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:
Dec. 08, 2003
Tomoaki Mori, Kanagawa, JP;
Masahiko Miyamoto, Kanagawa, JP;
Yoh Nishizawa, Kanagawa, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
The golf club head () of the present invention has a face portion () for striking a golf ball, a crown portion () connected to the face portion (), and a sole portion () connected to the face portion (). The ratio of either lower of a first equivalent rigidity of a crown member () and a second equivalent rigidity of a sole member () to the higher is equal to or less than 0.75. The present invention provides a golf club () provided with the hollow golf club head () capable of increasing the carry of a golf ball based on a technique for increasing the carry of a golf ball other than conventional ones such as adjustment of the loft angle and reduction in the thickness of the striking surface, and provides a method of designing such a hollow golf club head as well.