Invention Grant
- Patent Title: Golf ball
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Application No.: US15782577Application Date: 2017-10-12
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Publication No.: US11376476B2Publication Date: 2022-07-05
- Inventor: Chiemi Mikura , Kazuyoshi Shiga , Hikaru Nagakura , Ryota Sakamine
- Applicant: Dunlop Sports Co. Ltd.
- Applicant Address: JP Kobe
- Assignee: Dunlop Sports Co. Ltd.
- Current Assignee: Dunlop Sports Co. Ltd.
- Current Assignee Address: JP Kobe
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JPJP2016-213479 20161031
- Main IPC: A63B37/04
- IPC: A63B37/04 ; A63B37/00 ; C08K5/00 ; C08K5/098 ; C08K5/09 ; C08K5/14

Abstract:
An object of the present invention is to provide a golf ball having an excellent flight performance on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover covering the spherical core, wherein a hardness difference D1 (H75−H0) between a hardness H75 at a point radially located at a distance of 75% from a center of the spherical core and a center hardness H0 of the spherical core is 10 or more and 27 or less in Shore C hardness, and a hardness difference D2 (Hs−H75) between a surface hardness Hs of the spherical core and the hardness H75 at the point radially located at the distance of 75% from the center of the spherical core is 0 or more and 6.5 or less in Shore C hardness.
Public/Granted literature
- US20180117421A1 GOLF BALL Public/Granted day:2018-05-03
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