Inc. Low cost, resilient, shear resistant polyurethane elastomers for golf ball covers
US6939249B2 (en) 2001-03-23 2005-09-06 Acushnet Company Golf ball having a high moment of inertia
US20040171436A1 (en) * 2001-03-23 2004-09-02 Sullivan Michael J. Golf ball having a high moment of inertia
US20020169037A1 (en) * 2001-03-23 2002-11-14 Sullivan Michael J. Golf ball having a high moment of inertia and low driver spin rate
US6743123B2 (en) * 2001-03-23 2004-06-01 Acushnet Company Golf ball having a high moment of inertia and low driver spin rate
US6596837B2 (en) 2001-03-27 2003-07-22 Acushnet Company Abrasion resistant coated golf equipment
US7059977B2 (en) * 2002-05-30 2006-06-13 Bridgestone Sports Co., Ltd. Golf ball
US20030224875A1 (en) * 2002-05-30 2003-12-04 Bridgestone Sports Co., Ltd. Golf ball
US8152653B2 (en) 2004-05-07 2012-04-10 Acushnet Company Thick inner cover multi-layer golf ball
US20080153629A1 (en) * 2004-05-07 2008-06-26 Sullivan Michael J Thick Outer Cover Layer Golf Ball
US20100160084A1 (en) * 2004-06-23 2010-06-24 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US20090170991A1 (en) * 2005-04-07 2009-07-02 The Goodyear Tire & Rubber Company Pneumatic tire having a rubber component containing exfoliated graphite
US20090253535A1 (en) * 2007-07-03 2009-10-08 Sullivan Michael J Golf ball with negative hardness gradient core
US20090011866A1 (en) * 2007-07-03 2009-01-08 Sullivan Michael J Multi-Layer Core Golf Ball Having Opposing Hardness Gradient with Steep Gradient Inner Core Layer
US20090008832A1 (en) * 2007-07-03 2009-01-08 Bulpett David A Negative Hardness Gradient Core Produced from a Low, Temperature-Based Cure Cycle Index
US20090011857A1 (en) * 2007-07-03 2009-01-08 Bulpett David A Golf Ball with Negative Hardness Gradient Core
US20090011867A1 (en) * 2007-07-03 2009-01-08 Sullivan Michael J Multi-Layer Core Golf Ball Having Opposing Hardness Gradient with Steep Gradient Outer Core Layer
US20090020911A1 (en) * 2007-07-03 2009-01-22 Acushnet Company Method of Treating Rubber Composition with Cure Inihibitor to Create Soft Skin in Golf Ball Core
US7537529B2 (en) 2007-07-03 2009-05-26 Acushnet Company Golf ball with negative hardness gradient core
US7537530B2 (en) 2007-07-03 2009-05-26 Acushnet Company Golf ball with negative hardness gradient core
US20090011862A1 (en) * 2007-07-03 2009-01-08 Bulpett David A Golf Ball with Negative Hardness Gradient Core
US20090170635A1 (en) * 2007-07-03 2009-07-02 Sullivan Michael J Golf ball layer having reduced surface hardness and method of making same
US20090176023A1 (en) * 2007-07-03 2009-07-09 Sullivan Michael J Golf ball layer having reduced surface hardness and method of making same
US7582027B2 (en) 2007-07-03 2009-09-01 Acushnet Company Negative hardness gradient inner core for dual core golf ball
US20090008831A1 (en) * 2007-07-03 2009-01-08 Bulpett David A Negative Hardness Gradient Core Produced from a Low, Time-Based Cure Cycle Index
US20100004071A1 (en) * 2007-07-03 2010-01-07 Bulpett David A Negative hardness gradient inner core for dual core golf ball
US20100004070A1 (en) * 2007-07-03 2010-01-07 Bulpett David A Negative hardness gradient inner core for dual core golf ball
US20100004073A1 (en) * 2007-07-03 2010-01-07 Bulpett David A Negative hardness gradient inner core for dual core golf ball
US7678313B2 (en) 2007-07-03 2010-03-16 Acushnet Company Method of treating rubber composition with cure inhibitor to create soft skin in golf ball core
US7678312B2 (en) 2007-07-03 2010-03-16 Acushnet Company Method of treating rubber composition with cure inhibitor to create soft skin in golf ball core
US20100087276A1 (en) * 2007-07-03 2010-04-08 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US7429221B1 (en) 2007-07-03 2008-09-30 Acushnet Company Negative hardness gradient outer core layer for dual core golf ball
US20100160085A1 (en) * 2007-07-03 2010-06-24 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US20100160083A1 (en) * 2007-07-03 2010-06-24 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US7744489B2 (en) 2007-07-03 2010-06-29 Acushnet Company Multi-layer core golf ball having opposing hardness gradient with steep gradient outer core layer
