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. 23, 2003
Filed:
Nov. 21, 2001
Hiroki Ashida, Gifu, JP;
Mizuno Corporation, Osaka, JP;
Abstract
A golf club shaft has a braid layer including first and second diagonal yarns. The diagonal yarns are positioned at the degrees of orientation (+&thgr;, −&thgr;) of +30° to +60° and −30° to −60° against the longitudinal axis of the shaft, respectively. The braid layer has a portion that satisfies an inequality, n·{(t−&sgr;t)/cos &thgr;}≦&pgr;·D≦n·{(t+&sgr;t)/cos&thgr;}, wherein t is the average width of the diagonal yarns, &sgr;t is the standard deviation of the width of the diagonal yarns, D is the shaft diameter, and n is the number of diagonal yarns. The braid layer satisfying the inequality minimizes spaces S between the diagonal yarns. With the shaft of the present invention, the ratio of the longitudinal modulus of the shaft during a swing to the longitudinal modulus of the shaft when the head speed is zero gradually increases along with the increase in the head speed, thus suppressing shaft's deformation caused by centrifugal force during a swing and facilitating swings of the club.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile