logo

For the Inventor, By the Inventor

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.:

US 9855467 B1

PDFFull Text
Date of Patent:
Jan. 02, 2018

Filed:

May. 30, 2014

Golf ball

Applicant:

Dunlop Sports Co., Ltd., Kobe-shi, Hyogo, JP;

Inventors:

Ayaka Shindo, Kobe, JP;

Chiemi Mikura, Kobe, JP;

Ryota Sakamine, Kobe, JP;

Sho Goji, Kobe, JP;

Assignee:

DUNLOP SPORTS CO. LTD., Kobe-Shi, Hyogo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

John E Simms, Jr

Int. Cl.
CPC ...
A63B 37/02 (2006.01); A63B 37/04 (2006.01); A63B 37/06 (2006.01); A63B 37/00 (2006.01); C08K 5/00 (2006.01); C08L 9/00 (2006.01); C08K 5/09 (2006.01); C08G 18/48 (2006.01); C08G 18/76 (2006.01); C08L 75/08 (2006.01); C08K 5/098 (2006.01); C08K 5/14 (2006.01);
U.S. Cl.
CPC ...
A63B 37/0092 (2013.01); A63B 37/0051 (2013.01); A63B 37/0063 (2013.01); A63B 37/0065 (2013.01); A63B 37/0074 (2013.01); C08G 18/4854 (2013.01); C08G 18/7671 (2013.01); C08K 5/0025 (2013.01); C08K 5/09 (2013.01); C08L 9/00 (2013.01); C08L 75/08 (2013.01); C08K 5/098 (2013.01); C08K 5/14 (2013.01); C08L 2666/52 (2013.01);
Abstract

An object of the present invention is to provide a golf ball showing a great flight distance on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein when JIS-C hardness of the spherical core is measured at points located at distances of 0% (core center), 37.5%, 75.0% and 100% (core surface) from the core center of the spherical core, a hardness difference (Hs−Ho) between a surface hardness (Hs) thereof and a center hardness (Ho) thereof is 20 or more, a ratio ((H−Ho)/(H−Ho)) of a hardness difference (H−Ho) to a hardness difference (H−Ho) is 0.6 or less, and a compression deformation amount (D (mm)) of the spherical core and the 37.5% point hardness (H) satisfy a relation of H≦−9×D+95.

Find Patent Forward Citations

Loading…