Golf ball
AssigneeDunlop Sports Co. Ltd.
InventorsTakahiro SAJIMA, Hironori TAKIHARA
Life of this patent
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Abstract
A golf ball 2 includes a core 4 and a cover 6. A difference (FB2−FC2) between a secondary natural frequency FB2 of the golf ball 2 and a secondary natural frequency FC2 of the core 4 is greater than 420 Hz and not greater than 760 Hz. Preferably, a sum (FB2+FC2) is not greater than 5200 Hz. Preferably, the FC2 is not less than 1700 Hz and not greater than 2400 Hz. Preferably, the FB2 is not less than 2250 Hz and not greater than 3050 Hz. Preferably, an amount of compressive deformation Dc of the core 4 is 2.30 to 3.90 mm. Preferably, an amount of compressive deformation Db of the golf ball 2 is 1.80 to 3.30 mm. Preferably, a thickness Tc of the cover 6 is 1.00 to 2.30 mm. Preferably, a Shore D hardness Hc of the cover 6 is 54 to 67.
Claims8
A golf ball comprising a core and a cover positioned outside the core, wherein
- when a secondary natural frequency of the golf ball is FB2 and a secondary natural frequency of the core is FC2, a difference (FB2−FC2) is greater than 420 Hz and not greater than 760 Hz.
Dependencies are inferred from the claim text.