US7744490B2 (en) 2007-07-03 2010-06-29 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US20100173726A1 (en) * 2007-07-03 2010-07-08 Sullivan Michael J Golf ball having reduced surface hardness
US20100173727A1 (en) * 2007-07-03 2010-07-08 Sullivan Michael J Golf ball having reduced surface hardness
US20100215867A1 (en) * 2007-07-03 2010-08-26 Sullivan Michael J Method of treating rubber composition with cure inhibitor to create soft skin in golf ball core
US20100222156A1 (en) * 2007-07-03 2010-09-02 Sullivan Michael J Golf ball having reduced surface hardness
US20100227709A1 (en) * 2007-07-03 2010-09-09 Sullivan Michael J Golf ball having reduced surface hardness
US20100227707A1 (en) * 2007-07-03 2010-09-09 Sullivan Michael J Multilayer core golf ball having hardness gradient within and between each core layer
US7803069B2 (en) 2007-07-03 2010-09-28 Acushnet Company Negative hardness gradient inner core for dual core golf ball
US7819760B2 (en) 2007-07-03 2010-10-26 Acushnet Company Golf ball layer having reduced surface hardness and method of making same
US7857715B2 (en) 2007-07-03 2010-12-28 Acushnet Company Negative hardness gradient inner core for dual core golf ball
US7410429B1 (en) 2007-07-03 2008-08-12 Acushnet Company Negative hardness gradient inner core for dual core golf ball
US20110003651A1 (en) * 2007-07-03 2011-01-06 Sullivan Michael J Golf ball layer having reduced surface hardness and method of making same
US20110014999A1 (en) * 2007-07-03 2011-01-20 Sullivan Michael J Multi-layer core golf ball having opposing hardness gradient with steep gradient outer core layer
US7909709B2 (en) 2007-07-03 2011-03-22 Acushnet Company Multi-layer core golf ball having opposing hardness gradient with steep gradient inner core layer
US7914722B2 (en) 2007-07-03 2011-03-29 Acushnet Company Method of treating rubber composition with cure inhibitor to create soft skin in golf ball core
US20110077104A1 (en) * 2007-07-03 2011-03-31 Brian Comeau Multi-piece golf ball comprising low hardness gradient core
US20110092313A1 (en) * 2007-07-03 2011-04-21 Sullivan Michael J Dual-core comprising zero gradient center and positive gradient outer core layer
US7963863B2 (en) 2007-07-03 2011-06-21 Acushnet Company Golf ball with negative hardness gradient core
US7967703B2 (en) 2007-07-03 2011-06-28 Acushnet Company Golf ball having reduced surface hardness
US7988570B2 (en) 2007-07-03 2011-08-02 Acushnet Company Multi-layer core golf ball having opposing hardness gradient with steep gradient outer core layer
US7998002B2 (en) 2007-07-03 2011-08-16 Acushnet Company Golf ball with negative hardness gradient core
US20110218057A1 (en) * 2007-07-03 2011-09-08 Sullivan Michael J Golf ball with negative hardness gradient core
US8016696B2 (en) 2007-07-03 2011-09-13 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US20110224022A1 (en) * 2007-07-03 2011-09-15 Sullivan Michael J Multi-layer core golf ball having opposing hardness gradient with steep gradient inner core layer
US8021248B2 (en) 2007-07-03 2011-09-20 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US20110230280A1 (en) * 2007-07-03 2011-09-22 Sullivan Michael J Golf ball with negative hardness gardient core
US10220263B2 (en) 2007-07-03 2019-03-05 Acushnet Company Golf balls comprising medium hardness gradient core
US20110237350A1 (en) * 2007-07-03 2011-09-29 Sullivan Michael J Golf ball having reduced surface hardness
US8047932B2 (en) 2007-07-03 2011-11-01 Acushnet Company Golf ball having reduced surface hardness
US8128514B2 (en) 2007-07-03 2012-03-06 Acushnet Company Golf ball layer having reduced surface hardness and method of making same
US8137214B2 (en) 2007-07-03 2012-03-20 Acushnet Company Dual-core comprising negative gradient center and positive gradient outer core layer
US7857714B2 (en) 2007-07-03 2010-12-28 Acushnet Company Negative hardness gradient inner core for dual core golf ball
US8152655B2 (en) 2007-07-03 2012-04-10 Acushnet Company Multi-piece golf ball comprising low hardness gradient core
US8157675B2 (en) 2007-07-03 2012-04-17 Acushnet Company Golf ball with negative hardness gradient core
US8157674B2 (en) 2007-07-03 2012-04-17 Acushnet Company Multi-layer core golf ball having opposing hardness gradient with steep gradient inner core layer
US10130848B2 (en) 2007-07-03 2018-11-20 Acushnet Company Golf ball multilayer core having a gradient quotient
