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.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Feb. 12, 2024
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Hikaru Nagakura, Kobe, JP;
Takumi Kaneko, Kobe, JP;
Takehiko Hyodo, Kobe, JP;
Kazuyoshi Shiga, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe, JP;
Abstract
An object of the present disclosure is to provide a golf ball having excellent durability and an increased spin rate on driver shots to travel a suppressed flight distance. The present disclosure provides a golf ball comprising a spherical constituent member, wherein the spherical constituent member is formed from a rubber composition containing (a) a rubber component containing a natural rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, a center hardness (Ho) of the spherical constituent member is 65 or more in Shore C hardness, a hardness difference (Hs−Ho) between a surface hardness (Hs) and the center hardness (Ho) of the spherical constituent member is less than 16 in Shore C hardness, and an absolute value of a hardness difference (Hs−H50) between the surface hardness (Hs) of the spherical constituent member and a hardness (H50) at a 50% point of a radius of the spherical constituent member from a center of the spherical constituent member is 10 or less in Shore C hardness.