EP1084736A1 - Balles de golf avec densite uniforme - Google Patents
Balles de golf avec densite uniforme Download PDFInfo
- Publication number
- EP1084736A1 EP1084736A1 EP00118668A EP00118668A EP1084736A1 EP 1084736 A1 EP1084736 A1 EP 1084736A1 EP 00118668 A EP00118668 A EP 00118668A EP 00118668 A EP00118668 A EP 00118668A EP 1084736 A1 EP1084736 A1 EP 1084736A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- golf ball
- density
- ball
- layers
- 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.)
- Withdrawn
Links
Images
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
-
- 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
- A63B37/005—Cores
- A63B37/006—Physical properties
- A63B37/0066—Density; Specific gravity
Definitions
- golf balls are manufactured using various materials for cores, inner cores, outer covers and covers. These materials are each of a different density and thus, if they are not perfectly centered about one another, there can be a heavy side and a light side to the ball. If a straight line is drawn between the light and heavy points in a golf ball, and this line is parallel to the desired direction of travel, then when striking the ball towards the target, the ball's travel will be true and straight to the target. If this imaginary line is perpendicular to the target and the ball is struck towards that target, then the ball's travel will veer slightly in the direction of the heavy side of the ball.
- the golf ball core thus formed is centerless ground to achieve near perfect roundness.
- This is usually done by using retractable steel pins in the mold.
- the extremely high injection pressure and viscosity of the cover material creates very high pressures on the core and even with steel pins, movement is almost impossible to avoid.
- cover thickness 0.005 inches to 0.020 inches from one side of the ball to another.
- a standard inspection method in golf ball production is to x-ray or cross section balls to note differences in cover thickness. This produces a heavy side and a light side to the ball with the attendant disadvantages mentioned above.
- This invention involves: (1) making one or more covering layers of the golf ball of the same density as the "standard" core material (1.18gm/cc) ⁇ resulting in a ball that is heavier than the standard, but weight balanced; (2) making the cover heavier and the core lighter (for example, both 1.13gm/cc) ⁇ resulting in a ball of the desired weight and properly weight balanced; and (3) making the core lighter, matching the density of a typical cover material (0.99gm/cc) resulting in a ball that is lighter than the standard, but properly weight balanced.
- Figure 1 is a perspective view of a conventional golf ball.
- Figure 2 is a cross section of a conventional golf ball in which the core 10 and the outer layer 11 are perfectly centered.
- Figure 3 is a cross section of a typical golf ball in which the core 10 has an outer layer 11 which is thicker on the right side of the core than the left side.
- Figure 4 is a multi-layer golf ball wherein the layers 11 and 12 are thicker on the right side than on the left side.
- Applicant's invention preferably involves making the density of the core material and the density of the cover materials the same.
- the initial layer and each succeeding layer can be constructed of suitable materials that have been formulated with constituents that bring the density of the layer to exactly match the 1.13 gm/cc of the core. In this manner, assuming the finished ball is perfectly spherical, it is not critical that the cover and core be concentric since the ball will always be perfectly balanced.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US38553299A | 1999-08-30 | 1999-08-30 | |
US385532 | 1999-08-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1084736A1 true EP1084736A1 (fr) | 2001-03-21 |
Family
ID=23521802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00118668A Withdrawn EP1084736A1 (fr) | 1999-08-30 | 2000-08-29 | Balles de golf avec densite uniforme |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1084736A1 (fr) |
JP (1) | JP2001079117A (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1234601A2 (fr) * | 2001-02-20 | 2002-08-28 | Carbite, Inc. | Balle de golf avec densité uniforme |
US6899639B2 (en) | 2002-08-22 | 2005-05-31 | Wilson Sporting Goods Co. | Two piece balanced golf ball |
US6916254B2 (en) * | 2003-01-02 | 2005-07-12 | Acushnet Company | Golf ball with small inner core |
US6945879B2 (en) | 2002-08-22 | 2005-09-20 | Wilson Sporting Goods Co. | Multi-layered balanced golf-ball |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003000762A (ja) | 2001-06-21 | 2003-01-07 | Bridgestone Sports Co Ltd | ゴルフボール |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4274637A (en) * | 1979-01-31 | 1981-06-23 | Questor Corporation | Golf ball having cellular cover |
US5150906A (en) * | 1989-03-10 | 1992-09-29 | Lisco, Inc. | Multi-piece golf balls and methods of manufacture |
US5273286A (en) * | 1992-11-06 | 1993-12-28 | Sun Donald J C | Multiple concentric section golf ball |
-
2000
- 2000-08-29 EP EP00118668A patent/EP1084736A1/fr not_active Withdrawn
- 2000-08-30 JP JP2000261501A patent/JP2001079117A/ja not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4274637A (en) * | 1979-01-31 | 1981-06-23 | Questor Corporation | Golf ball having cellular cover |
US5150906A (en) * | 1989-03-10 | 1992-09-29 | Lisco, Inc. | Multi-piece golf balls and methods of manufacture |
US5273286A (en) * | 1992-11-06 | 1993-12-28 | Sun Donald J C | Multiple concentric section golf ball |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1234601A2 (fr) * | 2001-02-20 | 2002-08-28 | Carbite, Inc. | Balle de golf avec densité uniforme |
EP1234601A3 (fr) * | 2001-02-20 | 2003-06-25 | Carbite, Inc. | Balle de golf avec densité uniforme |
US6899639B2 (en) | 2002-08-22 | 2005-05-31 | Wilson Sporting Goods Co. | Two piece balanced golf ball |
US6945879B2 (en) | 2002-08-22 | 2005-09-20 | Wilson Sporting Goods Co. | Multi-layered balanced golf-ball |
US6916254B2 (en) * | 2003-01-02 | 2005-07-12 | Acushnet Company | Golf ball with small inner core |
US7001287B2 (en) | 2003-01-02 | 2006-02-21 | Acushnet Company | Golf ball with small inner core |
US7094160B2 (en) | 2003-01-02 | 2006-08-22 | Acushnet Company | Golf ball with small inner core |
US7195569B2 (en) | 2003-01-02 | 2007-03-27 | Acushnet Company | Golf ball with small inner core |
US7361103B2 (en) | 2003-01-02 | 2008-04-22 | Acushnet Company | Golf ball with small inner core |
US7537531B2 (en) | 2003-01-02 | 2009-05-26 | Acushnet Company | Golf ball with small inner core |
Also Published As
Publication number | Publication date |
---|---|
JP2001079117A (ja) | 2001-03-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE GB SE |
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AX | Request for extension of the european patent |
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17P | Request for examination filed |
Effective date: 20010427 |
|
AKX | Designation fees paid |
Free format text: DE GB SE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20040302 |