# US 2013/0157782 A1 · Golf ball

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- Number: US 2013/0157782 A1
- Document ID: US20130157782A1
- Status: Published application
- Kind: A1
- Application number: 13/328,506
- Filed: 2011-12-16
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Bridgestone Sports Co., Ltd.
- Inventors: Atsushi KOMATSU; Yuichiro OZAWA; Hiroshi NASU
- Web page: https://patentgrep.com/patent/US20130157782A1

## CPC

- A63B 37/00222: {Physical properties, e.g. hardness}
- A63B 37/0003: {Golf balls}
- A63B 37/0004: {Surface depressions or protrusions}
- A63B 37/0023: {Covers}
- A63B 37/0074: {Two piece balls, i.e. cover and core}
- A63B 37/0075: {Three piece balls, i.e. cover, intermediate layer and core}
- A63B 37/0092: {Hardness distribution amongst different ball layers}
- A63B 45/00: Apparatus or methods for manufacturing balls (working of plastics or substances in a plastic state B29)
- C08G 18/4063: {Mixtures of compounds of group C08G18/62 with other macromolecular compounds}
- C08G 18/4288: {modified by higher fatty oils or their acids or by resin acids}
- C08G 18/73: acyclic
- A63B 37/0031: {Hardness}
- A63B 37/0064: {Diameter}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

A golf ball of the present invention includes: a core located in the center of the golf ball; a cover surrounding the outside of the core and having plural dimples on the surface thereof; and a paint layer surrounding the outside of the cover. The paint layer is formed of a material having rubber elasticity. The paint layer may have a thickness of at most approximately 100 μm. The paint layer may have a hardness of at most approximately 70 in terms of JIS-C hardness. The cover may contain ionomer resin. The cover may have a hardness of at least 40 in terms of Shore D hardness.

## Claims

### Claim 1

A golf ball comprising:
a core located in a center of the golf ball;
a cover surrounding an outside of the core and having plural dimples on a surface thereof; and
a paint layer surrounding an outside of the cover, the paint layer formed of a material having rubber elasticity.

### Claim 2 (depends on 1)

The golf ball according to claim 1, wherein the paint layer has a thickness of at most approximately 100 μm.

### Claim 3 (depends on 1)

The golf ball according to claim 1, wherein the paint layer has a hardness of at most approximately 70 in terms of JIS-C hardness.

### Claim 4 (depends on 1)

The golf ball according to claim 1, wherein a material used for forming the paint layer has a Young's Modulus of at most approximately 70 MPa.

### Claim 5 (depends on 1)

The golf ball according to claim 1, wherein the material for forming the paint layer has a Poisson's ratio of at least approximately 0.45.

### Claim 6 (depends on 1)

The golf ball according to claim 1, wherein the cover contains ionomer resin.

### Claim 7 (depends on 1)

The golf ball according to claim 1, wherein the cover has a hardness of at least 40 in terms of Shore D hardness.