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:
Jun. 03, 2003
Filed:
Nov. 21, 2001
Hiroki Ashida, Gifu, JP;
Mizuno Corporation, Osaka, JP;
Abstract
A golf club has a shaft made of fiber reinforced plastics. The shaft has braided layers with substantially symmetrical diagonal yarns which are positioned at orientation angles +&thgr;, −&thgr; from more than 0° to +10° and from less than −0° to −10° respectively, and/or from 45° to less than +90° and from −45° to more than −90° respectively, against the longitudinal axis of the shaft at at least a portion along the longitudinal direction of the shaft. The Poisson's ratio &ngr; expressed by the ratio of lateral strain to longitudinal strain is 0.5 or less at least at the portion when load is applied to the shaft. The portion with the Poisson's ratio of 0.5 or less is preferably on the grip side, thus facilitating a swing of the club.