Invention Grant
- Patent Title: Golf ball
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Application No.: US17534453Application Date: 2021-11-24
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Publication No.: US11712605B2Publication Date: 2023-08-01
- Inventor: Toshiyuki Takubo , Takahiro Sajima
- Applicant: Sumitomo Rubber Industries, Ltd.
- Applicant Address: JP Kobe
- Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
- Current Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
- Current Assignee Address: JP Kobe
- Agency: Xsensus LLP
- Priority: JP 20211167 2020.12.21
- Main IPC: A63B37/06
- IPC: A63B37/06 ; A63B37/00 ; C08L33/08 ; C08K13/02

Abstract:
A golf ball includes a core, a mid layer, and a cover. An amount of compressive deformation C3 of the golf ball can be not less than 2.80 mm. The golf ball can satisfy the following mathematical formulas (1) and (2):
C1>(124.8−Hs)/11.5 (1)
C2−C1≥(−1/6*C1+(68−H2)/20+(5−Hd)/100)*T2 (2), where
C1 is an amount of compressive deformation (mm) of the core,
C2 is an amount of compressive deformation (mm) of a sphere including the core and the mid layer,
Hd is Hs−Ho,
Ho is a hardness (Shore C) of a center the core,
Hs is a hardness (Shore C) of a surface of the core,
H2 is a hardness (Shore D) of the mid layer, and
T2 is a thickness (mm) of the mid layer.
C1>(124.8−Hs)/11.5 (1)
C2−C1≥(−1/6*C1+(68−H2)/20+(5−Hd)/100)*T2 (2), where
C1 is an amount of compressive deformation (mm) of the core,
C2 is an amount of compressive deformation (mm) of a sphere including the core and the mid layer,
Hd is Hs−Ho,
Ho is a hardness (Shore C) of a center the core,
Hs is a hardness (Shore C) of a surface of the core,
H2 is a hardness (Shore D) of the mid layer, and
T2 is a thickness (mm) of the mid layer.
Public/Granted literature
- US20220193495A1 GOLF BALL Public/Granted day:2022-06-23
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