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:
Nov. 13, 2012
Filed:
Dec. 07, 2007
Toshio Tanimoto, Kunitachi, JP;
Toshio Tanimoto, Kunitachi, JP;
E & F Co., Ltd., Tokyo, JP;
Abstract
To provide a golf club head which is easy-to-hit and which restrains the reduction of flight distance at the time of off-center shot to the minimum without making a sacrifice of the flight distance at the time of sweet spot shot, and a method for manufacturing the golf club head, a golf club head () has a hollow structure including a face portion () and a body portion (), the body portion () includes a ring-shaped body barrel portion () as a front portion, and a tail portion () as a rear portion, and the average thickness of the body barrel portion () is 0.1 to 0.6 mm, and the mass of the tail portion () including a weight portion () is 20 to 70 g. The relations k/k≦3 and 2 kN/mm≦1/(1/k+1/k)≦5 kN/mm are satisfied where k(kN/mm) is the rigidity of the face portion () and k(kN/mm) is the rigidity of the body barrel portion ().