EP1084736A1 - Balles de golf avec densite uniforme - Google Patents

Balles de golf avec densite uniforme Download PDF

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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Withdrawn
Application number
EP00118668A
Other languages
German (de)
English (en)
Inventor
Chester S. Shira
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.)
Carbite Inc
Original Assignee
Carbite Inc
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 Carbite Inc filed Critical Carbite Inc
Publication of EP1084736A1 publication Critical patent/EP1084736A1/fr
Withdrawn legal-status Critical Current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
    • 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.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP00118668A 1999-08-30 2000-08-29 Balles de golf avec densite uniforme Withdrawn EP1084736A1 (fr)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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