US8221266B2 (en) 2007-07-03 2012-07-17 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US8257199B2 (en) 2007-07-03 2012-09-04 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US8257200B2 (en) 2007-07-03 2012-09-04 Acushnet Company Multi-layer core golf ball having opposing hardness gradient with steep gradient outer core layer
US8298098B2 (en) 2007-07-03 2012-10-30 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8298097B2 (en) 2007-07-03 2012-10-30 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8303437B2 (en) 2007-07-03 2012-11-06 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8308584B2 (en) 2007-07-03 2012-11-13 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8313395B2 (en) 2007-07-03 2012-11-20 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8313394B2 (en) 2007-07-03 2012-11-20 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8317637B2 (en) 2007-07-03 2012-11-27 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8337330B2 (en) 2007-07-03 2012-12-25 Acushnet Company Multi-piece golf ball comprising low hardness gradient core
US8398911B2 (en) 2007-07-03 2013-03-19 Acushnet Company Golf ball layer having reduced surface hardness and method of making same
US10112081B2 (en) 2007-07-03 2018-10-30 Acushnet Company Golf ball incorporating positive hardness gradient thermoset polyurethane outer cover layer
US8414426B2 (en) 2007-07-03 2013-04-09 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US8454454B2 (en) 2007-07-03 2013-06-04 Acushnet Company Golf ball having reduced surface hardness
US8500575B2 (en) 2007-07-03 2013-08-06 Acushnet Company Golf ball comprising a core layer having a hardness gradient and trans gradient
US8523709B2 (en) 2007-07-03 2013-09-03 Acushnet Company Golf ball having reduced surface hardness
US8523708B2 (en) 2007-07-03 2013-09-03 Acushnet Company Golf ball having reduced surface hardness
US8529374B2 (en) 2007-07-03 2013-09-10 Acushnet Company Golf ball with negative hardness gardient core
US10035046B2 (en) 2007-07-03 2018-07-31 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US8562461B2 (en) 2007-07-03 2013-10-22 Acushnet Company Multi-layer core golf ball having opposing hardness gradient with steep gradient outer core layer
US8672777B2 (en) 2007-07-03 2014-03-18 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US8690712B2 (en) 2007-07-03 2014-04-08 Acushnet Company Golf ball comprising a core layer having a hardness gradient and trans gradient
US8747254B2 (en) 2007-07-03 2014-06-10 Acushnet Company Golf ball having modified surface hardness
US8747255B2 (en) 2007-07-03 2014-06-10 Acushnet Company Golf ball having modified surface hardness
US8784235B2 (en) 2007-07-03 2014-07-22 Acushnet Company Golf ball with negative hardness gradient core
US8821316B2 (en) 2007-07-03 2014-09-02 Acushnet Company Negative hardness gradient cores made of polyalkenamer rubber for golf balls
US8845456B2 (en) 2007-07-03 2014-09-30 Acushnet Company Multi-piece golf ball comprising low hardness gradient core
US8911305B2 (en) 2007-07-03 2014-12-16 Acushnet Company Multi-layer core golf ball having opposing hardness gradient with steep gradient outer core layer
US8956251B2 (en) 2007-07-03 2015-02-17 Acushnet Company Golf ball having reduced surface hardness
US8968117B2 (en) 2007-07-03 2015-03-03 Acushnet Company Dual-core comprising zero gradient center and positive gradient outer core layer
US9011271B2 (en) 2007-07-03 2015-04-21 Acushent Company Negative hardness gradient inner core for dual core golf ball
US9056227B2 (en) 2007-07-03 2015-06-16 Acushnet Company Golf ball comprising a core having a shallow hardness gradient
US9072945B2 (en) 2007-07-03 2015-07-07 Acushnet Company Multi-piece golf ball comprising low hardness gradient core
US10029150B2 (en) 2007-07-03 2018-07-24 Acushnet Company Golf ball having medium positive gradient quotient and low trans content
US9186556B2 (en) 2007-07-03 2015-11-17 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US9199134B2 (en) 2007-07-03 2015-12-01 Acushnet Company Method of making color golf ball and resulting color golf ball
US9220950B2 (en) 2007-07-03 2015-12-29 Acushnet Company Negative hardness gradient cores made of polyalkenamer rubber for golf balls
