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:
Mar. 10, 2009
Filed:
Jun. 13, 2007
Applicant:
Hiroyuki Takeuchi, Hyogo, JP;
Inventor:
Hiroyuki Takeuchi, Hyogo, JP;
Assignee:
SRI Sports Limited, Kobe-shi, Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A63B 53/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A golf club shaft (), tubular and having a hollow portion, which includes a laminate of fiber reinforced prepregs (throughA,through). The laminate has a first part (I) composed of a plurality of first prepregs (P) and a second part (P). A loss factor (tan δ) of the first part (I) is set to not less than 0.005 nor more than 0.02, when the loss factor is measured at a frequency of 10 Hz under a condition of 10° C. A loss factor (tan δ) of the second part (P) is set to not less than 0.10 nor more than 0.50, when the loss factor is measured at a frequency of 10 Hz under the condition of 10° C.