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. 13, 2018
Filed:
Sep. 30, 2016
Bridgestone Sports Co., Ltd., Tokyo, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
Abstract
In a multi-piece solid golf ball having a core, a cover and an intermediate layer therebetween, letting Hc be the JIS-C hardness at the core center, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the core surface, the core has a hardness profile which satisfies the conditions 0≦H12−Hc≦15, 15≦Ho−H12≦30, (Ho−H12)−(H12−Hc)≧10 and 20≦Ho−Hc≦40. Also, letting A be the value represented by (Ho−H12)−(H12−Hc), the spin index of the ball, defined as the dynamic coefficient of friction for the ball multiplied by A, is at least 3.0. This golf ball can satisfy at a high level the flight and control performance relied on by professional golfers and skilled amateurs.