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:
Jun. 06, 2017
Filed:
Oct. 28, 2014
Dunlop Sports Co. Ltd., Kobe-shi, Hyogo, JP;
Kosuke Tachibana, Kobe, JP;
Kazuhiko Isogawa, Kobe, JP;
DUNLOP SPORTS CO. LTD., Kobe-shi, JP;
Abstract
A golf ball includes a spherical core and a cover. The core includes an inner core, a mid core, and an outer core. A hardness H(C) is equal to or greater than a hardness H(B). A hardness H(E) is equal to or greater than a hardness H(D). An angle α is calculated by (Formula 1) from a thickness Y (mm) of the mid core, the hardness H(C), and the hardness H(D). An angle β is calculated by (Formula 2) from a thickness Z (mm) of the outer core, the hardness H(E), and the hardness H(F). Each of the angle α and a difference (α−β) between the angles α and β is equal to or greater than 0°. The golf ball has excellent flight performance upon a shot with a driver.α=(180/π)*tan [{()−()}/  (Formula 1)β=(180/π)*tan [{()()  (Formula 2)