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:
Oct. 11, 2016
Filed:
May. 04, 2015
Bridgestone Sports Co., Ltd., Tokyo, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a golf club shaft. The shaft is made of a fiber reinforced resin. When a position 100 mm apart from a distal end of the shaft is represented by P, a position 200 mm apart by P, a position 500 mm apart by P, and a position 1,000 mm apart by P, thicknesses at the positions are defined as P: not more than 1.0 mm, P: not more than 0.9 mm, P: not more than 0.6 mm and P: not more than 0.6 mm. Each section between the positions has a thickness larger than a thickness transition obtained by connecting the thicknesses at the positions by a straight line. The shaft includes a plurality of prepregs which include first prepregs containing carbon fibers and a second prepreg containing a high specific gravity material.