| US 7,520,822 B2 | ||
| Golf club head | ||
| Hisashi Yamagishi, Tokyo (Japan); and Yasunori Imamoto, Tokyo (Japan) | ||
| Assigned to Bridgestone Sports Co., Ltd., (Japan) | ||
| Filed on Aug. 17, 2007, as Appl. No. 11/840,582. | ||
| Application 11/840582 is a continuation of application No. 10/868363, filed on Jun. 16, 2004, granted, now 7,347,795. | ||
| Claims priority of application No. P2003-173667 (JP), filed on Jun. 18, 2003. | ||
| Prior Publication US 2007/0298907 A1, Dec. 27, 2007 | ||
| Int. Cl. A63B 53/04 (2006.01) | ||
| U.S. Cl. 473—345 [473/347; 473/349] | 18 Claims |
| 1. A golf club head of a hollow shell structure, comprising:
a first member that includes titanium-based metal material and includes a face portion and an edge portion continuous with
the face portion;
a second member formed of a fiber reinforced resin;
a metal plate made of a metal material, which is larger in specific gravity than the titanium-based metal material, that is
separate and spaced apart from the first member, extends in a direction, which is different from a toe-heel direction of the
golf club head, and includes at least a part of sole portion; and
a weight member formed of a metal whose specific gravity is greater than that of the metal plate;
a metal sole portion having a center edge portion, a toe side edge portion, and a heel side edge portion, the center edge
portion having almost straight shape in the toe-heel direction;
wherein a width of the metal sole portion corresponding to the toe side edge portion and the heel side edge portion in face-back
direction becomes larger as a position on the metal sole portion gets farther from the center edge portion; and
wherein
H≤0.05V+7.5
where V denotes volume of the golf club head in cc unit, and H denotes height of center of gravity of the golf club head in
mm unit.
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