Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 15, 2007
0Patent Application Number
113530360
Date Filed
February 14, 2006
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A hollow golf club head allowing to increase the repulsion and the degree of design freedom, while maintaining the durability. A hollow golf club head having a head body formed from a metal, wherein a hole is formed in the vicinity of the middle of a crown portion in the head body, the hole is closed with a cover member made of a material different from the head body, and the ratio (ρm/ρt) of the specific gravity ρm of the head body and the specific gravity ρf of the cover member is set equal or superior to 1.3.
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