Title:
ゴルフボール
Document Type and Number:
Japanese Patent JP6834455
Kind Code:
B2
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.
Inventors:
Takahiro Sajima
Hiroki Takihara
Hiroki Takihara
Application Number:
JP2016245452A
Publication Date:
February 24, 2021
Filing Date:
December 19, 2016
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
A63B37/00
Domestic Patent References:
| JP2013048806A | ||||
| JP11076461A | ||||
| JP2015047341A | ||||
| JP2016123629A | ||||
| JP2002126129A | ||||
| JP2003070936A | ||||
| JP11333025A |
Attorney, Agent or Firm:
Patent business corporation Yuko patent office
Kengo Oka
Sumitomo Norio
Kuroyoshi Murohashi
Hiroshi Kasakawa
Kei Someya
Yukari Imamura
Hiroomi Nakao
Kengo Oka
Sumitomo Norio
Kuroyoshi Murohashi
Hiroshi Kasakawa
Kei Someya
Yukari Imamura
Hiroomi Nakao