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. 30, 2014
Filed:
Dec. 21, 2012
Dunlop Sports Co., Ltd., Kobe-shi, Hyogo, JP;
Hiroyuki Takeuchi, Kobe, JP;
Dunlop Sports Co. Ltd., Kobe-Shi, JP;
Abstract
A shaft full length is defined as Ls and a distance between a tip end of the shaft and a center of gravity G of the shaft is defined as Lg. In a shaft, Lg/Ls is 0.54 or greater and 0.65 or less. A shaft weight Ws is 50 g or greater and 85 g or less. The shafthas at least three bias layer pairs. One bias layer pair of the three bias layer pairs is a pitch-containing bias layer pair having a pitch based carbon fiber. Two bias layer pairs of the three bias layer pairs are PAN-containing bias layer pairs having a PAN based carbon fiber. Preferably, the PAN-containing bias layer pairs are located outside and inside the pitch-containing bias layer pair.