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:
Feb. 05, 2019
Filed:
Nov. 04, 2016
Dunlop Sports Co. Ltd., Kobe-shi, Hyogo, JP;
Kazuya Kamino, Kobe, JP;
Kosuke Tachibana, Kobe, JP;
Toshiyuki Tarao, Kobe, JP;
Mami Tanaka, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo, JP;
Abstract
A golf ballincludes an inner core, an outer core, a mid layer, and a cover. A diameter D1, a volume V1, a hardness H1o at a central point, and a boundary inside hardness H1in of the inner core; a volume V2, a boundary outside hardness H2out, and a surface hardness H2s of the outer core; a thickness Tm and a hardness Hm of the mid layer; and a thickness Tc and a hardness Hc of the covermeet the following mathematical formulas (1) to (4): 1.0<V2/V1<7.0 (1); −2<H2s−H2out<2 (2); 600<(H1o+H1in)*(D1/2)/2<1000 (3); 620<Tc*Hc*Hm/Tm<900 (4). The coverincludes a polyrotaxane.