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:
Mar. 19, 2019
Filed:
Nov. 09, 2016
Dunlop Sports Co. Ltd., Kobe-shi, Hyogo, JP;
Kosuke Tachibana, Kobe, JP;
Kazuya Kamino, Kobe, JP;
Toshiyuki Tarao, Kobe, JP;
Mami Tanaka, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, Hyogo, JP;
Abstract
A golf ballincludes a core, a mid layer, and a cover. A difference DH in hardness between a surface and a central point of the core, a thickness Tm and a hardness Hm of the mid layer, a thickness Tc and a hardness Hc of the cover, and an amount of compressive deformation Sb of the golf ballmeet the following mathematical formulas (DH*Hm)/(Hc*Tc)>80 and ((Sb*Tc)/(Hc*Hm*Tm))*1000>0.75. A hardness Hc of the coveris equal to or less than 40. A material of the coveris a resin composition. The resin composition includes a polyurethane (A) and a polyrotaxane (B).