Patent ID: 7513836
Filing Date: 2009-04-07
Classification: A63B

Abstract:
1. A hollow golf club head comprising a sole portion, a crown portion and a side portion, wherein a ratio of an average thickness of said sole portion to that of said crown portion is 1:0.3 to 0.8, a crown thin-walled region is formed on a face side of said crown portion, a crown thick-walled region is formed on a back side of said crown portion, and a ratio of an average thickness of said crown thick-walled region to that of said crown thin-walled region is 1:0.5 to 0.9, wherein said crown thin-walled region extends from the face side end of the crown portion at a substantially constant thickness at least 20 mm toward the back side of said crown portion wherein said sole portion includes a sole thick-walled region on a face side and a sole thin-walled region on a back side, and wherein a thickness of said side portion is the same as a thickness of said crown thin-walled region.