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:
Oct. 09, 2007
Filed:
May. 04, 2005
Junji Umezawa, Chichibu, JP;
Kazufumi Tabata, Chichibu, JP;
Hiroyuki Nagasawa, Chichibu, JP;
Yoshihiro Yamana, Tokyo, JP;
Hidekazu Saito, Kurashiki, JP;
Hiroki Kimura, Kurashiki, JP;
Junji Umezawa, Chichibu, JP;
Kazufumi Tabata, Chichibu, JP;
Hiroyuki Nagasawa, Chichibu, JP;
Yoshihiro Yamana, Tokyo, JP;
Hidekazu Saito, Kurashiki, JP;
Hiroki Kimura, Kurashiki, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
Abstract
A three-piece solid golf ball composed of a solid core, an intermediate layer which encloses the core, and a cover layer which encloses and is softer than the intermediate layer is characterized in that the solid core undergoes a deflection of 2.8 to 3.6 mm when a load of 130 kg is applied thereto from an initial load of 10 kg and has a surface hardness and a center hardness which differ by at least 15 Shore D hardness units; the intermediate layer has a surface hardness which differs from the surface hardness of the solid core by not more than 12 Shore D hardness units; and the cover layer has a surface hardness which differs from the surface hardness of the intermediate layer by at least 7 Shore D hardness units, is made primarily of a thermoplastic polyurethane, and has a thickness in a range of 0.5 to 1.3 mm. This combination of features provides an overall outstanding golf ball endowed with excellent flight characteristics, excellent controllability and durability, and a soft feel on impact.