Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masayoshi Nishio0
Date of Patent
July 4, 2006
0Patent Application Number
104535130
Date Filed
June 4, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A golf club comprises a club shaft and a hollow club head, wherein the club head has a loft angle of from 14 to 18 degrees, a head volume of not less than 250 cc, and a sweet spot at a vertical distance of from 1 to 5 mm downwards of a face center, and the club shaft has a variable flexural rigidity whose minimum is in a range of from 5 to 10 N·m2, and the minimum flexural rigidity occurs in a range between 0% and 40% of the length of the club shaft from the end of the club shaft.
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