The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Dec. 05, 2023

Filed:

Sep. 20, 2022
Applicant:

Sumitomo Rubber Industries, Ltd., Kobe, JP;

Inventors:

Daijiro Kojima, Kobe, JP;

Takahiro Sajima, Kobe, JP;

Hikaru Nagakura, Kobe, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A63B 37/02 (2006.01); A63B 37/00 (2006.01); C08F 279/02 (2006.01);
U.S. Cl.
CPC ...
A63B 37/0051 (2013.01); A63B 37/0031 (2013.01); A63B 37/0033 (2013.01); A63B 37/0063 (2013.01); A63B 37/0065 (2013.01); A63B 37/0066 (2013.01); A63B 37/0075 (2013.01); A63B 37/00621 (2020.08); A63B 37/00622 (2020.08); C08F 279/02 (2013.01);
Abstract

An object of the present disclosure is to provide a golf ball having excellent durability and flight distance and good shot feeling for an average golfer who hits a golf ball at a slow head speed. The present disclosure provides a golf ball comprising a spherical core and at least two cover layers covering the spherical core, wherein a difference between a core surface crosslinking density and a core center crosslinking density is more than 1.0×10mol/mand less than 9.0×10mol/m, a hardness difference between a core surface hardness Cs (Shore C hardness) and a core center hardness Co (Shore C hardness) is 13.0 or more and 30.0 or less, a compression deformation amount of the core when applying a load from an initial load of 98 N to a final load of 1275 N to the core is 3.8 mm or more, and the at least two cover layers include a first cover layer and a second cover layer positioned closer to the spherical core than the first cover layer, an average hardness Dave=(Ti×Hi+To×Ho)/(Ti+To) of the first cover layer and the second cover layer is 55 or more, where To (mm) is a thickness of the first cover layer, Ho (Shore D) is a slab hardness of the first cover layer, Ti (mm) is a thickness of the second cover layer, and Hi (Shore D) is a slab hardness of the second cover layer.


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