Patent ID: 9079081
Filing Date: 2015-07-14
Classification: A63B

Abstract:
1. An iron head comprising: a striking face; a backside surface; a sole surface; a hosel; a recess portion provided in an upper portion of the backside surface; a protruding portion provided at a lower portion of the backside surface and projecting backward; a first hollow portion provided on a heel side of the protruding portion; and a second hollow portion disposed on a toe side and inside the protruding portion, said protruding portion including a middle portion between the first hollow portion and the second hollow portion, wherein said first hollow portion is disposed away from the second hollow portion so that a distance between the first hollow portion and the second hollow portion in a direction from the heel side to the toe side gradually increases from an upper surface of the protruding portion toward the sole surface, and said cavity portion has a first maximum length in a vertical direction parallel with the striking face is set between 20% and 50% of a second maximum length of the striking face in the vertical direction.