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:
Dec. 04, 2018
Filed:
Mar. 13, 2017
Dunlop Sports Co. Ltd., Kobe-shi, Hyogo, JP;
Hirotaka Nakamura, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, Hyogo, JP;
Abstract
A shaftincludes a plurality of layers formed by fiber reinforced resins. The layers include a hoop layer and bias layers. The hoop layer includes a full length hoop layer sconstituted with a prepreg having a fiber elastic modulus of equal to or greater than 30 (tf/mm) and having a fiber weight per unit area of equal to or greater than 50 (g/m) but equal to or less than 80 (g/m). The bias layers s, s, s, and sinclude high elasticity containing bias layers sand sconstituted with a prepreg contacting a high elastic pitch-based carbon fiber having a fiber elastic modulus of equal to or greater than 80 (tf/mm). Preferably, the full length hoop layer sis disposed outside the high elasticity containing bias layers sand s