Patent ID: 7500923
Filing Date: 2009-03-10
Classification: A63B

Abstract:
1. A putter head comprising: a head body having a face portion; and a face insert fitted in the face portion, the face insert including a high-hardness portion that forms a hitting surface, a low-hardness portion joined to the high-hardness portion and having a hardness lower than that of the high-hardness portion, and a projecting portion formed at least on a central portion of the high-hardness portion, the low-hardness portion filling a recessed portion formed by the projecting portion, wherein the low-hardness portion is joined to the high hardness portion at a surface of the face insert opposite the hitting surface, wherein the projecting portion is formed on the central portion of the high-hardness portion and both lateral peripheral portions of the high-hardness portion, and a proportion of a total planar area of the projecting portion to a planar area of the high-hardness portion in the central portion is greater than a proportion of a total planar area of the projecting portion to the planar area of the high-hardness portion in the peripheral portions.