Patent ID: 8342985
Filing Date: 2013-01-01
Classification: A63B

Abstract:
1. An iron-type golf club head comprising: a head body made of at least one kind of metallic material comprising a face member and a head body main portion, the head body having a face for hitting a golf ball and a recess portion, and a weight member made of a metallic material having a specific gravity larger than said at least one kind of metallic material of the head body, the weight member fitted to and covering said recess portion to form a part of an outer surface of the golf club head, wherein said recess portion is formed on said head body main portion and defined by a first surface extending from said outer surface which is substantially parallel to said face and a second surface extending from said outer surface and intersecting with the first surface, the weight member is welded to the first surface and the second surface so that a welded part between the weight member and the first surface extends along a part of the first surface from said outer surface of the golf club head to a first ending position, and a welded part between the weight member and the second surface extends along a part of the second surface from said outer surface of the golf club head to a second ending position, the surface of the weight member opposed to said first surface and said second surface is provided at each of said first ending position and said second ending position with a step extending away from said first and said second surface to form a gap of at least 0.1 mm and at most 3.0 mm extending from the first ending position to the second ending position so as to form a closed space between said recess portion and said weight member, said closed space is formed on a head bottom side of a sweet spot of said head, said second surface intersects with the first surface at a right angle, said gap is substantially constant from the first ending position to the second ending position and substantially same as the sizes of the steps, and the closed space has a L-shaped cross-sectional shape.