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US 6,659,887 B2Granted
Solid golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorHideo Watanabe
Life of this patent
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Abstract
A solid golf ball includes a core and a cover. The golf ball satisfies the following conditions (1) to (3): (1) the cover has a thickness of at least 2.5 mm; (2) the cover has a Shore D hardness of 59 to 62; and (3) a value obtained through subtraction of JIS C hardness of a center portion of the core from JIS C hardness of a surface portion of the core is at least 8.
Claims7
A two-piece solid golf ball comprising a core and a cover, the golf ball satisfying the following conditions (1) to (5):
- (1) the cover has a thickness of at least 2.5 mm;
- (2) the cover has a Shore D hardness of 59 to 62;
- (3) a value obtained through subtraction of JIS C hardness of a center portion of the core from JIS C hardness of a surface portion of the core is at least 8;
- (4) the μ-hardness of the core is 2.7 to 5.5 mm;
- and
- (5) the μ-hardness of the entire ball is 2.3 mm to 3.5 mm,
- wherein the cover is formed of a material containing a dominant amount of a blend resin containing 10 to 90% by mass of an ionomer resin neutralized by divalent metal ions and 90 to 10% by mass of an ionomer resin neutralized by monovalent metal ions.
4 more elements
Dependencies are inferred from the claim text.