US9238160B2 (en) 2007-07-03 2016-01-19 Acushnet Company Method of making color golf ball and resulting color golf ball
US9259621B2 (en) 2007-07-03 2016-02-16 Acushnet Company Multi-layer core golf ball having opposing hardness gradient with steep gradient outer core layer
US9259619B2 (en) 2007-07-03 2016-02-16 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US9289653B2 (en) 2007-07-03 2016-03-22 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US10029151B2 (en) 2007-07-03 2018-07-24 Acushnet Company Multi-layer cover golf ball having a high acid casing layer
US9320945B2 (en) 2007-07-03 2016-04-26 Acushnet Company Multi-piece golf ball comprising low hardness gradient core
US9320944B2 (en) 2007-07-03 2016-04-26 Acushnet Company Multi-layer cover dual core golf ball having a high acid casing and low gradient center
US9433830B2 (en) 2007-07-03 2016-09-06 Acushnet Company Golf ball having reduced surface hardness
US9468811B2 (en) 2007-07-03 2016-10-18 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US9480881B2 (en) 2007-07-03 2016-11-01 Acushnet Company Golf ball single layer core having a gradient quotient
US9480882B2 (en) 2007-07-03 2016-11-01 Acushnet Company Golf ball multilayer core having a gradient quotient
US9511264B2 (en) 2007-07-03 2016-12-06 Acushnet Company Multilayer core golf ball having hardness gradient within and between each core layer
US9610478B2 (en) 2007-07-03 2017-04-04 Acushnet Company Golf ball core with soft outer transition volume and negative hardness gradient
US9636549B2 (en) 2007-07-03 2017-05-02 Acushnet Company Negative hardness gradient inner core for dual core golf ball
US9669263B2 (en) 2007-07-03 2017-06-06 Acushnet Company Multi-layer cover golf ball having a high acid casing layer
US9795836B2 (en) 2007-07-03 2017-10-24 Acushnet Company Golf balls comprising medium hardness gradient core
US10252115B2 (en) 2007-07-03 2019-04-09 Acushnet Company Golf ball incorporating positive hardness gradient thermoset polyurethane outer cover layer
US9180347B2 (en) 2009-06-26 2015-11-10 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US8556749B2 (en) 2009-06-26 2013-10-15 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US8398507B2 (en) 2009-06-26 2013-03-19 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US8197359B2 (en) 2009-06-26 2012-06-12 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US8025594B2 (en) 2009-06-26 2011-09-27 Acushnet Company Golf ball with single layer core having specific regions of varying hardness
US9289654B2 (en) 2009-06-26 2016-03-22 Acushnet Company Golf ball with single layer core having specific regions of varying hardness

Similar Documents

Publication Publication Date Title
US3572721A (en) Play balls
US3572722A (en) Play balls
US3502338A (en) Golf ball made from a vulcanized elastomer composition
US3992014A (en) Molded solid golf ball comprising a silane for greater velocity
US5779562A (en) Multi-core, multi-cover golf ball
JP3217379B2 (en) Multi-layer golf ball and composition
US6149535A (en) Golf ball with spun elastic threads
US6368237B1 (en) Multi-layer golf ball
US6315680B1 (en) Multilayer golf ball
US6780933B2 (en) Multi-layered golf ball and composition
US5704854A (en) Three-piece solid golf ball
US6824476B2 (en) Multi-layer golf ball
US6120390A (en) Golf ball cores with improved durability
US4844471A (en) Golf ball core composition including dialkyl tin difatty acid
US6117025A (en) Golf ball with cover having at least three layers
JP2634554B2 (en) Golf balls having improved coating
US6287217B1 (en) Multi-layer golf ball
US4852884A (en) Use of metal carbamate accelerator in peroxide-cured golf ball center formulation
KR101539799B1 (en) Golf balls with cores or intermediate layers prepared from highly-neutralized ethylene copolymers and organic acids
CA2271258C (en) Golf ball with soft core
AU766496B2 (en) Game balls with cover containing post crosslinkable thermoplastic polyurethane and method of making same
US6995191B2 (en) Multi-layer golf ball with a foamed intermediate layer
AU769860B2 (en) Golf ball which includes fast-chemical-reaction-produced component and method of making same
US4770422A (en) Composition for making durable golf balls and other products
JP3607301B2 (en) Multi-layer golf ball and composition