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:
Apr. 23, 2019
Filed:
Aug. 28, 2017
Dunlop Sports Co. Ltd., Kobe-shi, Hyogo, JP;
Hirotaka Nakamura, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo, JP;
Abstract
An EI value at a point Pseparated by 16 inches from a tip end Tp is defined as E, a shaft wall thickness at the point Pis defined as T, an EI value at a point Pseparated by 6 inches from the tip end Tp is defined as E, and a shaft wall thickness at the point Pis defined as T. In a shaft, Eis 2.4 (kgf·m) or more, Eis 2.7 (kgf·m) or less, and E/Eis 0.95 or more but 1.50 or less, E/Tis 1.9 or less, and E/Tis 3.0 or more. A high-elasticity partial reinforcement layer including a fiber having a tensile elastic modulus of 30 (t/mm) or more but 40 (t/mm) or less is disposed in at least a part of a region falling within a range of ±4 inches from the point P